UPD4482181GF-A65 datasheet(11/28 Pages) NEC

Part #	UPD4482181GF-A65

Description	8M-BIT CMOS SYNCHRONOUS FAST SRAM FLOW THROUGH OPERATION

Download	28 Pages

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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11 / 28 page

11

µPD4482161, 4482181, 4482321, 4482361

Data Sheet M14521EJ3V0DS

Partial Truth Table for Write Enables

[

µµµµPD4482161, µµµµPD4482181]

Operation

/GW

/BWE

/BW1

/BW2

Read Cycle

H

××

Read Cycle

H

L

H

Write Cycle / Byte 1 (I/O [1:8], I/OP1)

H

L

H

Write Cycle / Byte 2 (I/O [9:16], I/OP2)

H

L

H

L

Write Cycle / All Bytes

H

L

Write Cycle / All Bytes

L

××

×

Remark

× : don’t care

[

µµµµPD4482321, µµµµPD4482361]

Operation

/GW

/BWE

/BW1

/BW2

/BW3

/BW4

Read Cycle

H

××

×

Read Cycle

H

L

H

Write Cycle / Byte 1 (I/O [1:8], I/OP1)

H

L

H

Write Cycle / Byte 2 (I/O [9:16], I/OP2)

H

L

H

L

H

Write Cycle / Byte 3 (I/O [17:24], I/OP3)

H

L

H

L

H

Write Cycle / Byte 4 (I/O [25:32], I/OP4)

H

L

H

L

Write Cycle / All Bytes

H

L

Write Cycle / All Bytes

L

××

×

Remark

× : don’t care

ZZ (Sleep) Truth Table

ZZ

Chip Status

≤ 0.2 V

Active

Open

Active

≥ VDD − 0.2 V

Sleep

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UPD4482181GF-A65 Datasheet(PDF) 11 Page - NEC

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