Publication Release Date: November 16, 2005
- 1 - Revision 1.3
ISD1400 SERIES
SINGLE-CHIP
VOICE RECORD/PLAYBACK DEVICES
16- AND 20-SECOND DURATION
ISD1400 SERIES
- 2 -
TABLE OF CONTENTS
1. GENERAL DESCRIPTION.............................................................................................................................3
2. FEATURES ........................................................................................................................................................3
3. BLOCK DIAGRAM..........................................................................................................................................4
4. PIN CONFIGURATION ..................................................................................................................................5
5. PIN DESCRIPTION..........................................................................................................................................6
6. FUNCTIONAL DESCRIPTION....................................................................................................................10
6.1. DETAILED DESCRIPTION ..............................................................................................................................10
6.2. OPERATIONAL MODES .................................................................................................................................11
6.2.1. Operational Modes Description ..........................................................................................................11
7. TIMING DIAGRAMS ....................................................................................................................................13
8. ABSOLUTE MAXIMUM RATINGS............................................................................................................14
8.1 OPERATING CONDITIONS ..............................................................................................................................15
9. ELECTRICAL CHARACTERISTICS .........................................................................................................16
9.1. PARAMETERS FOR PACKAGED PARTS ..........................................................................................................16
9.1.1. Typical Parameter Variation with Voltage and Temperature .............................................................19
9.2. PARAMETERS FOR DIE ................................................................................................................................20
9.2.1. Typical Parameter Variation with Voltage and Temperature .............................................................23
10. TYPICAL APPLICATION CIRCUIT ........................................................................................................24
11. PACKAGE DRAWING AND DIMENSIONS............................................................................................27
11.1. 28-LEAD 300 MIL PLASTIC SMALL OUTLINE IC (SOIC) ............................................................................27
11.2. 28-LEAD 600 MIL PLASTIC DUAL INLINE PACKAGE (PDIP).......................................................................28
11.3. DIE PHYSICAL LAYOUT [1]..........................................................................................................................29
12. ORDERING INFORMATION.....................................................................................................................31
13. VERSION HISTORY.................................................................................................................................... 32
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 3 - Revision 1.3
1. GENERAL DESCRIPTION
Winbond’s ISD1400 ChipCorder® series provide high-quality, single-chip, Record/Playback solutions
to short-duration messaging applications. The CMOS devices include an on-chip oscillator,
microphone preamplifier, automatic gain control, anti-aliasing filter, smoothing filter, and speaker
amplifier. A minimum Record/Playback subsystem can be configured with a microphone, a speaker,
several passive components, two push buttons and a power source. Recordings are stored into on-
chip non-volatile memory cells, providing zero-power message storage. This unique, single-chip
solution is made possible through Winbond’s patented Multi-Level Storage (MLS) technology. Voice
and audio signals are stored directly into memory in their natural form, providing high-quality, solid-
state voice reproduction.
2. FEATURES
• Single +5 volt power supply
• Duration: 14 and 20 seconds.
• Easy-to-use single-chip, voice record/playback solution
• High-quality, natural voice/audio reproduction
• Manual switch or microcontroller compatible Playback can be edge- or level-activated
• Directly cascadable for longer durations
• Automatic power-down (push-button mode)
o Standby current 1 µA (typical)
• Zero-power message storage
o Eliminates battery backup circuits
• Fully addressable to handle multiple messages
• 100-year message retention (typical)
• 100,000 record cycles (typical)
• On-chip oscillator
• Programmer support for play-only applications
• Packaged types: Leaded and Lead-Free
• Available in die, PDIP and SOIC
• Temperature:
o Commercial - Packaged unit : 0°C to 70°C, Die : 0°C to 50°C
o Industrial - Packaged unit : -40°C to 85°C
ISD1400 SERIES
- 4 -
3. BLOCK DIAGRAM
Internal Clock Timing
Sampling Clock
128K Cell
Nonvolatile
Multilevel Storage
Array
Analog Transceivers
Decoders
Device ControlPower Conditioning
Automatic
Gain Control
(AGC)
5-Pole Active
Antialiasing Filter
5-Pole Active
Smoothing Filter Amp
Pre-
Amp
SP +
SP -
RECLEDPLAYLPLAYEREC
VCCA VSSA VSSD VCCD
AGC
MIC REF
MIC
XCLK
AmpANA IN
ANA OUT
Address Buffers
A0 A1 A2 A3 A4 A5 A6 A7
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 5 - Revision 1.3
4. PIN CONFIGURATION
SOIC / PDIP
A0
A1
A2
A3
A4
A5
NC
NC
A6
A7
NC
VSSD
VSSA
SP +
REC
XCLK
RECLED
PLAYE
PLAYL
NC
ANA OUT
ANA IN
AGC
MIC REF
MIC
VCCA
SP-
VCCD
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Note: NC means must be No connect
ISD1400 SERIES
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5. PIN DESCRIPTION
PIN NAME PIN NO FUNCTION
A0-A7 1-6, 9, 10 Address Inputs: The address inputs have two functions,
depending on the level of the two Most Significant Bits (MSB)
of the address.
