Cypress Semiconductor CY7C1345G Specification Sheet

Features
128K x 36 common IO
■
3.3V core power supply (V
■
2.5V or 3.3V IO supply (V
■
Fast clock-to-output times
■
6.5 ns (133 MHz version)
❐
Provide high performance 2-1-1-1 access rate
■
User selectable burst counter supporting Intel Pentium inter-
■
leaved or linear burst sequences
Separate processor and controller address strobes
■
Synchronous self-timed write
■
Asynchronous output enable
■
Available in Pb-free 100-Pin TQFP package, Pb-free and
■
non-Pb-free 119-Ball BGA package
ZZ Sleep Mode option
■
Selection Guide
Maximum Access Time
Maximum Operating Current
Maximum Standby Current
Cypress Semiconductor Corporation
Document Number: 38-05517 Rev. *E
4-Mbit (128K x 36) Flow Through Sync SRAM
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DDQ
Parameter
• 198 Champion Court

Functional Description

The CY7C1345G is a 128K x 36 synchronous cache RAM
designed to interface with high speed microprocessors with
minimum glue logic. The maximum access delay from clock rise
is 6.5 ns (133 MHz version). A two-bit on-chip counter captures
the first address in a burst and increments the address automat-
ically for the rest of the burst access. 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
expansion Chip Enables (CE
(ADSC, ADSP, and ADV), Write Enables ( BW
Global Write (GW). Asynchronous inputs include the Output
Enable (OE) and the ZZ pin.
The CY7C1345G enables either interleaved or linear burst
sequences, selected by the MODE input pin. A HIGH selects an
interleaved burst sequence, while a LOW selects a linear burst
sequence. Burst accesses are initiated with the Processor
Address Strobe (ADSP) or the cache Controller Address Strobe
(ADSC) inputs.
Addresses and chip enables are registered at rising edge of
clock when either Address Strobe Processor (ADSP) or Address
Strobe Controller ( ADSC ) is active. Subsequent burst addresses
are internally generated as controlled by the Advance pin (ADV).
The CY7C1345G operates from a +3.3V core power supply
while all outputs operate with either a +2.5 or +3.3V supply. All
inputs and outputs are JEDEC standard JESD8-5 compatible.
For best practice recommendations, refer to the Cypress appli-
cation note AN1064, SRAM System
133 MHz
6.5
225
40
,
• San Jose CA 95134-1709
CY7C1345G
), depth
1
and CE ), Burst Control inputs
2 3
, and BWE), and
x
Guidelines.
100 MHz Unit
8.0 ns
205 mA
40 mA
• 408-943-2600
Revised July 15, 2007