24LCS61_62| Datasheet

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Obsolete Device

24LCS61/24LCS62
1K/2K Software Addressable I2CTM Serial EEPROM
Device Selection Table
Device 24LCS51 24LCS62 Array Size 1K bits 2K bits Voltage Range 2.5V-5.5V 2.5V-5.5V Software Write Protection Entire Array Lower Half
EDS Vss 3 4

Package Types
PDIP NC NC 1 24LCS61/62 2 8 7 6 5 8 7 6 5 8 7 6 5 Vcc NC SCL SDA

Features
Low-power CMOS technology - 1 mA active current typical - 10 uA standby current typical at 5.5V Software addressability allows up to 255 devices on the same bus 2-wire serial interface bus, I2C compatible Automatic bus arbitration Wakes up to control code 0110 General purpose output pin can be used to enable other circuitry 100 kHz and 400 kHz compatibility Page write buffer for up to 16 bytes 10 ms max write cycle time for byte or page write 1,000,000 erase/write cycles 8-pin PDIP, SOIC or TSSOP packages Temperature ranges supported: - Industrial (I): -40 C to +85 C

SOIC NC NC EDS Vss TSSOP NC NC EDS VSS 1 2 3 4

1 2 3 4

VCC NC SCL SDA

24LCS61/62 24LCS61/62

Vcc NC SCL SDA

Block Diagram
EDS HV Generator Memory Control Logic

I/O Control Logic

XDEC

EEPROM Array ID Register Serial Number

Description
The Microchip Technology Inc. 24LCS61/62 is a 1K/2K bit Serial EEPROM developed for applications that require many devices on the same bus but do not have the I/O pins required to address each one individually. These devices contain an 8 bit address register that is set upon power-up and allows the connection of up to 255 devices on the same bus. When the process of assigning ID values to each device is in progress, the device will automatically handle bus arbitration if more than one device is operating on the bus. In addition, an external open drain output pin is available that can be used to enable other circuitry associated with each individual system. Low current design permits operation with typical standby and active currents of only 10 uA and 1 mA respectively. The device has a page write capability for up to 16 bytes of data. The device is available in the standard 8-pin PDIP, SOIC (150 mil), and TSSOP packages.
I2C is a trademark of Philips Corporation. SDA SCL VCC VSS

YDEC Sense Amp. R/W Control

Pin Function Table
Name VSS SDA SCL VCC NC EDS Ground Serial Data Serial Clock +2.5V to 5.5V Power Supply No Internal Connection External Device Select Output Function

2004 Microchip Technology Inc.

DS21226E-page 1