Microprocessor Supervisory
Circuit in 4-Lead SC70
Data Sheet ADM6384
Rev. D Document Feedback
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FEATURES
Precision power supply monitoring
31 reset threshold options: 1.58 V to 5.0 V
Four reset timeouts: 1 ms, 20 ms, 140 ms, and 1120 ms
Manual reset input
Reset output stage
Push-pull active-low
Guaranteed reset output valid to VCC = 1 V
Power supply glitch immunity
Specified over the −40°C to +125°C temperature range
4-lead SC70 package
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
The ADM6384 is a supervisory circuit that monitors power supply
voltage levels in microprocessor-based systems. A power-on reset
signal is generated when the supply voltage rises to a preset
threshold level. The debounced manual reset input of the
ADM6384 can be used to initiate a reset by means of an external
push button or logic signal.
The device is available in a choice of 31 reset threshold options,
from 1.58 V to 5.0 V. The minimum reset timeout periods are
1 ms, 20 ms, 140 ms, and 1120 ms.
The ADM6384 is available in a 4-lead SC70 package and typi-
cally consumes only 7 μA, making it suitable for use in low
power, portable applications.
FUNCTIONAL BLOCK DIAGRAMS
ADM6384
V
CC
GND
RESE
T
RESET
GENERATOR
DEBOUNCE
MR
V
REF
05305-001
Figure 1.
RESET RESETMR
GND GND
ADM6384
V
CC
V
CC
MICROPROCESSOR
100kΩ
05305-002
Figure 2.
ADM6384* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
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DOCUMENTATION
Data Sheet
•ADM6384: Microprocessor Supervisory Circuit in 4-Lead
SC70 Data Sheet
REFERENCE MATERIALS
Product Selection Guide
•Supervisory Devices Complementary Parts Guide for
Altera FPGAs
•Supervisory Devices Complementary Parts Guide for
Xilinx FPGAs
Solutions Bulletins & Brochures
•Voltage Monitoring Products Applications Guide
DESIGN RESOURCES
•adm6384 Material Declaration
•PCN-PDN Information
•Quality And Reliability
•Symbols and Footprints
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ADM6384 Data Sheet
Rev. D | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams ............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ..............................................7
Circuit Description............................................................................9
Reset Output ..................................................................................9
Manual Reset Input .......................................................................9
Applications Information .............................................................. 10
Negative-Going VCC Transients ................................................ 10
Ensuring Reset Valid to VCC = 0 V ........................................... 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
REVISION HISTORY
6/2016—Rev. C to Rev. D
Change to Table 3 ............................................................................. 6
Updated Outline Dimensions ....................................................... 11
4/2011—Rev. B to Rev. C
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 11
7/2008—Rev. A to Rev. B
Changes to Figure 5, Figure 8, and Figure 9.................................. 7
Changes to Figure 10 ........................................................................ 8
Changes to Figure 15 ...................................................................... 11
