ADM6322A43ARJ-RL - Analog Devices, Inc.

Supervisory Circuits with Watchdog

and Manual Reset in 5-Lead SOT-23

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 www.analog.com

FEATURES

26 reset threshold options:

2.5 V to 5 V in 100 mV increments

4 reset timeout options:

1 ms, 20 ms, 140 ms, and 1120 ms (Min)

4 watchdog timeout options:

6.3 ms, 102 ms, 1600 ms, and 25.6s (Typ)

Manual reset input

Reset output stages:

Push-pull active-low

Open-drain active-low

Push-pull active-high

Low power consumption (3 µA)

Guaranteed reset output valid to VCC = 1 V

Power supply glitch immunity

Specified over industrial temperature range

5-lead SOT-23 package

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Portable equipment

FUNCTIONAL BLOCK DIAGRAM

ADM6316

GND WDI

RESET

GENERATOR

WATCHDOG

DETECTOR

DEBOUNCE

REF

04533-0-001

Figure 1.

GENERAL DESCRIPTION

The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/

ADM6321/ADM6322 are supervisory circuits which monitor

power supply voltage levels and code execution integrity in

microprocessor-based systems. As well as providing power on

reset signals, an on-chip watchdog timer can reset the

microprocessor if it fails to strobe within a preset timeout

period. A reset signal can also be asserted by means of an

external push-button, through a manual reset input. The seven

parts feature different combinations of watchdog input, manual

reset input and output stage configuration, as shown in Table 1.

Each part is available in a choice of 26 reset threshold options

ranging from 2.5 V to 5 V in 100 mV increments. There are also

four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms

(min) and four watchdog timeout options of 6.3 ms, 102 ms,

1600 ms, and 25.6s (typ).

The ADM6316-ADM6322 are available in 5-lead SOT-23

packages and typically consume only 3 µA, making them

suitable for use in low power portable applications.

Table 1. Selection Table

Output Stage

Part No. Watchdog Manual Reset RESET RESET

ADM6316 Yes Yes Push-Pull –

ADM6317 Yes Yes – Push-Pull

ADM6318 Yes – Push-Pull Push-Pull

ADM6319 – Yes Push-Pull Push-Pull

ADM6320 Yes Yes Open-Drain –

ADM6321 Yes - Open-Drain Push-Pull

ADM6322 – Yes Open-Drain Push-Pull

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 2 of 11

TABLE OF CONTENTS

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 5

ESD Caution.................................................................................. 5

Pin Configurations and Function Descriptions ........................... 6

Typical Performance Characteristics ..............................................7

Outline Dimensions....................................................................... 10

Ordering Guide .......................................................................... 11

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 3 of 11

SPECIFICATIONS

VCC = full operating range, TA = TMIN to TMAX, unless otherwise noted.

Table 2.

Parameter Min Typ Max Unit Test Conditions/Comments

SUPPLY

VCC Operating Voltage Range 1 5.5 V

Supply Current 10 20 µA VCC = 5.5 V

5 12 µA VCC = 3.6 V

RESET THRESHOLD VOLTAGE

VTH −

1.5%

VTH VTH +

1.5%

V TA = +25°C

VTH −

2.5%

VTH VTH +

2.5%

V TA = −40°C to +85°C

RESET THRESHOLD TEMPERATURE COEFFICIENT 40 ppm/°C

RESET THRESHOLD HYSTERESIS 3 mV

RESET TIMEOUT PERIOD

ADM63__A 1 1.4 2 ms

ADM63__B 20 28 40 ms

ADM63__C 140 200 280 ms

ADM63__D 1120 1600 2240 ms

VCC TO RESET DELAY 40 µs VCC falling at 1 mV/µs

PUSH-PULL OUTPUT (ADM6316, ADM6317, ADM6318,

ADM6319, ADM6321, ADM6322)

RESET Output Voltage 0.3 V VCC> = 1.0 V, ISINK = 50 µA

0.3 V VCC> = 1.2 V, ISINK = 100 µA

0.3 V VCC> = 2.7 V, ISINK = 1.2 mA

0.4 V VCC> = 4.5 V, ISINK = 3.2 mA

0.8 × VCC V V

CC> = 2.7 V, ISOURCE = 500 µA

CC − 1.5 V VCC> = 4.5 V, I SOURCE = 800 µA

RESET Rise Time 5 25 ns

From 10% to 90% VCC, CL = 5 pF,

VCC = 3.3 V

RESET Output Voltage 0.3 V VCC > = 2.7 V, ISINK = 1.2 mA

0.4 V VCC > = 4.5 V, ISINK = 3.2 mA

0.8 × VCC V V

CC > = 1.8 V, ISOURCE = 150 µA

0.8 × VCC V V

CC > = 2.7 V, ISOURCE = 500 µA

CC – 1.5 VCC > = 4.5 V, I SOURCE = 800 µA

OPEN-DRAIN OUTPUT (ADM6320, ADM6321,

ADM6322)