If either or both of the two MSBs are LOW, the inputs are all
interpreted as address bits and are used as the start address
for the current record or playback cycle. The address pins are
inputs only and do not output internal address information as
the operation progresses. Address inputs are latched by the
falling edge of PLAYE , PLAYL , or REC .
If both A6 & A7 are HIGH, then the device is in special
operational modes. Please refer to operational modes section
for details.
NC 7, 8, 11, 22 NC: No Connect
VSSD, VSSA 12, 13
Ground: Similar to VCCA and VCCD, the analog and digital
circuits internal to the ISD1400 series use separate ground
buses to minimize noise. These pins should be tied together
as close as possible to the device.
SP+, SP- 14, 15 Speaker Outputs: The SP+ and SP- pins provide direct drive
for loudspeakers with impedances as low as 16 Ω. A single
output may be used, but, for direct-drive loudspeakers, the
two opposite-polarity outputs provide an improvement in
output power of up to four times over a single-ended
connection. Forthermore, when SP+ and SP- are used, a
speakercoupling capacitor is not required. A single-ended
connection will require an AC-coupling capacitor between the
SP pin and the speaker. The speaker outputs are in a high-
impedance state during a record cycle, and held at VSSA
during power down.
VCCA, VCCD 16, 28
Supply Voltage: Analog and digital circuits internal to the
ISD1400 series use separate power buses to minimize noise
on the chip. These voltage buses are brought out to separate
pins on the package and should be tied together as close to
the supply as possible. It is important that the power supply
be decoupled as close to the package as possible.
MIC 17
Microphone: The microphone input transfers its signal to the
on-chip preamplifier. An on-chip Automatic Gain Control
(AGC) circuit controls the gain of this preamplifier from –15 to
24dB. An external microphone should be AC coupled to this
pin via a series capacitor. The capacitor value, together with
the internal 10 KΩ resistance on this pin, determines the low-
frequency cutoff for the ISD1400 series passband. See
Winbond’s Application Information for additional information
on low-frequency cutoff calculation.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 7 - Revision 1.3
PIN NAME PIN NO FUNCTION
MIC REF 18 Microphone Reference: The MIC REF input is the inverting
input to the microphone preamplifier. This provides a noise-
canceling or common-mode rejection input to the device
when connected to a differential microphone.
AGC 19
Automatic Gain Control (AGC): The AGC dynamically
adjusts the gain of the preamplifier to compensate for the
wide range of microphone input levels. The AGC allows the
full range of sound, from whispers to loud sounds, to be
recorded with minimal distortion. The “attack” time is
determined by the time constant of a 5 KΩ internal resistance
and an external capacitor (C6 on the schematic of section 11,
Figure 5) connected from the AGC pin to VSSA analog ground.
The “release” time is determined by the time constant of an
external resistor (R5) and an external capacitor (C6)
connected in parallel between the AGC pin and VSSA analog
ground. Nominal values of 470 KΩ and 4.7 µF give
satisfactory results in most cases.
ANA IN 20 Analog Input: The analog input pin transfers its signal to the
chip for recording. For microphone inputs, the ANA OUT pin
should be connected via an external capacitor to the ANA IN
pin. This capacitor value, together with the 3.0 KΩ input
impedance of ANA IN, is selected to give additional cutoff at
the low-frequency end of the voice passband. If the desired
input is derived from a source other than a microphone, the
signal can be fed, capacitively coupled, into the ANA IN pin
directly.
ANA OUT 21 Analog Output: This pin provides the preamplifier output to
the user. The voltage gain of the preamplifier is determined
by the voltage level at the AGC pin.
PLAYL [2] 23 Playback, Level-Activated: When this input signal is held
LOW, a playback cycle is initiated, and playback continues
until PLAYL is pulled HIGH, or an EOM marker is detected.