Changes to Ordering Guide .......................................................... 11
1/2007—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changes to Specifications Table ...................................................... 3
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 11
7/2005—Revision 0: Initial Version
Data Sheet ADM6384
Rev. D | Page 3 of 12
SPECIFICATIONS
VCC = full operating range, TA = −40°C to +125°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
SUPPLY
V
CC
Operating Voltage Range
1
5.5
V
Supply Current 7 13 µA VCC = 5.5 V, no load
6 11 µA VCC = 3.6 V, no load
4 7 µA VCC = 2.5 V, no load1
3 6 µA VCC = 1.8 V, no load1
RESET THRESHOLD VOLTAGE
ADM6384x50x 4.88 5.00 5.12 V
ADM6384x49x 4.78 4.90 5.02 V
ADM6384x48x
4.68
4.80
4.92
V
ADM6384x47x 4.58 4.70 4.82 V
ADM6384x46x 4.51 4.63 4.74 V
ADM6384x45x 4.39 4.5 4.61 V
ADM6384x44x 4.27 4.38 4.48 V
ADM6384x43x 4.19 4.30 4.41 V
ADM6384x42x
4.1
4.2
4.31
V
ADM6384x41x 4.0 4.1 4.2 V
ADM6384x40x 3.9 4.0 4.1 V
ADM6384x39x 3.8 3.9 4.0 V
ADM6384x38x 3.71 3.8 3.9 V
ADM6384x37x
3.61
3.7
3.79
V
ADM6384x36x 3.51 3.6 3.69 V
ADM6384x35x 3.41 3.5 3.59 V
ADM6384x34x 3.32 3.4 3.49 V
ADM6384x33x 3.22 3.3 3.38 V
ADM6384x32x 3.12 3.2 3.28 V
ADM6384x31x
3.00
3.08
3.15
V
ADM6384x30x 2.93 3.0 3.08 V
ADM6384x29x 2.85 2.93 3.00 V
ADM6384x28x 2.73 2.8 2.87 V
ADM6384x27x 2.63 2.70 2.77 V
ADM6384x26x 2.56 2.63 2.69 V
ADM6384x25x 2.44 2.5 2.56 V
ADM6384x24x 2.34 2.4 2.46 V
ADM6384x23x 2.26 2.31 2.37 V
ADM6384x22x 2.13 2.19 2.24 V
ADM6384x17x 1.62 1.67 1.71 V
ADM6384x16x
1.54
1.58
1.61
V
RESET THRESHOLD TEMPERATURE COEFFICIENT 60 ppm/°C
VCC to Reset Delay 35 µs VCC falling at 10 mV/µs from VTH +
100 mV to VTH − 100 mV
RESET THRESHOLD HYSTERESIS 2 × VTH mV
RESET TIMEOUT PERIOD
ADM6384xxD1 1 2 ms
ADM6384xxD2 20 40 ms
ADM6384xxD3 140 280 ms
ADM6384xxD4 1120 2240 ms
ADM6384 Data Sheet
Rev. D | Page 4 of 12
Parameter Min Typ Max Unit Test Conditions/Comments
MANUAL RESET INPUT
MR Input Threshold
VIL 0.3 × VCC V VCC < 4 V
0.8 V VCC > 4 V
VIH 0.7 × VCC V VCC < 4 V
2.4 V VCC > 4 V
MR Input Pulse Width 1 µs
MR Glitch Rejection 100 ns
MR Pull-Up Resistance 32 63 100 kV
MR to Reset Delay 200 ns
RESET OUTPUT VOLTAGE
VOL 0.3 V VCC ≥ 1.0 V, ISINK = 80 µA
0.3 V VCC ≥ 2.5 V, ISINK = 1.2 mA
0.4
V
V
CC
≥ 4.5 V, I
SINK
= 3.2 mA
VOH 0.8 × VCC V VCC ≥ 2.5 V, ISOURCE = 500 µA
0.8 × VCC V VCC ≥ 4.5 V, I SOURCE = 800 µA
1 TA = 25°C only.
Data Sheet ADM6384
Rev. D | Page 5 of 12
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 2.
Parameter Rating
VCC −0.3 V to +6 V
RESET −0.3 V to +6 V
Output Current (RESET) 20 mA
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
θJA Thermal Impedance, SC70 331°C/W
Soldering Temperature
Sn/Pb
240°C, 30 sec
Pb-Free 260°C, 40 sec
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
ADM6384 Data Sheet
Rev. D | Page 6 of 12
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
GND
1
RESET
2
V
CC
4
MR
3
ADM6384
TOP VIEW
(Not to Scale)
05305-003
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 GND Ground.
2 RESET Active-Low Reset Output. This is an active-low output that is asserted whenever VCC is
below the reset threshold (VTH). It features a push-pull output stage.
3 MR Manual Reset Input. This is an active-low input that, when forced low for at least 1 μs,
generates a reset. It features a 52 kΩ internal pull-up.
