Homedatasheet25C640X-/ST

25C640X-/ST Datasheet

SPI->4K to 64K
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Description

Features, Applications

Description

Temp Ranges I, E The Microchip Technology Inc. a 64K bit Serial Electrically Erasable PROM [EEPROM]. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input. Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception of chip select, allowing the host to service higher priority interrupts.

Features

Low power CMOS technology - Write current: 3 mA typical - Read current: 500 �A typical - Standby current: 500 nA typical x 8 bit organization 32 byte page Write cycle time: 5 ms max. Self-timed ERASE and WRITE cycles Block write protection - Protect none, 1/2 or all of array Built-in write protection - Power on/off data protection circuitry - Write enable latch - Write protect pin Sequential read High reliability - Data retention: > 200 years - ESD protection: 4000V 8-pin PDIP, SOIC and TSSOP packages Temperature ranges supported: - Industrial (I): +85�C - Automotive (E): to +125�C

EEPROM I/O Control Logic Memory Control Logic X Array Dec Page Latches
*25XX640 is used in this document as a generic part number for the 25AA640/25LC640 devices.

VCC.............................................................................................................................................................................7.0V All inputs and outputs w.r.t. VSS.......................................................................................................... to VCC+1.0V Storage temperature................................................................................................................................. to 150�C Ambient temperature under to 125�C Soldering temperature of leads (10 seconds).......................................................................................................+300�C ESD protection on all pins..........................................................................................................................................4 kV NOTICE: Stresses above those listed under `Maximum ratings' may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an extended period of time may affect device reliability.

Industrial (I): Automotive (E): Characteristics High level input voltage Low level input voltage Low level output voltage High level output voltage Input leakage current Output leakage current Internal Capacitance (all inputs and outputs) Operating Current Min 2.0 0.7 VCC D11 D12 Note: VOH ILI ILO CINT ICC Read ICC Write ICCS Standby Current VCC -0.5 -10 TAMB to +85�C VCC to 5.5V TAMB to +125�C VCC to 5.5V Max 0.8 0.2 VCC Units

Conditions VCC 2.7V (Note) VCC< 2.7V (Note) VCC 2.7V (Note) VCC < 2.7V (Note) IOL 2.1 mA IOL = 1.0 mA, VCC < 2.5V IOH CS = VCC, VIN = VSS TO VCC CS = VCC, VOUT = VSS TO VCC TAMB = 25�C, CLK = 1.0 MHz, VCC = 5.0V (Note) VCC = 5.5V; FCLK = 3.0 MHz; SO = Open VCC = 2.5V; FCLK = 2.0 MHz; SO = Open VCC = 5.5V VCC CS = VCC = 5.5V, Inputs tied to VCC or VSS CS = VCC = 2.5V, Inputs tied to VCC or VSS


Features

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