25LC640-I/SN Microchip Technology Inc., 25LC640-I/SN Datasheet

25LC640-I/SN

Manufacturer Part Number

25LC640-I/SN

Description

64K, 8K X 8 , 2.5V SER EE IND

Manufacturer

Microchip Technology Inc.

Datasheet

1.25LC640-ISN.pdf (6 pages)

Specifications of 25LC640-I/SN

Capacitance, Input

7 pF

Capacitance, Output

7 pF

Current, Input, Leakage

±1 μA

Current, Operating

1 mA (Read), 5 mA (Write)

Current, Output, Leakage

±1

Data Retention

>200 yrs.

Density

64K

Interface

SPI Bus

Memory Type

Serial EEPROM

Organization

8192×8

Package Type

SOIC

Temperature, Operating

-40 to +85 °C

Time, Access

230 ns

Time, Address Hold

250

Time, Address Setup

250

Time, Fall

2 μs

Time, Rise

2 μs

Voltage, Esd

>4 kV

Voltage, Input, High

3.5 V

Voltage, Input, Low

0.5 V

Voltage, Output, High

2 V

Voltage, Output, Low

0.4 V

Voltage, Supply

2.5 to 5.5 V

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

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Device Selection Table

Features:

• Low-Power CMOS Technology

• 8192 x 8 Bit Organization

• 32 Byte Page

• Write Cycle Time: 5 ms max.

• Self-Timed Erase and Write Cycles

• Block Write Protection

• Built-in Write Protection

• Sequential Read

• High Reliability

• 8-pin PDIP, SOIC and TSSOP Packages

• Temperature Ranges Supported:

Package Types

*25XX640 is used in this document as a generic part number for the 25AA640/25LC640 devices.

25AA640

25LC640

- Write current: 3 mA, typical

- Read current: 500

- Standby current: 500 nA, typical

- Protect none, 1/4, 1/2 or all of array

- Power on/off data protection circuitry

- Write enable latch

- Write-protect pin

- Data retention: > 200 years

- ESD protection: > 4000V

- Industrial (I): -40°C to +85°C

- Automotive (E): -40°C to +125°C

Number

Part

1.8-5.5V

2.5-5.5V

4.5-5.5V

Range

A, typical

Frequency

PDIP/SOIC

Max Clock

64K SPI Bus Serial EEPROM

3/2.5 MHz

1 MHz

2 MHz

25AA640/25LC640

HOLD

SCK

Ranges

Temp

I, E

HOLD

Description:

The Microchip Technology Inc. 25AA640/25LC640

(25XX640

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.

Block Diagram

HOLD

SCK

I/O Control

STATUS

Not recommended for new designs –

Please use 25AA640A or 25LC640A.

) is a 64 Kbit Serial Electrically Erasable

Logic

TSSOP

Memory

Control

Logic

SCK

XDEC

DS21223H-page 1

Sense Amp.

R/W Control

Y Decoder

HV Generator

EEPROM

Latches

Array

Page

Related parts for 25LC640-I/SN

25LC640-I/SN Summary of contents

Page 1

... Package Types PDIP/SOIC *25XX640 is used in this document as a generic part number for the 25AA640/25LC640 devices. © 2008 Microchip Technology Inc. Not recommended for new designs – Please use 25AA640A or 25LC640A. 25AA640/25LC640 Description: Temp The Microchip Technology Inc. 25AA640/25LC640 Ranges * (25XX640 ) Kbit Serial Electrically Erasable PROM [EEPROM] ...

Page 2

... ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................7.0V CC All inputs and outputs w.r.t. V ........................................................................................................ -0. Storage temperature .................................................................................................................................-65°C to 150°C Ambient temperature under bias ...............................................................................................................-65°C to 125°C ESD protection on all pins ..........................................................................................................................................4 kV † NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...

Page 3

... CLK A 3: This parameter is not tested but established by characterization. For endurance estimates in a specific application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site © 2008 Microchip Technology Inc. 25AA640/25LC640 Industrial (I -40°C to +85°C A Automotive (E -40° ...

Page 4

... Microchip Technology Inc. 25AA640/25LC640 PP %RG\ >62,&@ α φ β DS21223H-page 15 ...

Page 5

Page 6

... Industrial Temp., SOIC package b) 25AA640T-I/SN: Tape and Reel, Industrial Temp., SOIC package c) 25AA640X-I/ST: Alternate Pinout Industrial Temp., TSSOP package d) 25LC640-I/SN: Industrial Temp., SOIC package e) 25LC640T-I/SN: Tape and Reel, Industrial Temp., SOIC package f) 25LC640X-I/ST: Alternate Pinout, Industrial Temp., TSSOP package . DS21223H-page 21 ...

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