ADM693ANZ Analog Devices Inc, ADM693ANZ Datasheet

no-image

ADM693ANZ

Manufacturer Part Number
ADM693ANZ
Description
IC,Power Supply Supervisor,CMOS,DIP,16PIN,PLASTIC
Manufacturer
Analog Devices Inc
Type
Battery Backup Circuitr
Datasheet

Specifications of ADM693ANZ

Number Of Voltages Monitored
1
Output
Open Drain, Push-Pull
Reset
Active High/Active Low
Reset Timeout
35 ms Minimum
Voltage - Threshold
4.4V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADM693ANZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
GENERAL DESCRIPTION
The ADM690–ADM695 family of supervisory circuits offers
complete single chip solutions for power supply monitoring and
battery control functions in microprocessor systems. These
functions include P reset, backup battery switchover, watchdog
timer, CMOS RAM write protection, and power failure warn-
ing. The complete family provides a variety of configurations to
satisfy most microprocessor system requirements.
The ADM690, ADM692 and ADM694 are available in 8-pin
DIP packages and provide:
1. Power-on reset output during power-up, power-down and
2. Battery backup switching for CMOS RAM, CMOS
3. A reset pulse if the optional watchdog timer has not been
4. A 1.3 V threshold detector for power fail warning, low battery
The ADM691, ADM693 and ADM695 are available in 16-pin
DIP and small outline packages and provide three additional
functions.
1. Write protection of CMOS RAM or EEPROM.
2. Adjustable reset and watchdog timeout periods.
3. Separate watchdog timeout, backup battery switchover, and
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
brownout conditions. The RESET output remains opera-
tional with V
microprocessor or other low power logic.
toggled within a specified time.
detection, or to monitor a power supply other than +5 V.
low V
FEATURES
Superior Upgrade for MAX690–MAX695
Specified Over Temperature
Low Power Consumption (5 mW)
Precision Voltage Monitor
Reset Assertion Down to 1 V V
Low Switch On-Resistance 1.5
High Current Drive (100 mA)
Watchdog Timer—100 ms, 1.6 s, or Adjustable
600 nA Standby Current
Automatic Battery Backup Power Switching
Extremely Fast Gating of Chip Enable Signals (5 ns)
Voltage Monitor for Power Fail
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
20
CC
in Backup
status outputs.
CC
as low as 1 V.
CC
Normal,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
The ADM690–ADM695 family is fabricated using an advanced
epitaxial CMOS process combining low power consumption
(5 mW), extremely fast Chip Enable gating (5 ns) and high reli-
ability. RESET assertion is guaranteed with V
In addition, the power switching circuitry is designed for mini-
mal voltage drop thereby permitting increased output current
drive of up to 100 mA without the need for an external pass
transistor.
POWER FAIL
POWER FAIL
WATCHDOG
WATCHDOG
INPUT (WDI)
INPUT (WDI)
INPUT (PFI)
INPUT (PFI)
OSC SEL
OSC IN
V
V
CE
BATT
BATT
V
V
CC
CC
IN
FUNCTIONAL BLOCK DIAGRAMS
1
2
1
4.65V
4.65V
VOLTAGE DETECTOR = 4.65V (ADM690, ADM694)
RESET PULSE WIDTH = 50ms (ADM690, ADM692)
VOLTAGE DETECTOR = 4.65V (ADM691, ADM695)
1.3V
1.3V
TRANSITION DETECTOR
WATCHDOG
TIMEBASE
TRANSITION DETECTOR
RESET &
1
1
WATCHDOG
WATCHDOG
Supervisory Circuits
(1.6s)
ADM690–ADM695
BATT ON
GENERATOR
GENERATOR
RESET
200ms (ADM694)
Microprocessor
4.40V (ADM692)
4.40V (ADM693)
RESET
WATCHDOG
© Analog Devices, Inc., 1996
ADM690
ADM692
ADM694
TIMER
2
ADM691
ADM693
ADM695
CC
Fax: 617/326-8703
as low as 1 V.
V
RESET
POWER FAIL
OUTPUT (PFO)
V
CE
RESET
RESET
WATCHDOG
OUTPUT (WDO)
POWER FAIL
OUTPUT (PFO)
LOW LINE
OUT
OUT
OUT

Related parts for ADM693ANZ

ADM693ANZ Summary of contents

Page 1

FEATURES Superior Upgrade for MAX690–MAX695 Specified Over Temperature Low Power Consumption (5 mW) Precision Voltage Monitor Reset Assertion Down Low Switch On-Resistance 1 Backup High Current Drive (100 mA) Watchdog Timer—100 ms, 1.6 ...

