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CAT24C163(16K), CAT24C083(8K) CAT24C043(4K), CAT24C023(2K)
Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog Timer Input (WDI) s Programmable Reset Threshold s s s s s s Active High or Low Reset Outputs
400 KHz I2C Bus Compatible 2.7 to 6 Volt Operation Low Power CMOS Technology 16 - Byte Page Write Buffer Built-in inadvertent write protection — VCC Lock Out
s s s s
— Precision Power Supply Voltage Monitoring — 5V, 3.3V and 3V options 1,000,000 Program/Erase Cycles 100 Year Data Retention 8-Pin DIP or 8-Pin SOIC Commercial, Industrial and Automotive Temperature Ranges
DESCRIPTION
The CAT24CXX3 is a single chip solution to three popular functions of EEPROM memory, precision reset controller and watchdog timer. The 24C163(16K), 24C083(8K), 24C043(4K) and 24C023(2K) feature a I2C Serial CMOS EEPROM Catalyst advanced CMOS technology substantially reduces device power requirements. The 24CXX3 features a 16-byte page and is available in 8-pin DIP or 8-pin SOIC packages. The reset function of the 24CXX3 protects the system during brown out and power up/down conditions. During system failure the watchdog timer feature protects the microcontroller with a reset signal. 24CXX3 features active low reset on pin 2 and active high reset on pin 7. 24CXX3 features watchdog timer on the WDI input pin (pin 1).
PIN CONFIGURATION
24CXX3
WDI RESET WP VSS VCC RESET SCL SDA
BLOCK DIAGRAM
EXTERNAL LOAD DOUT ACK VCC VSS WORD ADDRESS BUFFERS COLUMN DECODERS SENSE AMPS SHIFT REGISTERS
*All products offered in P and J packages
SDA
START/STOP LOGIC
PIN FUNCTIONS
Pin Name SDA RESET/RESET SCL Vcc VSS WDI WP Function
WP
XDEC CONTROL LOGIC
E2PROM
Serial Data/Address Reset I/O Clock Input Power Supply Ground Watchdog Timer Input Write Protect
DATA IN STORAGE
HIGH VOLTAGE/ TIMING CONTROL RESET Controller
WATCHDOG
STATE COUNTERS SLAVE ADDRESS COMPARATORS
SCL
High Precision
Vcc Monitor
24C1601 BLOCK
WDI RESET/RESET
© 1998 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. 25080-00 3/98 M-1
CAT24C163/083/043/023
Advanced
ABSOLUTE MAXIMUM RATINGS*
Temperature Under Bias....................–55°C to +125°C Storage Temperature........................ –65°C to +150°C Voltage on Any Pin with Respect to Ground(1) ..............–2.0V to +VCC + 2.0V
COMMENT
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
VCC with Respect to Ground..................–2.0V to +7.0V Package Power Dissipation Capability (Ta = 25°C)1.0W.................................1.0W Lead Soldering Temperature (10 secs)...............300°C Output Short Circuit Current(2) ..........................100mA
RELIABILITY CHARACTERISTICS
Symbol NEND(3) TDR
(3) (3)
Parameter Endurance Data Retention ESD Susceptibility Latch-up
Min. 1,000,000 100 2000 100
Max.
Units Cycles/Byte Years Volts mA
Reference Test Method MIL-STD-883, Test Method 1033 MIL-STD-883, Test Method 1008 MIL-STD-883, Test Method 3015 JEDEC Standard 17
VZAP
ILTH(3)(4)
D.C. OPERATING CHARACTERISTICS
VCC = +2.7V to +6.0V, unless otherwise specified.
Symbol ICC Isb
Parameter Power Supply Current Standby Current
Min.
Limits Typ. Max. 3 40 50
Units mA µA µA µA µA V V V
Test Conditions f SCL = 100 KHz Vcc=3.3V Vcc=5 VIN=GND or VCC VIN=GND or VCC
ILI ILO VIL VIH VOL
Input Leakage Current Output Leakage Current Input Low Voltage Input High Voltage Output Low Voltage (SDA) –1 VCC x 0.7
2 10 VCC x 0.3 VCC + 0.5 0.4
IOL = 3 mA, VCC = 3.0V
CAPACITANCE TA = 25°C, f = 1.0 MHz, VCC = 5V Symbol CI/O(3) CIN
(3)
Test Input/Output Capacitance (SDA) Input Capacitance (SCL)
Max. 8 6
Units pF pF
Conditions VI/O = 0V VIN = 0V
Note: (1) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns. Maximum DC voltage on output pins is VCC +0.5V, which may overshoot to VCC + 2.0V for periods of less than 20ns. (2) Output shorted for no more than one second. No more than one output shorted at a time. (3) This parameter is tested initially and after a design or process change that affects the parameter. (4) Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1V to VCC +1V.
Doc. No. 25080-00 3/98 M-1
2
Advanced
A.C. CHARACTERISTICS
VCC=2.7V to 6.0V unless otherwise specified. Output Load is 1 TTL Gate and 100pF
CAT24C163/083/043/023
Read & Write Cycle Limits Symbol Parameter VCC=2.7V - 6V Min. FSCL TI(1) tAA tBUF(1) tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR(1) tF(1) tSU:STO tDH Clock Frequency Noise Suppression Time Constant at SCL, SDA .