RESET Output Voltage 0.3 V VCC > = 1.0 V, ISINK = 50 µA

0.3 V VCC > = 1.2 V, ISINK = 100 µA

0.3 V VCC > = 2.7 V, ISINK = 1.2 mA

0.4 V VCC > = 4.5 V, ISINK = 3.2 mA

Open-Drain Reset Output Leakage Current 1 µA

WATCHDOG INPUT (ADM6316, ADM6317, ADM6318,

ADM6320, ADM6321)

Watchdog Timeout Period 4.3 6.3 9.3 ms ADM63___W

71 102 153 ms ADM63___X

1.12 1.6 2.4 s ADM63___Y

17.9 25.6 38.4 s ADM63___Z

WDI Pulse Width 50 ns VIL = 0.3 × VCC, VIH = 0.7 × VCC,

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 4 of 11

Parameter Min Typ Max Unit Test Conditions/Comments

WDI Input Threshold 0.3 × VCC V

0.7 × VCC V

WDI Input Current 120 160 µA VWDI = VCC, time average

−20 −15 µA VWDI = 0, time average

MANUAL RESET INPUT (ADM6316, ADM6317,

ADM6319, ADM6320, ADM6322)

MR Input Threshold 0.8 V VTH > 4.0 V

2.0 V VTH > 4.0 V

0.3 × VCC V V

TH <4.0 V

0.7 × VCC V VTH < 4.0 V

MR Input Pulse Width 1 µs

MR Glitch Rejection 100 ns

MR Pull-up Resistance 35 52 75 k⍀

MR to Reset Delay 230 ns VCC = 5V

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 5 of 11

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 3.

Parameter Rating

VCC –0.3 V to +6 V

RESET (ADM6320, ADM6321, ADM6322) –0.3 V to +6 V

Output Current (RESET, RESET) 20 mA

Operating Temperature Range –40°C to +85°C

Storage Temperature Range –65°C to +125°C

θJA Thermal Impedance, SOT-23 270°C/W

Lead Temperature

Soldering (10 sec) 300°C

Vapour Phase (60 sec) 215°C

Infrared (15 sec) 220°C

Stresses above those listed under Absolute Maximum Ratings

may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these or

any other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect

device reliability.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the

human body and test equipment and can discharge without detection. Although this product features

proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy

electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance

degradation or loss of functionality.

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 6 of 11

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

ADM6316/

ADM6320

TOP VIEW

(Not to Scale)

RESET

GND

WDI

04533-0-002

Figure 2. ADM6316/ADM6320 Pin Configuration

ADM6317

TOP VIEW

(Not to Scale)

RESET

GND

WDI

04533-0-003

Figure 3. ADM6317 Pin Configuration

ADM6318/

ADM6321

TOP VIEW

(Not to Scale)

RESET

GND

RESET

WDI

04533-0-004

Figure 4. ADM6318/ADM6321 Pin Configuration

ADM6319/

ADM6322

TOP VIEW

(Not to Scale)

RESET

GND

RESET

04533-0-004

Figure 5. ADM6319/ADM6322 Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 RESET (ADM6316/ADM6318/

ADM6319/ADM6320/ADM6321/

ADM6322)

Active-Low Reset Output. Asserted whenever VCC is below the reset threshold, VTH.

Push-Pull Output Stage for the ADM6316/ADM6318/ADM6319.

Open-Drain Output Stage for the ADM6320/ADM6321/ADM6322.

RESET (ADM6317) Active-High, Push-Pull Reset Output.

2 GND Ground.

3 MR (ADM6316/ADM6317/

ADM6320)

Manual Reset Input. This is an active-low input which, when forced low for at least 1 µs,

generates a reset. It features a 52 k⍀ internal pull-up.

RESET (ADM6318/ADM6319/

ADM6321/ADM6322)

Active-High, Push-Pull Reset Output.

