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CY7C1371C 数据表(PDF) 1 Page - Cypress Semiconductor

部件名 CY7C1371C
功能描述  18-Mbit (512K x 36/1M x 18) Flow-Through SRAM with NoBL Architecture
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制造商  CYPRESS [Cypress Semiconductor]
网页  http://www.cypress.com
标志 CYPRESS - Cypress Semiconductor

CY7C1371C 数据表(HTML) 1 Page - Cypress Semiconductor

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18-Mbit (512K x 36/1M x 18) Flow-Through
SRAM with NoBL™ Architecture
CY7C1371C
CY7C1373C
Cypress Semiconductor Corporation
3901 North First Street
San Jose
, CA 95134
408-943-2600
Document #: 38-05234 Rev. *D
Revised June 03, 2004
Features
• No Bus Latency™ (NoBL™) architecture eliminates
dead cycles between write and read cycles
• Can support up to 133-MHz bus operations with zero
wait states
— Data is transferred on every clock
• Pin compatible and functionally equivalent to ZBT™
devices
• Internally self-timed output buffer control to eliminate
the need to use OE
• Registered inputs for flow-through operation
• Byte Write capability
• 3.3V/2.5V I/O power supply
• Fast clock-to-output times
— 6.5 ns (for 133-MHz device)
— 7.5 ns (for 117-MHz device)
— 8.5 ns (for 100-MHz device)
• Clock Enable (CEN) pin to enable clock and suspend
operation
• Synchronous self-timed writes
• Asynchronous Output Enable
• Offered in JEDEC-standard 100 TQFP, 119-Ball BGA and
165-Ball fBGA packages
• Three chip enables for simple depth expansion
• Automatic Power-down feature available using ZZ
mode or CE deselect
• JTAG boundary scan for BGA and fBGA packages
• Burst Capability—linear or interleaved burst order
• Low standby power
Functional Description[1]
The CY7C1371C/CY7C1373C is a 3.3V, 512K x 36/ 1M x 18
Synchronous Flow-through Burst SRAM designed specifically
to support unlimited true back-to-back Read/Write operations
without the insertion of wait states. The CY7C1371C/
CY7C1373C is equipped with the advanced No Bus Latency™
(NoBL™) logic required to enable consecutive Read/Write
operations with data being transferred on every clock cycle.
This feature dramatically improves the throughput of data
through the SRAM, especially in systems that require frequent
Write-Read transitions.
All synchronous inputs pass through input registers controlled
by the rising edge of the clock. The clock input is qualified by
the Clock Enable (CEN) signal, which when deasserted
suspends operation and extends the previous clock cycle.
Maximum access delay from the clock rise is 6.5 ns (133-MHz
device).
Write operations are controlled by the two or four Byte Write
Select (BWX) and a Write Enable (WE) input. All writes are
conducted with on-chip synchronous self-timed write circuitry.
Three synchronous Chip Enables (CE1, CE2, CE3) and an
asynchronous Output Enable (OE) provide for easy bank
selection and output tri-state control. In order to avoid bus
contention, the output drivers are synchronously tri-stated
during the data portion of a write sequence.
Selection Guide
133 MHz
117 MHz
100 MHz
Unit
Maximum Access Time
6.5
7.5
8.5
ns
Maximum Operating Current
210
190
175
mA
Maximum CMOS Standby Current
70
70
70
mA
Notes:
1. For best–practices recommendations, please refer to the Cypress application note System Design Guidelines on www.cypress.com.


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