IS42S16400-7T Просмотр технического описания (PDF) - Integrated Circuit Solution Inc

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IS42S16400-7T

2(1)M Words x 8(16) Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM

Integrated Circuit Solution Inc 

IS42S8800/IS42S8800L

IS42S16400/IS42S16400L

PIN FUNCTIONS

Symbol

CLK

CKE

Type

Input Pin

Input Pin

CS

Input Pin

RAS, CAS, WE

A0-A11

Input Pin

Input Pin

BA0,BA1

DQM, UDQM ,LDQM

Input Pin

Input Pin

DQ0 to DQ15

VDD, VSS

VDDQ, VSSQ

I/O Pin

Power Supply Pin

Power Supply Pin

Function (In Detail)

Maste Clock: Other inputs signals are referenecd to the CLK rising edge

Clock Enable: CKE HIGH activates, and CKE LOW deactivates internal

clock signals,device input buffers and output drivers. Deactivating the clock

provides PRECHARGE POWER-DOWN and SELF REFRESH operation

(all banks idle), or ACTIVE POWER-DOWN (row ACTIVE in any bank).

Chip Select: +5 enables (registered LOW) and disables (registered HIGH)

the com-mand decoder. All commands are masked when +5 is registered

HIGH. +5 provides for external bank selection on systems with multiple

banks. +5 is considered part of the command code.

Command Inputs: RAS, CAS and WE (along with +5) define the command

being entered.

Address Inputs: Provide the row address for ACTIVE commands, and the

column address and AUTO PRECHARGE bit for READ/WRITE

commands, to select one loca-tion out of the memory array in the respec-

tive bank. The row address is specified by A0-A11. The column address is

specified by A0-A8 (IS42S8800) / A0-A7 (IS42S16400)

Bank Address Inputs: BA0 and BA1 define to which bank an ACTIVE,

READ, WRITE or PRECHARGE command is being applied.

Address Inputs: Provide the row address for ACTIVE commands (row

address A0-A10), and the column address and AUTO PRECHARGE bit for

READ/WRITE com-mands (column address A0-A7 with A10 defining

AUTO PRECHARGE), to select one location out of the memory array in the

respective bank.

IData Input / Output: Data bus.

Power Supply for the memory array and peripheral circuitry.

Power Supply are supplied to the output buffers only.

4

Integrated Circuit Solution Inc.

DR007-0A

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