The device automatically powers down and enters into
standby mode upon completion of a playback cycle.
PLAYE [2] 24 Playback, Edge-Activated: When a LOW-going transition is
input to this pin, a playback cycle begins. Taking PLAYE
HIGH during a playback cycle will not terminate the current
cycle. Playback continues until an EOM is encountered. Upon
completion of a playback cycle, the device automatically
powers down and enters into standby mode.
ISD1400 SERIES
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PIN NAME PIN NO FUNCTION
RECLED 25 Record LED: The RECLED output is LOW during a record
cycle. It can be used to drive an LED to indicate a record
cycle is in progress. In addition, RECLED pulses LOW
momentarily when an end-of-message is encountered in a
playback operation.
XCLK 26
External Clock: The input has an internal pull-down device.
The ISD1400 is configured at the factory with an internal
sampling clock frequency that guarantees its minimum
nominal record/playback time. For instance, an ISD1420
operating within specification will be observed to always have
a minimum of 20 seconds of recording time. The sampling
frequency is then maintained to a variation of +2.25 percent
over the commercial temperature and operating voltage
ranges, while still maintaining the minimum specified
recording duration. This will result in some devices having a
few percent more than nominal recording time.
The Internal clock has a +5 percent tolerance over the
industrial temperature and voltage range. A regulated power
supply is recommended for industrial temperature parts. If
greater precision is required, the device can be clocked
through the XCLK pin as follows:
EXTERNAL CLOCK SAMPLE RATES
Part Number Sample Rate Required Clock
ISD1416 8.0 kHz 1024 kHz
ISD1420 6.4 kHz 819.2 kHz
These recommended clock rates should not be varied
because the antialiasing and smoothing filters are fixed, and
aliasing problems can occur if the sample rate differs from the
one recommended. The duty cycle on the input clock is not
critical, as the clock is immediately divided by two. If the
XCLK is not used, this input must be connected to
ground.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 9 - Revision 1.3
PIN NAME PIN NO FUNCTION
REC 27 Record Input: The REC input is an active-LOW record
signal. The device records whenever REC is LOW. This
signal must remain LOW for the duration of the recording.
REC takes precedence over either playback ( PLAYE or
PLAYL ) signal. If REC is pulled LOW during a playback
cycle, the playback immediately ceases and recording
begins.
A record cycle is completed when REC is pulled HIGH or
the memory space is filled.
And end-of-message marker (EOM) is internally recorded,
enabling a subsequent playback cycle to terminate
appropriately. The device automatically powers down to
standby mode when REC goes HIGH.
Notes:
[1] The REC signal is debounced for 50 ms on the rising edge to prevent a false retriggering from a push-
button switch.
[2] During playback, if either PLAYE or PLAYL is held LOW during EOM or OVF, the device will still
enter into standby mode and the internal oscillator and timing generator will stop. However, the rising
edge of PLAYE and PLAYL are not debounced and any subsequent falling edge (particularly switch
bounce) present on the input pins will initiate another playback.
ISD1400 SERIES
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6. FUNCTIONAL DESCRIPTION
6.1. DETAILED DESCRIPTION
Speech/Sound Quality
The Winbond’s ISD1400 series offer 6.4 and 8.0 kHz sampling frequencies, allowing the user a choice
of speech quality options. The speech samples are stored directly into on-chip non-volatile memory
without the digitization and compression associated with other solutions. Direct analog storage
provides a very true, natural sounding reproduction of voice, music, tones, and sound effects not
available with most solidstate digital solutions.
Duration
To meet end system requirements, the ISD1400 series offer single-chip solutions at 16 and 20
seconds.
TABLE 1: ISD1400 SERIES SUMMARY
Part Number Duration
(Seconds)
Input Sample
Rate (kHz)
Typical Filter Pass
Band* (kHz)
ISD1416 16 8.0 3.3
ISD1420 20 6.4 2.6
* 3dB roll-off-point
EEPROM Storage
One of the benefits of Winbond’s ChipCorder® technology is the use of on-chip non-volatile memory,
providing zero-power message storage. The message is retained for up to 100 years typically without
power. In addition, the device can be re-recorded typically over 100,000 times.
Basic Operation
The ISD1400 ChipCorder® series are controlled by a single control signal, REC , PLAYE (edge-
activated playback) or PLAYL (level-activated playback). The ISD1400 parts are configured for
simplicity of design in a single/multiple-message application. Using the address lines will allow multiple
message applications.