4 WDI

(ADM6316/ADM6317/

ADM6318/ADM6320/ADM6321)

Watchdog Input. Generates a reset if the logic level on the pin remains low or high for

the duration of the watchdog timeout. The timer is cleared if a logic transition occurs on

this pin or if a reset is generated. Leave floating to disable the watchdog timer.

MR (ADM6319/ADM6322) Manual Reset Input.

5 VCC Power Supply Voltage Being Monitored.

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 7 of 11

TYPICAL PERFORMANCE CHARACTERISTICS

04533-0-006

TEMPERATURE (°C)

–40–200 20406080

(µA)

10.0

9.0

9.5

8.0

7.5

8.5

7.0

6.5

6.0

5.5

5.0

4.5

4.0

3.5

= 5V

= 3V

= 1.5V

Figure 6. Supply Current vs. Temperature

(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)

04533-0-007

(V)

5.50 2.01.51.00.5 2.5 3.0 3.5 4.0 4.5 5.0

(µA)

Figure 7. Supply Current vs. Supply Voltage

04533-0-008

TEMPERATURE (°C)

–40 40200–20 60 80

NORMALIZED RESET THRESHOLD

1.05

1.03

1.04

1.01

1.00

1.02

0.99

0.98

0.97

0.96

0.95

Figure 8. Normalized Reset Threshold vs. Temperature

04533-0-009

TEMPERATURE (°C)

–40 40200–20 60 80

TO RESET DELAY (µs)

100

Figure 9. VCC Falling to Reset Propagation Delay vs. Temperature

04533-0-010

TEMPERATURE (°C)

–40 40200–20 60 80

MANUAL RESET TO RESET DELAY (ns)

340

300

320

260

240

280

220

200

180

160

140

120

100

Figure 10. Manual Reset to Reset Propagation Delay vs. Temperature

(ADM6316/ADM6317/ADM6319/ADM6320/ADM6322)

04533-0-011

TEMPERATURE (°C)

–40 40200–20 60 80

NORMALIZED RESET TIMEOUT

1.20

1.10

1.15

1.00

0.95

1.05

0.90

0.85

0.80

Figure 11. Normalized Reset Timeout Period vs. Temperature

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 8 of 11

04533-0-012

TEMPERATURE (°C)

–40 6040 80200–20

NORMALIZED WATCHDOG TIMEOUT

1.20

1.15

1.10

1.05

1.00

0.95

0.90

Figure 12. Normalized Watchdog Timeout Period vs. Temperature

(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)

04533-0-013

OVER DRIVE VOD (mV)

100010 100

MAXIMUM TRANSIENT DURATION (µs)

160

120

140

100

= 4.9V

= 2.93V

Figure 13. Maximum VCC Transient Duration vs. Reset Threshold Overdrive

04533-0-014

TEMPERATURE (°C)

–50 0 50

MR MINIMUM PULSE WIDTH (ns)

190

160

180

170

150

130

140

120

110

100

Figure 14. Manual Reset Minimum Pulse Width vs. Temperature

(ADM6316/ADM6317/ADM6319/ADM6320/ADM6322)

04333-0-015

TEMPERATURE (°C)

–40 10 60

MINIMUM PULSE WIDTH (ns)

3.8

3.2

3.6

3.4

3.0

2.6

2.8

2.4

2.2

2.0

NEGATIVE PULSE

POSITIVE PULSE

Figure 15. Watchdog Input Minimum Pulse Width vs. Temperature

(ADM6316/ADM6317/ADM6318/ADM6320/ADM6321)

