NTE1693
Integrated Circuit
Telephone Pulse Dialer (CMOS)
Description:
The NTE1693 is a CMOS LSI pulse dialer in a 16–Lead DIP type package with redial which integrates
a ceramic resonator as a frequency reference.
Features:
DMake Ratio: 33/39% Pin–Selectable.
DPulse Output: “1” True
DMute Output: “0” True
D17–Digit Redial with either * or # Input
DUses a Ceramic Oscillator as a Frequency Reference
DDirect Telephone Line Operation
DUses either a Standard 2–of–7 Matrix Keyboard or a Single Contact Keyboard
DMute Signal Generated on Pulse Signal
Absolute Maximum Ratings:
Supply Voltage (Note 1), VDD –0.3 to +6.2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Pin Voltage
VIN1 (Note 2) –0.3V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIN2 (Note 3) +0.3V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Power Dissipation (TA = +25°C), PD500mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, Topr –30° to +60°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Referenced to GND
Note 2. The maximum applicable voltage or any pin with respect to GND
Note 3. The maximum applicable voltage on any pin with respect to VDD
Recommended Operating Conditions:
Supply Voltage, VDD 2.5 to 6.0V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Characteristics: (TA = –30° to +60°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Key Contact Resistance RKI – – 1 kΩ
Keyboard Capacitance CKI – – 30 pF
Input Voltage K1H 2–of–7 input mode, Note 4 0.8VDD –VDD V
GND –0.2VDD V
Key Pull–Up Resistance KIRU VDD = 6.0V, VIN = 4.8V –4–kΩ
Key Pull–Down Resistance KIRD –100 –kΩ
MUTE Sink Current IMVDD = 2.5V, VOUT = 0.5V, Note 5 500 – – µA
Pulse Output Sink Current IPVDD = 2.5V, VOUT = 0.5V, Note 6 1.0 – – mA
VDD–VRFF Value VREF ISUPPLY = 150µA, Note 7 1.5 2.5 3.5 V
Memory Retention Current IMR All outputs in no–load state –0.7 –µA
Operating Current IOP All outputs in no–load state –100 150 µA
MUTE, PULSE Leakage ILKG VDD = 6.0V, VOUT = 6.0V, Note 5, Note 6 –0.001 1 µA
Note 4. Applies to key input pins (ROW1–ROW4 COL1–COL3)
Note 5. Applies to MUTE output pin.
Note 6. Applies to PULSE output pin
Note 7. Applies to VREF pin.
AC Electrical Characteristics:
Parameter Symbol Test Conditions Min Typ Max Unit
Oscillator Frequency fOSC Note 8 –480 –kHz
Keyboard Debounce Time tDB –10 –ms
Time for Valid Key Entry tKD 40 – – ms
Oscillator Start–Up Time tON Note 9 –6–ms
Pulse Rate PR–10 –pps
Break Time tBPin9 tied to V+ –61 –ms
Pin9 tied to V– – 67 –ms
Inter–Digital Pause tIDP –800 –ms
Note 8. Typical values are exact with a nominal 480kHz frequency reference (except for oscillator
start–up time)
Note 9. Ceramic resonator should have the following equivalent values: R < 20Ω, RA ≥ 70kΩ, CO
≤ 500pF.
Mute Output
Pin Connection Diagram
Vref
VCC Pulse Output
Row 3
On–Hook/Test
Row 4
OSC Input Make/Break Select
Row 2
OSC Output
Column 1
GND
Column 3
Row 1
Column 2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
.260 (6.6) Max
16 9
18
.785 (19.9) Max
.200
(5.08)
Max
.245
(6.22)
Min
.300 (7.62)
.700 (17.7)
.100 (2.54)