Automatic Power-Down Mode
At the end of a playback or record cycle, the ISD1400 series automatically return to a low-power
standby mode, consuming typically 0.5 µA. After a playback cycle, the device powers down
automatically at the end of the message. After a record cycle, the device powers down immediately
after REC is pulled to HIGH.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 11 - Revision 1.3
Addressing
In addition to providing single message application, the ISD1400 series provide a full addressing
capability.
The ISD1400 series have 160 distinct addressable segments, providing the below resolutions. See
Application Information for ISD1400 address tables.
TABLE 2: DEVICE PLAYBACK/RECORD DURATIONS
Part Number Minimum Duration (Seconds)
ISD1416 100 ms
ISD1420 125 ms
6.2. OPERATIONAL MODES
The ISD1400 series have several built-in operational modes providing maximum functionality with a
minimal additional components. The operational modes use the address pins, but are mapped to
outside the normal address range. When the two Most Significant Bits (MSBs), A6 and A7, are HIGH,
the remaining address signals are interpreted as mode bits and not as address bits. Therefore,
operational modes and direct addressing are not compatible and cannot be used simultaneously.
There are two important considerations for using operational modes. Firstly, all operations begin
initially at address 0, which is the beginning address. Later operations can begin at other address
locations, depending on the operational mode(s) chosen. In addition, the address pointer is reset to 0
when the device is changed from record to playback but not from playback to record when A4 is HIGH
in Operational Mode.
Secondly, an Operational Mode is executed when any of the control inputs, PLAYE , PLAYL or
REC , goes LOW and the two MSBs are HIGH. This Operational Mode remains in effect until the next
LOW-going control input signal, at which point the current address/mode levels are sampled and
executed.
6.2.1. Operational Modes Description
The Operational Modes can be used in conjunction with a microcontroller, or they can be hardwired to
provide the desired system operation.
A0 – Message Cueing
Message Cueing allows the user to skip through messages, without knowing the actual physical
addresses of each message. Each LOW pulse causes the internal address pointer to skip to the next
message. This mode is used for playback only and typically used with the A4 Operational Mode.
ISD1400 SERIES
- 12 -
A1 – Delete EOM Markers
The A1 Operational Mode allows recording messages sequentially and playback as a single message
with only one EOM set at the end of the final message.
A2 – Unused
A3 – Message Looping
The A3 Operational Mode allows repeating playback a message continuously from the beginning of
the memory. A message can completely fill the ISD1400 device and will loop from beginning to end.
Pulsing PLAYE will start the playback and pulsing PLAYL will end the playback.
A4 – Consecutive Addressing
During normal operation, the address pointer will reset when a message is played through to an
EOM marker. The A4 Operational Mode inhibits the address pointer reset, allowing messages to be
recorded or played back consecutively. When the device is in a static state; i.e., not recording or
playback, momentarily taking this pin LOW will reset the address counter to zero.
A5 – Unsued
TABLE 3: OPERATIONAL MODES
Mode Function Typical Use Jointly Compatible [1]
A0 Message cueing Fast-forward through messages A4
A1 Delete EOM markers Position EOM marker at the end of
the last message
A3, A4
A2 Unused
A3 Looping Continuous playback from Address 0 A1
A4 Consecutive
addressing
Record/playback multiple consecutive
messages
A0, A1
A5 Unused
1 Additional Operational Modes can be used simultaneously with the given mode.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 13 - Revision 1.3
7. TIMING DIAGRAMS
A0-A7
THOLD
TSET TSET
THOLD
REC
TREC TREC
RECLED
TLED1 TLED2
MIC
ANA IN
TRPUD TRPDD
FIGURE 1: RECORD
REC
PLAYL
PLAYE
A0-A7
SP+/-
TPLAY
THOLD
TSET
TEOM
TPPUD
RECLED
TSET TSET
THOLD THOLD
TPPDD
TPPDD TPPUD
TEOM
(1)
(2)
