BR9010FV View Datasheet(PDF) - ROHM Semiconductor

Part Name

Description

Manufacturer

BR9010FV

1, 2, and 4k bit EEPROMs for direct connection to serial ports

ROHM Semiconductor 

Memory ICs

1, 2, and 4k bit EEPROMs for direct

connection to serial ports

BR9010 / BR9010F / BR9010FV / BR9020 /

BR9020F / BR9040 / BR9040F

•Features

•BR9010 / F / FV (1k bit): 64 words × 16 bits

BR9020 / F (2k bit): 128 words × 16 bits

BR9040 / F (4k bit): 256 words × 16 bits

•Single power supply operation

•Serial data input and output

•Automatic erase-before-write

•Low current consumption

–1.5mA (max.) active current: 3V

–2µA (max.) standby current: 3V

•Noise filter built into SK pin

•Compact DIP8, SOP8, SSOP-B8 packages (SSOP-

B8 is available only with BR9010).

•100,000 ERASE / WRITE cycles

•10 years Data Retention

•Easily connects to serial port

•Pin assignments

CS 1

8 VCC R / B∗ 1

8 WC

SK 2 BR9010 /

7

BR9020 / 9040

DI 3

6

R / B∗ VCC 2

WC CS 3

DO 4

5 GND SK 4

BR9010F / 7 GND

BR9010FV /

BR9020F / 6 DO

BR9040F

5 DI

∗ This pin is N.C. (non connection) on BR9010.

•Pin description

Pin

name

CS

SK

DI

DO

GND

WC

R /B

VCC

Function

Chip select input

Serial data clock input

Operating code, address, and serial data input

Serial data output

Reference voltage for all I / O, 0V

Write control input

READY, BUSY status signal output

Power supply connection

•Overview

The BR90 series are serial EEPROMs that can be connected directly to a serial port and can be erased and written

electrically. Writing and reading is performed in word units, using four types of operation commands. Communication

occurs through CS, SK, DI, and DO pins, WC pin control is used to initiate a write disabled state, enabling these

EEPROMs to be used as one-time ROMs. During writing, operation is checked via the internal status check.

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