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BR9020F Datasheet(PDF) 1 Page - Rohm

Part # BR9020F
Description  1, 2, and 4k bit EEPROMs for direct connection to serial ports
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BR9020F Datasheet(HTML) 1 Page - Rohm

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1
Memory ICs
1, 2, and 4k bit EEPROMs for direct
connection to serial ports
BR9010 / BR9010F / BR9010FV / BR9020 /
BR9020F / BR9040 / BR9040F
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.
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
–2
µA (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
1
2
3
4
8
7
6
5
CS
SK
DI
DO
VCC
R / B
WC
GND
BR9010 /
BR9020 / 9040
1
2
3
4
8
7
6
5
R / B
VCC
CS
SK
WC
GND
DO
DI
BR9010F /
BR9010FV /
BR9020F /
BR9040F
Pin description
CS
SK
DI
DO
GND
WC
VCC
R / B
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
Pin
name
∗ This pin is N.C. (non connection) on BR9010.


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