1. REC must be HIGH for the entire duration of a playback cycle.
2. RECLED funstions as an EOM playback.
FIGURE 2: PLAYBACK
ISD1400 SERIES
- 14 -
8. ABSOLUTE MAXIMUM RATINGS2
TABLE 4: ABSOLUTE MAXIMUM RATINGS (PACKAGED PARTS)
CONDITIONS VALUES
Junction temperature 150ºC
Storage temperature range -65ºC to +150ºC
Voltage applied to any pin (VSS – 0.3V) to (VCC + 0.3V)
Voltage applied to any pin (Input current limited to ±20 mA) (VSS – 1.0V) to (VCC + 1.0V)
Lead temperature (Soldering – 10sec) 300ºC
VCC – VSS -0.3V to +7.0V
TABLE 5: ABSOLUTE MAXIMUM RATINGS (DIE)
CONDITIONS VALUES
Junction temperature 150ºC
Storage temperature range -65ºC to +150ºC
Voltage applied to any pad (VSS – 0.3V) to (VCC + 0.3V)
Voltage applied to any pad (Input current limited to ±20mA) (VSS – 1.0V) to (VCC + 1.0V)
Lead Temperature (soldering 10 seconds) 330º C
VCC – VSS -0.3V to +7.0V
2 Stresses above those listed may cause permanent damage to the device. Exposure to the absolute maximum
ratings may affect device reliability and performance. Functional operation is not implied at these conditions.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 15 - Revision 1.3
8.1 OPERATING CONDITIONS
TABLE 6: OPERATING CONDITIONS (PACKAGED PARTS)
CONDITIONS VALUES
Commercial operating temperature range (Case temperature) 0ºC to +70ºC
Industrial operating temperature (Case temperature) -40ºC to +85ºC
Supply voltage (VCC) [1] +4.5V to +5.5V
Ground voltage (VSS) [2] 0V
TABLE 7: OPERATING CONDITIONS (DIE)
CONDITIONS VALUES
Commercial operating temperature range 0ºC to +50ºC
Supply voltage (VCC) [1] +4.5V to +6.5V
Ground voltage (VSS) [2] 0V
[1] VCC = VCCA = VCCD
[2] VSS = VSSA = VSSD
ISD1400 SERIES
- 16 -
9. ELECTRICAL CHARACTERISTICS
9.1. PARAMETERS FOR PACKAGED PARTS
TABLE 8: DC PARAMETERS
PARAMETERS SYMBOLS MIN[2] TYP[1] MAX[2] UNITS CONDITIONS
Input Low Voltage VIL 0.8 V
Input High Voltage VIH 2.4 V
Output Low Voltage VOL 0.4 V IOL = 4.0 mA
Output High Voltage VOH 2.4 V IOH = -1.6 mA
VCC Current (Operating) ICC 15 30 mA VCC = 5.5V[3],
REXT = ∞
VCC Current (Standby) ISB 0.5 10 µA
[3] [4]
Input Leakage Current IIL +1 µA
Input Current HIGH w/Pull
Down
IILPD 130 µA Force VCC
[5]
Output Load Impedance REXT 16 Ω Speaker Load
Preamp IN Input
Resistance
RMIC 4 9 17 KΩ Pins 17, 18
ANA IN Input Resistance RANA IN 2.5 3 5 KΩ
Preamp Gain 1 APRE1 20 23 26 dB AGC = 0.0V
Preamp Gain 2 APRE2 -45 -15 dB AGC = 2.5V
ANA IN to SP+/- Gain AARP 20 22 25 dB
AGC Output Resistance RAGC 2.5 5 9.5 KΩ
Preamp Out Source IPREH -2 mA @ VOUT = 1.0V
Preamp In Sink IPREL 0.5 mA @ VOUT = 2.0V
[1] Typical values @ TA = 25º and 5.0V.
[2] All Min/Max limits are guaranteed by Winbond via electronical testing or characterization. Not all
specifications are 100 percent tested.
[3] VCCA and VCCD connected together.
[4] REC , PLAYL , and PLAYE must be at VCCD.
[5] XCLK pin .