4 VCC Power Supply Voltage Being Monitored.
Data Sheet ADM6384
Rev. D | Page 7 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
05305-004
TEMPERATURE (°C)120–40 –20 020 40 60 80 100
I
CC
(µA)
10.0
9.5
7.5
7.0
6.5
9.0
8.5
8.0
6.0
5.5
5.0
4.5
4.0
3.5
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 1.5V
Figure 4. Supply Current vs. Temperature
05305-005
TEMPERATURE (°C) 120–40 0–20 4020 100
8060
NORMALIZED RESET TIMEOUT (ms)
1.20
1.15
1.10
1.05
0.95
1.00
0.90
0.85
0.80
Figure 5. Normalized Reset Timeout Period vs. Temperature
05305-006
TEMPERATURE (°C) 120–40 0–20 4020 1008060
V
CC
TO RESET OUTPUT DELAY (µs)
100
90
80
60
70
40
50
20
10
30
0
Figure 6. VCC to Reset Output Delay vs. Temperature
05305-007
TEMPERATURE (°C) 120–40 0–20 40
20 100
8060
NORM ALIZED RE S ET T HRE S HOL D ( V )
1.05
1.03
1.04
1.01
1.02
0.99
1.00
0.97
0.98
0.95
0.96
Figure 7. Normalized Reset Threshold vs. Temperature
05305-008
ISINK (mA) 70123456
VOL (V)
0.20
0.15
0.10
0.05
0
VCC = 2.9V
Figure 8. Output Voltage Low vs. ISINK
05305-009
ISOURCE (mA) 1.000.2 0.4 0.6 0.8
VOH (V)
2.92
2.90
2.88
2.86
2.84
2.82
VCC = 2.9V
Figure 9. Output Voltage High vs. ISOURCE
ADM6384 Data Sheet
Rev. D | Page 8 of 12
05305-010
OVERDRIVE V
OD
(mV) 100010 100
MAXIMUM V
CC
TRANSIENT DUR ATION (µs)
160
120
140
100
60
80
40
20
0
V
TH
= 4.63V
V
TH
= 2.93V
RESET O CCURS ABOVE CURVE
Figure 10. Maximum VCC Transient Duration vs. Reset Threshold Overdrive
05305-011
TEMPERATURE (°C)
–40 –20 020 40 60 80 100 120
MANUAL RESET TO RESET DELAY (ns)
340
280
320
300
260
220
240
200
180
160
140
120
100
V
CC
= 3.3V
V
CC
= 5V
Figure 11. Manual Reset Minimum Pulse Width vs. Temperature
Data Sheet ADM6384
Rev. D | Page 9 of 12
CIRCUIT DESCRIPTION
The ADM6384 provides microprocessor supply voltage supervi-
sion by controlling the microprocessor reset input. Code execution
errors are avoided during power-up, power-down, and brownout
conditions by asserting a reset signal when the supply voltage is
below a preset threshold. In addition, the ADM6384 allows
supply voltage stabilization with a fixed timeout before the reset
deasserts after the supply voltage rises above the threshold. If the
user detects a problem with the system operation, a manual reset
input is available to reset the microprocessor by means of an
external push-button, for example.
RESET OUTPUT
The ADM6384 features an active-low, push-pull reset output.
The reset signal is guaranteed to be logic low for VCC down to 1 V.
The reset output is asserted when VCC is below the reset threshold
(VTH) or when MR is driven low. Reset remains asserted for the
duration of the reset active timeout period (tRP) after VCC rises
above the reset threshold or after MR transitions from low to high.
Figure 12 illustrates the behavior of the reset outputs.
VCC
1V
VCC
0V
VTH VTH
0V
VCC
RESET
t
RD
t
RP
05305-012
Figure 12. Reset Timing Diagram
MANUAL RESET INPUT
The ADM6384 features a manual reset input (MR) that, when
driven low, asserts the reset output. When MR transitions from
low to high, reset remains asserted for the duration of the reset
active timeout period before deasserting. The MR input has a
52 kΩ internal pull-up so that the input is always high when
unconnected. An external push-button switch can be connected
between MR and ground so that the user can generate a reset.
Debounce circuitry for this purpose is integrated on-chip. Noise
immunity is provided on the MR input, and fast, negative-going
transients of up to 100 ns (typical) are ignored. A 0.1 µF capacitor
between MR and ground provides additional noise immunity.
