參數(shù)資料
型號: CY7C1327G
廠商: Cypress Semiconductor Corp.
英文描述: 4-Mbit (256K x 18) Pipelined Sync SRAM(4-Mb (256K x 18)管道式同步SRAM)
中文描述: 4兆位(256 × 18)流水線同步靜態(tài)存儲器(4字節(jié)(256 × 18)管道式同步靜態(tài)存儲器)
文件頁數(shù): 1/18頁
文件大?。?/td> 372K
代理商: CY7C1327G
4-Mbit (256K x 18) Pipelined Sync SRAM
CY7C1327G
Cypress Semiconductor Corporation
Document #: 38-05519 Rev. *F
198 Champion Court
San Jose
,
CA 95134-1709
408-943-2600
Revised July 5, 2006
Features
Registered inputs and outputs for pipelined operation
256K ×18 common I/O architecture
3.3V core power supply (V
DD
)
2.5V I/O power supply (V
DDQ
)
Fast clock-to-output times
— 2.6 ns (for 250-MHz device)
Provide high-performance 3-1-1-1 access rate
User-selectable burst counter supporting Intel
Pentium
interleaved or linear burst sequences
Separate processor and controller address strobes
Synchronous self-timed writes
Asynchronous output enable
Offered in lead-free 100-pin TQFP package, lead-free
and non-lead-free 119-ball BGA package
“ZZ” Sleep Mode Option
Functional Description
[1]
The CY7C1327G SRAM integrates 256K x 18 SRAM cells with
advanced synchronous peripheral circuitry and a two-bit
counter for internal burst operation. All synchronous inputs are
gated by registers controlled by a positive-edge-triggered
Clock Input (CLK). The synchronous inputs include all
addresses, all data inputs, address-pipelining Chip Enable
(CE
1
), depth-expansion Chip Enables (CE
2
and CE
3
), Burst
Control inputs (ADSC, ADSP, and ADV), Write Enables
(BW
[A:B]
, and BWE), and Global Write (GW). Asynchronous
inputs include the Output Enable (OE) and the ZZ pin.
Addresses and chip enables are registered at rising edge of
clock when either Address Strobe Processor (ADSP) or
Address Strobe Controller (ADSC) are active. Subsequent
burst addresses can be internally generated as controlled by
the Advance pin (ADV).
Address, data inputs, and write controls are registered on-chip
to initiate a self-timed Write cycle.This part supports Byte Write
operations (see Pin Descriptions and Truth Table for further
details). Write cycles can be one to two bytes wide as
controlled by the byte write control inputs. GW when active
LOW causes all bytes to be written.
The CY7C1327G operates from a +3.3V core power supply
while all outputs also operate with a +3.3V or a +2.5V supply.
All inputs and outputs are JEDEC-standard JESD8-5-
compatible.
Note:
1. For best-practices recommendations, please refer to the Cypress application note
System Design Guidelines
on www.cypress.com.
Logic Block Diagram
A0, A1, A
ADDRESS
REGISTER
ADV
CLK
BURST
COUNTER AND
LOGIC
CLR
Q1
Q0
ADSC
BW
B
BW
A
BWE
CE
1
CE2
CE3
DQ
B,
DQP
B
WRITE REGISTER
DQ
A,
DQP
A
WRITE REGISTER
ENABLE
REGISTER
OE
SENSE
AMPS
MEMORY
ARRAY
ADSP
2
MODE
GW
PIPELINED
ENABLE
DQs
DQP
A
DQP
B
OUTPUT
REGISTERS
INPUT
REGISTERS
E
DQ
A,
DQP
A
WRITE DRIVER
OUTPUT
BUFFERS
DQ
B,
DQP
B
WRITE DRIVER
A[1:0]
ZZ
SLEEP
CONTROL
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