Manual

BR24C21 / BR24C21F / BR24C21FJ / BR24C21FV
Memory ICs
!
!!
!Block diagram
1 N.C.
N.C. 2
N.C. 3
GND 4
VCC8
VCLK7
6 SCL
SDA5
1kbits EEPROM array
Control logic
High voltage generator Vcc level detecter
7bits
8bits
ACK
STOPSTART
Address
decoder
Slave word
address register
7bits
Data
register
!
!!
!Pin assignment
BR24C21
BR24C21F
BR24C21FJ
BR24C21FV
VCC
N.C.
VCLK
N.C.
SCL
N.C.
SDA
GND
1234
5678
!
!!
!Pin descriptions
5
6
Serial clock input for Bi-directional Mode
7
8
1
No connection
4
I / OPin No.
SCL
N.C.
GND
Pin name Function
−
2
No connection
N.C.
−
3
No connection
N.C.
−
Power supply
V
CC
−
−
I
Clock input (Transmit-Only Mode)
Write enable (Bi-directional Mode)
VCLK
I
Ground (0V)
SDA
I / O
Slave and word address,
serial data input, serial data output
∗ An open drain output requires a pull-up resistor.
∗