CAT1161PI-42 Catalyst / ON Semiconductor, CAT1161PI-42 Datasheet

Supervisory Circuits 16K I2C Memory w/WDT

CAT1161PI-42

Manufacturer Part Number
CAT1161PI-42
Description
Supervisory Circuits 16K I2C Memory w/WDT
Manufacturer
Catalyst / ON Semiconductor
Datasheet

Specifications of CAT1161PI-42

Number Of Voltages Monitored
1
Monitored Voltage
3 V, 3.3 V, 5 V
Output Type
Active High, Active Low, Open Drain
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Supply Voltage (max)
6 V
Supply Voltage (min)
2.7 V
Supply Current (typ)
3000 uA
Maximum Power Dissipation
1000 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Package / Case
PDIP-8
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Undervoltage Threshold
4.25 V
Overvoltage Threshold
4.5 V
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Supervisory Circuits with I
Precision Reset Controller and Watchdog Timer (16K)
FEATURES
DESCRIPTION
The CAT1161/2 is a complete memory and supervi-
sory solution for microcontroller-based systems. A se-
rial EEPROM memory (16K) with hardware memory
write protection, a system power supervisor with
PIN CONFIGURATION
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
For Ordering Information details, see page 13.
Watchdog monitors SDA signal (CAT1161)
400kHz I
2.7V to 6.0V operation
Low power CMOS technology
16-Byte page write buffer
Built-in inadvertent write protection
Active high or low reset
1,000,000 Program/Erase cycles
Manual Reset
100 Year data retention
8-pin DIP or 8-pin SOIC
Commercial and industrial temperature ranges
V
Write protect pin, WP
Precision power supply voltage monitor
5V, 3.3V and 3V systems
Five threshold voltage options
CC
¯¯¯¯¯¯
RESET
2
lock out
C bus compatible
GND 4
WP 3
DC 1
2
SOIC 8 Lead
PDIP 8 Lead
CAT1161
CAT1162
8 V
7 RESET
6 SCL
5 SDA
CC
2
C Serial CMOS EEPROM,
1
brown out protection and a watchdog timer are
integrated together in low power CMOS technology.
Memory interface is via an I
The 1.6-second watchdog circuit returns a system to a
known good state if a software or hardware glitch
halts or “hangs” the system. The CAT1161 watchdog
monitors the SDA line, making an additional PC board
trace unnecessary. The lower cost CAT1162 does not
have a watchdog timer.
The power supply monitor and reset circuit protects
memory and system controllers during power up/down
and against brownout conditions. Five reset threshold
voltages support 5V, 3.3V and 3V systems. If power
supply voltages are out of tolerance reset signals
become active, preventing the system microcontroller,
ASIC or peripherals from operating. Reset signals
become inactive typically 200ms after the supply
voltage exceeds the reset threshold level. With both
active high and low reset signals, interface to
microcontrollers and other ICs is simple. In addition, a
reset pin can be used as a debounced input for push-
button manual reset capability.
The CAT1161/2 memory features a 16-byte page. In
addition, hardware data protection is provided by a
write protect pin WP and by a V
prevents writes to memory whenever V
the reset threshold or until V
threshold during power up.
Available packages include an 8-pin DIP and a
surface mount, 8-pin SO package.
PIN FUNCTIONS
Pin Name
¯¯¯¯¯¯
RESET
RESET
GND
SDA
SCL
WP
V
DC
CC
Function
Do not Connect
Active Low Reset I/O
Write Protect
Ground
Serial Data/Address
Clock Input
Active High Reset I/O
Power Supply
CAT1161, CAT1162
2
C bus.
CC
CC
reaches the reset
sense circuit that
Doc. No. MD-3002 Rev. I
CC
falls below

Related parts for CAT1161PI-42

CAT1161PI-42 Summary of contents

Page 1

... Supervisory Circuits with I Precision Reset Controller and Watchdog Timer (16K) FEATURES Watchdog monitors SDA signal (CAT1161) 2 400kHz I C bus compatible 2.7V to 6.0V operation Low power CMOS technology 16-Byte page write buffer Built-in inadvertent write protection — V lock out CC — Write protect pin, WP Active high or low reset — ...