Page 2

ADM690–ADM695–SPECIFICATIONS Parameter BATTERY BACKUP SWITCHING V Operating Voltage Range CC ADM690, ADM691, ADM694, ADM695 ADM692, ADM693 V Operating Voltage Range BATT ADM690, ADM691, ADM694, ADM695 ADM692, ADM693 V Output Voltage OUT V in Battery Backup Mode OUT Supply Current (Excludes ...

Page 3

Parameter OSCILLATOR OSC IN Input Current OSC SEL Input Pull-Up Current OSC IN Frequency Range OSC IN Frequency with External Capacitor NOTE 1 WDI is a three level input which is internally biased to 38 Specifications subject to ...

Page 4

ADM690–ADM695 Mnemonic Function V Power Supply Input Nominal Backup Battery Input. Connect to Ground if a backup battery is not used. BATT V Output Voltage OUT CC can supply up to 100 mA ...

Page 5

V 1 BATT V 2 OUT ADM691 V 3 ADM693 CC ADM695 GND 4 TOP VIEW 5 BATT ON (Not to Scale) LOW LINE 6 OSC IN 7 OSC SEL 8 Part Nominal Reset Nominal V Number Time Reset Threshold ...

Page 6

ADM690–ADM695 POWER FAIL RESET OUTPUT RESET is an active low output which provides a RESET signal to the Microprocessor whenever invalid level. When CC V falls below the reset threshold, the RESET output is forced CC ...

Page 7

Table I. ADM691, ADM693, ADM695 Reset Pulse Width and Watchdog Timeout Selections OSC SEL OSC IN Low External Clock Input Low External Capacitor Floating or High Low Floating or High Floating or High NOTE With the OSC SEL pin low, ...

Page 8

ADM690–ADM695 CE Gating and RAM Write Protection (ADM691/ADM693/ ADM695) The ADM691/ADM693/ADM695 products include memory protection circuitry which ensures the integrity of data in mem- ory by preventing write operations when V level. There are two additional pins, CE may be ...

Page 9

+ 4.95 4.90 SLOPE = 1.5 4.85 4. 100 I – mA OUT Figure 8. V vs. I Normal OUT OUT Operation 1.303 1.302 1.301 1.300 ...

Page 10

ADM690–ADM695 +APPLICATION INFORMATION Increasing the Drive Current If the continuous output current requirements at V 100 lower V –V voltage differential is desired, CC OUT an external PNP pass transistor may be connected in parallel with ...

Page 11

INPUT POWER BATT 10M BATTERY ADM69x PFI 10M 20k OPTIONAL CE OUT TEST LOAD Figure 20. Monitoring the Battery Status Alternate Watchdog Input Drive Circuits The watchdog feature can be enabled and disabled under pro- gram ...

Page 12

ADM690–ADM695 R =(V – 50 mV)/ Note that the resistor will discharge the battery slightly. With a V supply of 4 suitable resistor is 4 With battery this will draw ...

Page 13

INPUT POWER +5V 0 BATT V OUT BATT OUT BATTERY R ADM691 ADM693 ADM695 PFI GND WDI OSC IN PFO OSC SEL RESET LOW LINE WDO SYSTEM ...

Page 14

ADM690–ADM695 0.210 (5.33) 0.200 (5.05) 0.125 (3.18) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Pin Plastic DIP (N- 0.280 (7.11) PIN 1 0.240 (6.10 0.325 (8.25) 0.430 (10.92) 0.300 (7.62) 0.348 (8.84) 0.060 (1.52) 0.210 ...

Page 15

SEATING 0.299 (7.60) REV. A 16-Lead Cerdip (Q-16 0.310 (7.87) PIN 1 0.220 (5.59 0.840 (21.34) MAX 0.060 (1.52) 0.015 (0.38) 0.200 (5.08) MAX 0.150 (3.81) MIN PLANE 0.022 (0.558) 0.100 (2.54) 0.070 (1.78) BSC 0.014 ...

Page 16

–16– ...

Related keywords