CAT24WC33/65 Datasheet

32 Kb


Features, Applications

s 400 KHz I2C Bus Compatible* to 6 Volt Read and Write Operation s Cascadable for up to Eight Devices s 32-Byte Page Write Buffer s Self-Timed Write Cycle with Auto-Clear s 8-Pin DIP or 8-Pin SOIC s Schmitt Trigger Inputs for Noise Protection s Zero Standby Current s Commercial, Industrial and Automotive Tem-


The a 32K/64K-bit Serial CMOS E2PROM internally organized as 4096/8192 words of 8 bits each. Catalyst's advanced CMOS technology substantially reduces device power requirements. The CAT24WC33/65 features a 32-byte page write buffer. The device operates via the I2C bus serial interface and is available in 8-pin DIP or 8-pin SOIC packages.


Pin Name A1, A2 SDA SCL WP VCC VSS Function Device Address Inputs Serial Data/Address Serial Clock Write Protect to +6V Power Supply Ground

* Catalyst Semiconductor is licensed by Philips Corporation to carry the I2C Bus Protocol.
1998 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice

Temperature Under Bias................. to +125�C Storage Temperature....................... to +150�C Voltage on Any Pin with Respect �2.0V to +VCC + 2.0V VCC with Respect to Ground............... to +7.0V Package Power Dissipation Capability (Ta 25�C)................................... 1.0W Lead Soldering Temperature (10 secs)............ 300�C Output Short Circuit Current(2)........................ 100mA RELIABILITY CHARACTERISTICS Symbol NEND TDR

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.

Parameter Endurance Data Retention ESD Susceptibility Latch-up

Reference Test Method MIL-STD-883, Test Method 1033 MIL-STD-883, Test Method 1008 MIL-STD-883, Test Method 3015 JEDEC Standard 17

D.C. OPERATING CHARACTERISTICS VCC to +6.0V, unless otherwise specified. Limits Symbol ICC ISB(5) ILI ILO VIL VIH VOL1 VOL2 Parameter Power Supply Current Standby Current (VCC = 5V) Input Leakage Current Output Leakage Current Input Low Voltage Input High Voltage Output Low Voltage (VCC = +3.0V) Output Low Voltage (VCC +1.8V) �1 VCC x 0.7 Min. Typ. Max. VCC x 0.3 VCC Units mA �A IOL 3.0 mA IOL 1.5 mA Test Conditions fSCL = 100 KHz VIN = GND or VCC VIN = GND to VCC VOUT = GND to VCC

Test Input/Output Capacitance (SDA) Input Capacitance A1, A2, SCL, WP)

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 mA on address and data pins from �1V to VCC +1V. (5) Standby current (ISB �A (<900 nA).

A.C. CHARACTERISTICS VCC to +6V, unless otherwise specified Output Load is 1 TTL Gate and 100pF Read & Write Cycle Limits Symbol Parameter 1.8V, 2.5V Min. FSCL TI(1) tAA tBUF(1) tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR(1) tF

Clock Frequency Noise Suppression Time Constant at SCL, SDA Inputs SCL Low to SDA Data Out and ACK Out Time the Bus Must be Free Before a New Transmission Can Start Condition Hold Time Clock Low Period Clock High Period Start Condition Setup Time (for a Repeated Start Condition) Data In Hold Time Data In Setup Time SDA and SCL Rise Time SDA and SCL Fall Time Stop Condition Setup Time Data Out Hold Time

Power-Up Timing (1)(2) Symbol tPUR tPUW Parameter Power-Up to Read Operation Power-Up to Write Operation Max. 1 Units ms

Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.

Write Cycle Limits Symbol tWR Parameter Write Cycle Time Min. Typ. Max 10 Units ms

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, the bus

interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave address.



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