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CAT1161, CAT1162 & CAT1163
Supervisory Circuits with I2C Serial EEPROM Memory and Watchdog Protection
BENEFITS
* Single chip solution - Supervisor - Serial 16Kbit EEPROM memory with write protection - Watchdog * Data Integrity - Hardware write protection pin, WP - Low VCC write lockout protection * System recovery from power brownouts * Recover from "stuck" systems * Controlled power up and power down of microcontrollers * High density: 16Kbits * 1 million write cycles * Low standby power : 40 A @ 3.3V
CAT1163 with Independent Watchdog Input
EXTERNAL LOAD DOUT ACK VCC GND WORD ADDRESS BUFFERS COLUMN DECODERS SENSE AMPS SHIFT REGISTERS
FEATURE S H E E T
FL AS H * Serial E E PR O M * Parallel E E PR O M * N VRA M * Digitally Programmable Potentiometers * Microprocessor Supervisors
SDA
START/STOP LOGIC
XDEC WP CONTROL LOGIC
EEPROM (2/4/8/16K)
DATA IN STORAGE
HIGH VOLTAGE/ TIMING CONTROL RESET Controller
WATCHDOG
STATE COUNTERS SLAVE ADDRESS COMPARATORS
SCL
Precision
Vcc Monitor
FEATURES
* 16Kbit EEPROM Memory - Hardware write protect (WP) - I2C interface - Built-in inadvertent write protection, VCC lockout - 16-byte page write buffer - 2.7V to 6V operation * Five Reset Threshold Options for 5V, 3.3V and 3V systems * Dual active low and active high reset outputs * 200ms reset period * Watchdog timer - 1.6 second period - Monitors SDA line (CAT1161) - Independent watchdog input (CAT1163) - Low cost CAT1162 without watchdog
24C1601 BLOCK
WDI RESET RESET
DESCRIPTION
The CAT116x Supervisory Circuits with Serial EEPROM memory are part of Catalyst Semiconductor's advanced AE2 TM (Analog EEPROM) product offering. The three-member family features versions with dual polarity reset outputs, watchdog capability, and I2C interfaced 16Kbit serial EEPROM memory with hardware write protection. Five reset threshold voltage options support 5-volt, 3.3-volt and 3-volt powered systems. Reset threshold voltage options are 5 percent and 10 percent for 5-volt and 3.3-volt systems, and 10 percent for 3-volt systems. CAT116x devices have two memory protection features. A hardware write protection signal on the WP pin sets the entire array into a READ only mode. In addition, a low voltage supply lockout circuit inhibits writes to the serial EEPROM. All CAT116x devices detect power-up, power-down and brownout power states. Whenever the supply voltage is below the reset threshold, reset signals become active. Reset signals are valid for power supply voltages down to 1 volt. During power-up or after a brownout condition, the reset signals remain active for a minimum of 130 milliseconds and a maximum of 270 milliseconds. Unlike simple supervisory circuits, each Catalyst device has both an active high and an active low reset pin. In addition, a reset pin can serve as an input pin. For example, a mechanical switch can be connected to a reset pin as a manual reset. The CAT116x will debounce the signal.
www.c at alyst-semiconductor.com
Customer Service & Technical Support Hotline 800-258-5991
Catalyst Semiconductor, Inc. * 125 0 Borregas Avenue * Sunnyvale, CA 940 8 9 * TEL [408] 542-1000 * FAX [408] 542-1200
The Catalyst CAT1161 and CAT1163 have increased system-monitoring capability. Even with the correct power supply voltage, a system can become locked in an unwanted state. A system can become frozen or "stuck" in a non-operating state when hardware fails or software bugs occur. For such cases, the watchdog circuit on the CAT1161 and CAT1163 will detect when a system has failed and issue a system-reset signal. The CAT1161 and CAT1163 devices integrate a 1.6-second watchdog timer on-chip. The watchdog timer monitors a signal for activity. Any activity on the monitored pin will cause the timer to restart its 1.6-second count. If no activity is detected on a monitored signal during the watchdog period, the watchdog timer "times-out" and the reset signals become active. The CAT1161 watchdog timer monitors the Serial/Data Address (SDA) line internally, thus eliminating an external PC board trace. The CAT1163 watchdog input (WDI) pin can monitor any external signal. The low-cost CAT1162 does not have watchdog capability.