ADM6384 Data Sheet
Rev. D | Page 10 of 12
APPLICATIONS INFORMATION
NEGATIVE-GOING VCC TRANSIENTS
To avoid unnecessary resets caused by fast power supply tran-
sients, the ADM6384 is equipped with glitch rejection circuitry.
The typical performance characteristic shown in Figure 10 plots
VCC transient duration vs. the transient magnitude. The curves
show combinations of transient magnitude and duration for which
a reset is not generated for 4.63 V and 2.93 V reset threshold
devices. For example, with the 2.93 V threshold, a transient that
goes 100 mV below the threshold and lasts 8 µs typically does not
cause a reset, but if the transient is any greater in magnitude or
duration, a reset is generated. An optional 0.1 µF bypass capacitor
mounted close to VCC provides additional glitch rejection.
ENSURING RESET VALID TO VCC = 0 V
Both active-low and active-high reset outputs are guaranteed to
be valid for VCC as low as 1 V. However, by using an external
resistor with push-pull configured reset outputs, valid outputs
for VCC as low as 0 V are possible. For an active-low reset out-
put, a resistor connected between RESET and ground pulls the
output low when it is unable to sink current. Use a large
resistance such as 100 kΩ to avoid overloading the reset
output when VCC is above 1 V.
RESET
GND
ADM6384
100kΩ
05305-013
V
CC
Figure 13. Ensuring Reset Valid to VCC = 0 V
Data Sheet ADM6384
Rev. D | Page 11 of 12
OUTLINE DIMENSIONS
*PACKAGE OUT LI NE CORRES P ONDS I N FUL L T O EI AJ S C82
EXCEP T F OR W IDTH OF P IN 2 AS SHOW N.
*0.70
0.50
0.10 MAX
1.00
0.80 1.10
0.80
0.40
0.10
0.18
0.10 0.30
0.10
0.50 BSC
0.65
BSC 0.65
BSC
2.20
1.80
2.40
1.80
1.35
1.15
COPLANARITY
0.10
SEATING
PLANE
0.30
0.15
03-04-2014-B
PIN 1
INDICATOR
4 3
21
Figure 14. 4-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-4)
Dimensions shown in millimeters
ORDERING QUANTITY
RL7: 3,000 PI E CE RE EL
R7: 3, 000 PIECE RE EL Ro HS COMPLI ANT
Z: RoHS CO M P LI ANT
RESET TIMEOUT PERIOD
1: 1ms (M IN)
2: 20ms (M IN)
3: 140ms (M IN)
4: 1120ms (MIN)
GENE RIC NUMBE R
TEMPERATURE RANG E
Y: –40°C TO +125° C
PACKAGE CO DE
KS: 4- LEAD SC70
RESET T HRE S HOLD NUM BE R
(16 TO 50)
05305-014
ADM6384YKSxDxx-RL7
Figure 15. Ordering Code Structure
ORDERING GUIDE
Standard Models1, 2
Reset
Threshold (V)
Reset
Timeout (ms)
Temperature
Range
Package
Description
Package
Option
Ordering
Quantity Branding
ADM6384YKS23D3Z-R7 2.31 140 −40°C to +125°C 4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS26D3Z-R7 2.63 140 −40°C to +125°C
4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS29D1Z-R7 2.93 1 −40°C to +125°C 4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS29D3Z-R7 2.93 140 −40°C to +125°C 4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS31D1Z-R7 3.08 1 −40°C to +125°C 4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS31D2Z-R7
3.08
20
−40°C to +125°C
4-Lead SC70
KS-4
3,000
N0R
ADM6384YKS34D2Z-R7 3.4 20 −40°C to +125°C
4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS39D2Z-R7 3.9 20 −40°C to +125°C
4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS45D3Z-R7 4.5 140 −40°C to +125°C
4-Lead SC70 KS-4 3,000 N0R
ADM6384YKS46D2Z-R7 4.63 20 −40°C to +125°C
4-Lead SC70 KS-4 3,000 N0R
1 If ordering nonstandard models, complete the ordering code shown in Figure 15 by inserting reset timeout and reset threshold suffixes. Contact sales for availability of
nonstandard models.
2 Z = RoHS Compliant Part.