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 9 of 11

Table 5. Reset Threshold Options

Table 6. Reset Timeout Options

Suffix Min Typ Max Unit

A 1 1.6 2 ms

B 20 30 40 ms

C 140 200 280 ms

D 1.12 1.60 2.24 s

Table 7. Watchdog Timer Operations

Suffix Min Typ Max Unit

W 4.3 6.3 9.3 ms

X 71 102 153 ms

Y 1.12 1.6 2.24 s

Z 17.9 25.6 38.4 s

Table 8. Standard Models

TA = +25°C TA = −40°C to +85°C

Part No. Min Typ Max Min Max

ADM63 _ _ _ 50 4.925 5.000 5.075 4.875 5.125

ADM63 _ _ _ 49 4.827 4.900 4.974 4.778 5.023

ADM63 _ _ _ 48 4.728 4.800 4.872 4.680 4.920

ADM63 _ _ _ 47 4.630 4.700 4.771 4.583 4.818

ADM63 _ _ _ 46 4.561 4.630 4.699 4.514 4.746

ADM63 _ _ _ 45 4.433 4.500 4.568 4.388 4.613

ADM63 _ _ _ 44 4.314 4.390 4.446 4.270 4.490

ADM63 _ _ _ 43 4.236 4.300 4.365 4.193 4.408

ADM63 _ _ _ 42 4.137 4.200 4.263 4.095 4.305

ADM63 _ _ _ 41 4.039 4.100 4.162 3.998 4.203

ADM63 _ _ _ 40 3.940 4.00 4.060 3.900 4.100

ADM63 _ _ _ 39 3.842 3.900 3.959 3.803 3.998

ADM63 _ _ _ 38 3.743 3.800 3.857 3.705 3.895

ADM63 _ _ _ 37 3.645 3.700 3.756 3.608 3.793

ADM63 _ _ _ 36 3.546 3.600 3.654 3.510 3.690

ADM63 _ _ _ 35 3.448 3.500 3.553 3.413 3.588

ADM63 _ _ _ 34 3.349 3.400 3.451 3.315 3.485

ADM63 _ _ _ 33 3.251 3.300 3.350 3.218 3.383

ADM63 _ _ _ 32 3.152 3.200 3.248 3.120 3.280

ADM63 _ _ _ 31 3.034 3.080 3.126 3.003 3.157

ADM63 _ _ _ 30 2.955 3.000 3.045 2.925 3.075

ADM63 _ _ _ 29 2.886 2.930 2.974 2.857 3.000

ADM63 _ _ _ 28 2.758 2.800 2.842 2.730 2.870

ADM63 _ _ _ 27 2.660 2.700 2.741 2.633 2.768

ADM63 _ _ _ 26 2.591 2.630 2.669 2.564 2.696

ADM63 _ _ _ 25 2.463 2.500 2.538 2.438 2.563

Model Reset Threshold (V) Minimum Reset Timeout (ms) Typical Watchdog Timeout (s)

ADM6316CY29ARJ 2.93 140 1.6

ADM6316CY46ARJ 4.63 140 1.6

ADM6318CY46ARJ 4.63 140 1.6

ADM6319C46ARJ 4.63 140 1.6

ADM6320CY29ARJ 2.93 140 1.6

ADM6320CY46ARJ 4.63 140 1.6

ADM6321CY46ARJ 4.63 140 1.6

ADM6322C46ARJ 4.63 140 1.6

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 10 of 11

OUTLINE DIMENSIONS

PIN 1

1.60 BSC 2.80 BSC

1.90

BSC

0.95 BSC

4 5

0.22

0.08

10°

5°

0°

0.50

0.30

0.15 MAX SEATING

PLANE

1.45 MAX

1.30

1.15

0.90

2.90 BSC

0.60

0.45

0.30

COMPLIANT TO JEDEC STANDARDS MO-178AA

Figure 16. 5-Lead Small Outline Transistor Package [SOT-23]

(RJ-5)

Dimensions shown in millimeters

PRELIMINARY TECHNICAL DATA

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

Rev.PrC | Page 11 of 11

ORDERING GUIDE

ADM63__ __ __ __ A RJ - __

Generic No.

(16 - 22)

Temperature Range:

A: -40 C to +85C

Package Code:

RJ: 5-Lead SOT-23

Reset Threshold No.

(25 - 50)

Reset Timeout Period

A: 1ms (min)

B: 20ms (min)

C: 140ms (min)

D: 1120ms (min)

Watchdog Timeout Period

W: 6.3ms (typ)

X: 102ms (typ)

Y: 1.6s (typ)

Z: 25s (typ)

Ordering Quantity:

RL7: 10,000 piece Reel

RL: 3,000 piece Reel

Figure 17. Ordering Code Structure

1 Complete the ordering code by inserting reset timeout, watchdog timeout (ADM6316/17/18/20/21) and reset threshold suffixes from tables 5 to 7.

2 Contact the factory for the availability of nonstandard models. See Table 8 for a list of standard models.

Model12 Temperature Range Quantity Package Option Branding

ADM6316 _ _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N00

ADM6317 _ _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N01

ADM6318 _ _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N02

ADM6319 _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N03

ADM6320 _ _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N04

ADM6321 _ _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N05

ADM6322 _ __ ARJ-RL7 −40°C to +85°C 3k SOT-23-5 N06

registered trademarks are the property of their respective owners.

A: -40°C to +85°C

PRELIMINARY TECHNICAL DATA

PR04533-0-6/04(PrC)