Page 2

CAT1161, CAT1162 BLOCK DIAGRAM EXTERNA L LOAD D OUT ACK V CC WORDADDRESS GND BUFFERS START/STOP SDA LOGIC XDEC CONTR OL WP LOGIC RESET Controller Precision WATCHDOG Only for Vcc Monitor CAT1161 RESET RESET ABSOLUTE MAXIMUM RATINGS Parameters Temperature Under ...

Page 3

D.C. OPERATING CHARACTERISTICS V = 2.7V to 6V, unless otherwise specified. CC Symbol Parameter I Power Supply Current CC I Standby Current SB I Input Leakage Current LI I Output Leakage Current LO V Input Low Voltage IL V Input ...

Page 4

CAT1161, CAT1162 WRITE CYCLE LIMITS Symbol Parameter t Write Cycle Time WR The write cycle time is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the write cycle, ...

Page 5

PIN DESCRIPTION WP: WRITE PROTECT If the pin is tied to V the entire memory array CC becomes Write Protected (READ only). When the pin is tied to GND or left floating normal read/write operations are allowed to the device. ...

Page 6

CAT1161, CAT1162 Hardware Data Protection The CAT1161/2 is designed with the following hardware data protection features to provide a high degree of data integrity. (1) The CAT1161/2 features a WP pin. When the WP pin is tied high the entire ...

Page 7

FUNCTIONAL DESCRIPTION 2 The CAT1161/2 supports the I C Bus data transmis– sion protocol. This Inter-Integrated Circuit Bus proto– col defines any device that sends data to the bus transmitter and any device receiving data to be ...

Page 8

CAT1161, CAT1162 Acknowledge After a successful data transfer, each receiving device is required to generate an acknowledge. The acknowledging device pulls down the SDA line during the ninth clock cycle, signaling that it received the 8 bits of data. The ...

Page 9

Acknowledge Polling Disabling of the inputs can be used to take advantage of the typical write cycle time. Once the stop condition is issued to indicate the end of the host’s write opration, the CAT1161/2 initiates the internal write cycle. ...

Page 10

CAT1161, CAT1162 Selective/Random Read Selective/Random READ operations allow the Master device to select at random any memory location for a READ operation. The Master device first performs a ‘dummy’ write operation by sending the START condition, slave address and byte ...

Page 11

PACKAGE OUTLINE DRAWINGS (1)(2) PDIP 8-Lead 300mils (L) PIN # 1 IDENTIFICATION D TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC MS-001. © 2009 SCILLC. All rights reserved. Characteristics subject ...

Page 12

CAT1161, CAT1162 (1)(2) SOIC 8-Lead 150mils (W) PIN # 1 IDENTIFICATION TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. Doc. No. MD-3002 Rev. I SYMBOL A ...

Page 13

EXAMPLE OF ORDERING INFORMATION Prefix Device # Suffix CAT 1162 W Optional Company ID Product Package L: Number 1161: 16K W: SOIC 1162: 16K ORDERING INFORMATION Orderable Part Number Reset Threshold Voltage CAT1161LI-25-G CAT1161LI-28-G CAT1161LI-30-G CAT1161LI-42-G CAT1161LI-45-G CAT1161WI-25-GT3 CAT1161WI-28-GT3 CAT1161WI-30-GT3 ...

Page 14

CAT1161, CAT1162 REVISION HISTORY Date Rev. Description Add Green Logo 17-Feb-05 E Add Package Outline Update Ordering Information Update Package Outline 2-Feb-07 F Update Example of Ordering Information Update Package Outline Drawings 28-Nov07 G Update Example of Ordering Information Add ...

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