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 17 - Revision 1.3
TABLE 9: AC PARAMETERS
CHARACTERISTICS SYMBOLS MIN[2] TYP[1] MAX[2] UNITS CONDITIONS
Sampling Frequency
ISD1416
ISD1420
FS
8.0
6.4
kHz
kHz
[5]
[5]
Filter Pass Band
ISD1416
ISD1420
FCF
3.3
2.6
kHz
kHz
3 dB Roll-Off Point[3][6]
3 dB Roll-Off Point[3][6]
Record Duration
ISD1416
ISD1420
TREC
16
20
sec
sec
Playback Duration
ISD1416
ISD1420
TPLAY
16
20
sec
sec
[5]
[5]
RECLED ON Delay TLED1 5 msec
RECLED OFF Delay
ISD1416
ISD1420
TLED2 30
40
38.9
48.6
95
110
msec
msec
Address Setup Time TSET 300 nsec
Address Hold Time THOLD 0 nsec
Record Power-Up Delay
ISD1416
ISD1420
TRPUD
26
32
msec
msec
Record Power-Down Delay
ISD1416
ISD1420
TRPDD
26
32
msec
msec
Play Power-Up Delay
ISD1416
ISD1420
TPPUD
26
32
msec
msec
Play Power-Down Delay
ISD1416
ISD1420
TPPDD 6.5
8.1
msec
msec
ISD1400 SERIES
- 18 -
CHARACTERISTICS SYMBOLS MIN[2] TYP[1] MAX[2] UNITS CONDITIONS
EOM Pulse Width
ISD1416
ISD1420
TEOM
12.5
15.625
msec
msec
Total Harmonic Distortion THD 1 3 % @ 1 kHz
Speaker Output Power POUT 12.2 mW REXT = 16 Ω
Voltage Across Speaker Pins VOUT 1.25 2.5 V p-p REXT = 600 Ω
MIC Input Voltage VIN1 20 mV Peak-to-Peak[5]
ANA IN Input Voltage VIN2 50 mV Peak-to-Peak
Notes:
[1] Typical values @ TA = 25º and 5.0V.
[2] All Min/Max limits are guaranteed by Winbond via electronical testing or characterization. Not all specifications are
100 percent tested.
[3] Low-frequency cutoff depends upon the value of external capacitors (see Pin Descriptions)
[4] With 5.1 K Ω series resistor at ANA IN.
[5] Sampling Frequency and playback duration can vary as much as +2.25 percent over the commercial temperature
and voltage rangs. It may vary as much as +5 percent over the industrial temperature and voltage ranges. All
devices will meet the maximum sampling frequency and minimum playback duration parameters. For greater
stability, an external clock can be utilized (see Pin Descriptions)
[6] Filter specification applies to the anti-aliasing filter and the smoothing filter. Typical Parameter Variation with
Voltage and Temperature. This parameter is not checked during production testing and may vary due to process
variations and other factors. Therefore, the customer should not rely upon this value for testing purposes.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 19 - Revision 1.3
9.1.1. Typical Parameter Variation with Voltage and Temperature
-40 25 70 85
Temperature (C)
5.5 Volts 4.5 Volts
Percent Change (%)
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
Chart 4: Oscillator Stability
-40 25 70 85
Temperature (C)
5.5 Volts 4.5 Volts
0
2
4
6
8
10
Operating Current (mA)
Chart 1: Record Mode Operating
Current (ICC)
-40 25 70 85
Temperature (C)
5.5 Volts 4.5 Volts
Percent Distortion (%)
0.1
0.2
0.3
0.4
0.5
0
Chart 2: Total Harmonic Distortion
-40 25 70 85
Temperature (C)
5.5 Volts 4.5 Volts
Standby Current (mA)
0
0.10
0.15
0.20
0.25
0.30
Chart 3: Standby Current (ISB)
12
14
ISD1400 SERIES
- 20 -
9.2. PARAMETERS FOR DIE
TABLE 10: DC PARAMETERS
PARAMETERS SYMBOLS MIN[2] TYP[1] MAX[2] UNITS CONDITIONS
Input Low Voltage VIL 0.8 V
Input High Voltage VIH 2.4 V
Output Low Voltage VOL 0.4 V IOL = 4.0 mA
Output High Voltage VOH 2.4 V IOH = -1.6 mA
VCC Current (Operating) ICC 15 30 mA VCC = 5.5V[3],
REXT = ∞
VCC Current (Standby) ISB 0.5 10 µA
[3] [4]
Input Leakage Current IIL +1 µA
Input Current HIGH w/Pull
Down
IILPD 130 µA Force VCC
[5]
Output Load Impedance REXT 16 Ω Speaker Load
Preamp IN Input
Resistance
RMIC 4 9 17 KΩ Pads 17,18
ANA IN Input Resistance RANA IN 2.5 3 5 KΩ
Preamp Gain 1 APRE1 20 23 26 dB AGC = 0.0V
Preamp Gain 2 APRE2 -45 -15 dB AGC = 2.5V
ANA IN to SP+/- Gain AARP 20 22 25 dB
AGC Output Resistance RAGC 2.5 5 9.5 KΩ
Preamp Out Source IPREH -2 mA @ VOUT = 1.0V
Preamp In Sink IPREL 0.5 mA @ VOUT = 2.0V
[1] Typical values @ TA = 25º and 5.0V.