CAT1161/1162/1163
APPLICATIONS
* Industrial control * Power meters * ATE
* Smart instruments
* Medical equipment
* Embedded control systems * Office equipment
FEATURE S H E E T
FLA S H * Serial E E P RO M * Parallel E E PR O M * N VRAM * Digitally Programmable Potentiometers * Microprocessor Supervisors
SELECTION GUIDE
CATALYST DEVICE CAT1161 CAT1162 CAT1163 EE MEMORY 16Kbits 16Kbits 16Kbits WATCHDOG TIMER Yes No Yes WATCHDOG INPUT SDA No Watchdog Independent, WDI
* White goods * Automotive
* Wireless communications
PACKAGE OPTIONS
* 8-lead DIP and SOIC
FIVE RESET VOLTAGE OPTIONS
Part Dash Number -45 -42 -30 -28 -25 Minimum Threshold 4.50 4.25 3.00 2.85 2.55 Maximum Threshold 4.75 4.50 3.15 3.00 2.70
DC RESET WP GND
DC RESET WP GND
VCC RESET SCL SDA
CAT1161/1162
VCC RESET SCL SDA
CAT1163
www.catalyst-semiconductor.com
Document No. 7010, Rev. B, 10/22/02
CAT1161/1162/1163
REQUEST FORM
Samples & Literature
FLASH * Serial EEPROM * Parallel EEPROM * NVRAM * Digitally Programmable Potentiometers * Microprocessor Supervisors To obtain samples or data sheets, mail this form or fax to (408) 542-1200. Data sheets are available directly from our web site at www.catalyst-semiconductor.com. QUESTIONNAIRE WWW.CATALYST-SEMICONDUCTOR.COM
Please take a moment to answer the brief questions below. Questions marked with an asterisk (*) are required fields for processing your sample requests. Thank you for your support and for making Catalyst Semiconductor your choice for chip technology!
* 1) Will this information be used for a project that will be in production....
3) What is your role on this project? Designer
Now
Next 2 - 6 months Next 7 - 12 months
13 - 18 months
* 2) What is the name of your project?______________________________________________________________
Component Engineer Purchasing Project Manager 1k-10k Units Other Fewer than 1k Units Entertainment 4) What do you expect your annual usage to be? 100k-1 Million Units 10k-100k Units
* 5) What is the primary end-use of this product?
Motor control Computer systems & peripherals Medical Power
Data communications Test
Wireless communications Home appliances Industrial control Handheld instruments Other__________________ QUESTIONNAIRE PRODUCT NUMBER DESCRIPTION
Telecomm
PDAs
PACKAGE
8-lead DIP 8-lead SOIC
TEMPERATURE RANGE
Commercial Industrial Commercial Industrial Commercial Industrial 4.5V to 4.75V 4.25V to 4.5V 4.5V to 4.75V 4.25V to 4.5V 4.5V to 4.75V 4.25V to 4.5V
THRESHOLD VOLTAGE
3.0V to 3.15V 2.85V to 3.0V 3.0V to 3.15V 2.85V to 3.0V 3.0V to 3.15V 2.85V to 3.0V
WWW.CATSEMI.COM DATA SAMPLE SHEET QTY
2.55V to 2.7V
CAT1163 CAT1161 CAT1162
GEN FR ALO
16K, WDI Input 16K, SDA Watchdog Input 16K, No Watchdog
EE
_____ _____ _____
8-lead DIP
8-lead SOIC
2.55V to 2.7V
8-lead DIP
8-lead SOIC
2.55V to 2.7V
H
LE
A D F R E ETM
Please contact me about your "Green" package program.
COMPANY INFORMATION
first name company street address 1 street address 2 city
last name web site department
title email address telephone fax
state/province
zip/country
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Attn: Sample & Literature Fulfillment Catalyst Semiconductor, Inc. 1250 Borregas Avenue Sunnyvale, CA 94089-1309 USA
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