CAT1163 Catalyst Semiconductor, CAT1163 Datasheet

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CAT1163

Manufacturer Part Number
CAT1163
Description
Supervisory Circuit with I2C Serial CMOS EEPROM/ Precision Reset Controller and Watchdog Timer
Manufacturer
Catalyst Semiconductor
Datasheet

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DESCRIPTION
The CAT1163 is a complete memory and supervisory
solution for microcontroller-based systems. A serial
EEPROM memory (16K) with hardware memory write
protection, a system power supervisor with 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 CAT1163 watchdog monitors
the WDI input pin.
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
PIN CONFIGURATION
CAT1163 (16K)
Supervisory Circuit with I
FEATURES
© 2002 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Reset Threshold Voltage Options
RESET
Part Dash
Number
400kHz I
2.7V to 6.0V operation
Low power CMOS technology
16-Byte page write buffer
Built-in inadvertent write protection
— V
— Write protect pin, WP
Watchdog timer input (WDI)
GND
WDI
2
WP
C bus.
-45
-42
-30
-28
-25
CC
lock out
CAT1163
2
C bus compatible
Threshold
Minimum
4.50
4.25
3.00
2.85
2.55
V CC
RESET
SCL
SDA
Threshold
Maximum
2
C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer
4.75
4.50
3.15
3.00
2.70
supply voltages are out of tolerance reset signals become
active, preventing the system microcontroller, ASIC or
peripherals from operating. Reset signals become inactive
typically 200 ms 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 debounced input for
push-button manual reset capability.
The CAT1163 memory features a 16-byte page. In addition,
hardware data protection is provided by a write protect pin
WP and by a V
memory whenever V
until V
Available packages include an 8-pin DIP and a surface
mount, 8-pin SO package.
BLOCK DIAGRAM
CC
Active high or low reset
— Precision power supply voltage monitor
— 5V, 3.3V and 3V systems
— Five threshold voltage options
1,000,000 Program/Erase cycles
Manual reset
100 Year data retention
8-pin DIP or 8-pin SOIC
Commercial and industrial temperature ranges
EXTERNAL LOAD
V CC
GND
SDA
WP
reaches the reset threshold during power up.
START/STOP
CC
WATCHDOG
LOGIC
CONTROL
WORD ADDRESS
LOGIC
RESET Controller
WDI
BUFFERS
sense circuit that prevents writes to
D OUT
ACK
CC
RESET RESET
Vcc Monitor
Precision
falls below the reset threshold or
XDEC
SHIFT REGISTERS
DATA IN STORAGE
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
TIMING CONTROL
HIGH VOLTAGE/
SENSE AMPS
DECODERS
COLUMN
EEPROM
Doc No. 3003, Rev. C
SCL

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CAT1163 Summary of contents

Page 1

... 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 debounced input for push-button manual reset capability. The CAT1163 memory features a 16-byte page. In addition, hardware data protection is provided by a write protect pin WP and sense circuit that prevents writes to ...

Page 2

... CAT1163 ABSOLUTE MAXIMUM RATINGS Temperature Under Bias ................. – +125 C Storage Temperature ....................... – +150 C Voltage on any Pin with (1) Respect to Ground ............ –2. with Respect to Ground ............... –2.0V to +7.0V CC Package Power Dissipation Capability ( ................................... 1.0W A Lead Soldering Temperature (10 secs) ............ 300 C (2) Output Short Circuit Current ........................ 100 mA Stresses above those listed under “ ...

Page 3

... Min Max 100 200 3.5 4.7 4 4 300 4 100 Max Units Min Typ is stable until the specific operation can be initiated CAT1163 Conditions I 4.5V - 5.5V CC Min Max Units 400 kHz 200 1.2 s 0.6 s 1.2 s 0 ...

Page 4

... Reset Output Low Voltage (I OLRS V Reset Output High Voltage OHRS Reset Threshold (VCC=5V) (CAT1163-45) Reset Threshold (VCC=5V) (CAT1163-42) Reset Threshold (VCC=3.3V (CAT1163-30) Reset Threshold (VCC=3.3V) (CAT1163-28) Reset Threshold (VCC=3V) (CAT1163-25) t Power-Up Reset Timeout PURST t Watchdog Period RESET Output Delay RPD TH ...

Page 5

... The inputs are edge triggered; that is, the RESET input in the CAT1163 will initiate a reset timeout after detecting a low to high transition and the RESET input in the CAT1163 will initiate a reset timeout after detecting a high to low transition. ...

Page 6

... Hardware Data Protection The CAT1163 is designed with the following hardware data protection features to provide a high degree of data integrity. (1) The CAT1163 features a WP pin. When the WP pin is tied high the entire memory array becomes write protected (read only). (2) The V sense provides write protection when V CC falls below the reset threshold value (VTH) ...

Page 7

... The next three bits (Figure 6) define memory addressing. For the CAT1163 the three bits define higher order bits. The last bit of the slave address specifies whether a Read or Write operation performed. When this bit is set Read operation is selected, and when set Write operation is selected ...

Page 8

... While the cycle is in progress, the device will not respond to any request from the Master device. Page Write The CAT1163 writes bytes of data in a single write cycle, using the Page Write operation. The page write operation is initiated in the same manner as the byte ...

Page 9

... CAT1163 initiates the internal write cycle. ACK polling can be initiated immediately. This involves issuing the start condition followed by the slave address for a write operation. If the CAT1163 is still busy with the write operation, no ACK will be returned write operation has completed, an ACK will be returned and the host can then proceed with the next read or write operation ...

Page 10

... The data being transmitted from CAT1163 is outputted sequentially with data from address N followed by data from address N+1. The READ operation address counter increments all of the CAT1163 address bits so that the entire memory array can be read during one operation. If more than E (where E=2047 for the CAT1163) bytes are read out, the counter will ‘ ...

Page 11

... SDA LINE Ordering Information Prefix Device # CAT Optional Product Company ID Number 1163: 16K Note: (1) The device used in the above example is a CAT1163JI-30TE13 (16K I Threshold Voltage, Tape and Reel) DATA n DATA n+1 DATA n Suffix J I Temperature Range Blank = Commercial (0˚ ...

Page 12

... Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. ...

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