[2] All Min/Max limits are guaranteed by Winbond via electronical testing or characterization. Not all
specifications are 100 percent tested.
[3] VCCA and VCCD connected together.
[4] REC , PLAYL , and PLAYE must be at VCCD.
[5] XCLK pin.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 21 - Revision 1.3
TABLE 11: AC PARAMETERS
CHARACTERISTICS SYMBOLS MIN[2] TYP[1] MAX[2] UNITS CONDITIONS
Sampling Frequency
ISD1416
ISD1420
FS
8.0
6.4
kHz
kHz
[5]
[5]
Filter Pass Band
ISD1416
ISD1420
FCF
3.3
2.6
kHz
kHz
3 dB Roll-Off Point[3][6]
3 dB Roll-Off Point[3][6]
Record Duration
ISD1416
ISD1420
TREC
16
20
sec
sec
Playback Duration
ISD1416
ISD1420
TPLAY
16
20
sec
sec
RECLED ON Delay TLED1 5 msec
RECLED OFF Delay
ISD1416
ISD1420
TLED2
30
40
38.9
48.6
95
110
msec
msec
Address Setup Time TSET 300 nsec
Address Hold Time THOLD 0 nsec
Power-Up Delay
ISD1416
ISD1420
TRPUD
26
32
msec
msec
PD Pulse Width (Record)
ISD1416
ISD1420
TRPUD
26
32
msec
msec
PD Pulse Width (Play)
ISD1416
ISD1420
TPPUD
6.5
8.1
msec
msec
Play Power-Down Delay
ISD1416
ISD1420
TPPDD
6.5
8.1
msec
msec
ISD1400 SERIES
- 22 -
CHARACTERISTICS SYMBOLS MIN[2] TYP[1] MAX[2] UNITS CONDITIONS
EOM Pulse Width
ISD1416
ISD1420
TEOM
12.5
15.625
msec
msec
Total Harmonic Distortion THD 1 3 % @ 1 kHz
Speaker Output Power POUT 12.2 mW REXT = 16 Ω[4]
Voltage Across Speaker Pins VOUT 1.25 2.5 V p-p REXT = 600 Ω
MIC Input Voltage VIN1 20 mV Peak-to-Peak[4]
ANA IN Input Voltage VIN2 50 mV Peak-to-Peak
Notes:
[1] Typical values @ TA = 25º and 5.0V.
[2] All Min/Max limits are guaranteed by Winbond via electronical testing or characterization. Not all specifications are
100 percent tested.
[3] Low-frequency cutoff depends upon the value of external capacitors (see Pin Descriptions)
[4] With 5.1 K Ω series resistor at ANA IN.
[5] Sampling Frequency and playback duration can vary as much as +2.25 percent over the commercial temperature
and voltage rangs. It may vary as much as +5 percent over the industrial temperature and voltage ranges. All
devices will meet the maximum sampling frequency and minimum playback duration parameters. For greater
stability, an external clock can be utilized (see Pin Descriptions)
[6] Filter specification applies to the anti-aliasing filter and the smoothing filter. Typical Parameter Variation with
Voltage and Temperature. This parameter is not checked during production testing and may vary due to process
variations and other factors. Therefore, the customer should not rely upon this value for testing purposes.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 23 - Revision 1.3
9.2.1. Typical Parameter Variation with Voltage and Temperature
02550
Temperature (C)
Percent Change (%)
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
Chart 8: Oscillator Stability
6.5 Volts 5.5 Volts 4.5 Volts
02550
Temperature (C)
Percent Distortion (%)
0.1
0.2
0.3
0.4
0.5
0
Chart 6: Total Harmonic Distortion
6.5 Volts 5.5 Volts 4.5 Volts
5
10
15
02550
Temperature (C)
0
Operating Current (mA)
Chart 5: Record Mode Operating
Current (ICC)
6.5 Volts 5.5 Volts 4.5 Volts
02550
Temperature (C)
Standby Current (mA)
Chart 7: Standby Current (ISB)
6.5 Volts 5.5 Volts 4.5 Volts
0.10
0.15
0.20
0.25
0.30
0.35
0
2.0
2.5
ISD1400 SERIES
- 24 -
10. TYPICAL APPLICATION CIRCUIT
ISD1400
VCCD
VCCA
VSSD
VSSA
SP+
SP-
MIC REF
MIC
AGC
ANA IN
ANA OUT
A0
A1
A2
A3
A4
A5
A6
A7
PLAYL
PLAYE
REC
RECLED
XCLK
100 KΩ
R8
PLAYL
PLAYE
RECORD
C3
0.1 F
µ
5.1 K
Ω
R2
C6
4.7 F
µ
470 KΩ
R5
C1
220 F
µ
10 KΩ
R4
ELECTRET
MICROPHONE
VCC
C2
0.1 F
µ
C5
0.1 F
µ
C7
0.001 F
µ
1 KΩ
R9
1
2
3
4
5
6
9
10
23
24
27
25
26
19
17
18
21
20
15
14
13
12
16
28 1KΩ
R1
SPEAKER
16 Ω
10 KΩ
R3
C4
0.1 F
µ
100 KΩ
R6
100 KΩ
R7
S1
S2
S3
D1
REC
LED
FIGURE 5: DESIGN SCHEMATIC
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 25 - Revision 1.3
Functional Description Example
The following operating examples demonstrate the functionality of the ISD1400 series.
