FEDR27T25603L-02-04
OKI Semiconductor
MR27T25603L / P2ROM
BLOCK DIAGRAM
A–1
× 8/× 16 Switch
CE#
CE
OE#
OE
BYTE#
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
Row Decoder
Memory Cell Matrix
16M × 16-Bit or 32M × 8-Bit
Address Buffer
Column Decoder
Multiplexer
Output Buffer
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D12
D14
D15
D11
D13
In 8-bit output mode, these pins
are placed in a high-Z state and
pin D15 functions as the A-1
address pin.
PIN DESCRIPTIONS
Pin name
D15 / A–1
A0 to A23
D0 to D14
CE#
OE#
BYTE#
V
CC
V
SS
Functions
Data output / Address input
Address inputs
Data outputs
Chip enable input
Output enable input
Word / Byte select input
Power supply voltage
Ground
2/9
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