1. Record a message:
Pulling the REC signal LOW initiates a record cycle from current location. When REC is
held LOW, the recording continues. Until the memory array is filled up or when REC is
pulled HIGH, recording ceases. An EOM marker is written at the end of message. Then the
device will automatically power down.
2. Edge-activated playback:
Pulling the PLAYE signal LOW initiates a playback cycle from the beginning of the message
until the entire message is played. The rising edge of PLAYE has no effect on operation.
When the EOM marker is encountered, the device automatically powers down. A subsequent
falling edge on PLAYE initiates a new playback operation from the beginning of the
message.
3. Level-activated playback:
Holding the PLAYL signal LOW initiates a playback cycle from the beginning of the
message, until PLAYL is pulled HIGH or when the EOM marker is encountered, playback
operation stops and the device automatically powers down.
4. Record (interrupting playback).
The REC signal takes precedence over playback operation. Holding REC LOW initiates a
new record operation from current location, regardless of any current operation in progress.
5. RECLED operation.
During record, the RECLED output pin provides an active-LOW signal, which can be used to
drive an LED as a “record-in-progress” indicator. It returns to a HIGH state when the REC
pin is pulled HIGH or when the recording is completed due to the memory being filled.
However, during playback, this pin also pulses LOW to indicate an EOM at the end of a
message.
ISD1400 SERIES
- 26 -
Applications Note
Some users may experience an unexpected recording taking place when their circuit is powered up,
or the batteries are changed and VCC rises faster than REC . This undesired recording prevents
playback of the previously recorded message. A spurious End Of Message (EOM) marker appears at
the very beginning of the memory, preventing access to the original message, and nothing is played.
To prevent this occurrence, place a capacitor (approx. 0.001 µF) between the control pin (REC ) and
VCC. This pulls the control pin voltage up with VCC as it rises. Once the voltage is HIGH, the pull-up
device will keep the pin HIGH until intentionally pulled LOW, preventing the false EOM marker.
Since this anomaly depends on factors such as the capacitance of the user’s printed circuit board, not
all circuit designs will exhibit the spurious marker. However, it is recommended that the capacitor is
included for design reliability. A more detailed explanation and resolution of this occurrence is
described in Application Information.
ISD1400 SERIES
Publication Release Date: November 16, 2005
- 27 - Revision 1.3
11. PACKAGE DRAWING AND DIMENSIONS
11.1. 28-LEAD 300 MIL PLASTIC SMALL OUTLINE IC (SOIC)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
12345 67891011 12 13 14
A
D
E
F
B
G
C
H
INCHES MILLIMETERS
Min Nom Max Min Nom Max
A 0.701 0.706 0.711 17.81 17.93 18.06
B 0.097 0.101 0.104 2.46 2.56 2.64
C 0.292 0.296 0.299 7.42 7.52 7.59
D 0.005 0.009 0.0115 0.127 0.22 0.29
E 0.014 0.016 0.019 0.35 0.41 0.48
F 0.050 1.27
G 0.400 0.406 0.410 10.16 10.31 10.41
H 0.024 0.032 0.040 0.61 0.81 1.02
Note: Lead coplanarity to be within 0.004 inches.