錚?/div>
interleaved or linear burst sequences
鈥?Separate processor and controller address strobes
鈥?Synchronous self-timed writes
鈥?Asynchronous Output Enable
鈥?JEDEC-standard 100-pin TQFP package and pinout
鈥?鈥淶Z鈥?Sleep Mode option
Functional Description
[1]
The CY7C1340F SRAM integrates 131,072 x 32 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:D]
, 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 four bytes wide as
controlled by the byte write control inputs. GW active LOW
causes all bytes to be written. This device incorporates an
additional pipelined enable register which delays turning off
the output buffers an additional cycle when a deselect is
executed.This feature allows depth expansion without penal-
izing system performance.
The CY7C1340F operates from a +3.3V core power supply
while all outputs operate with a +3.3V or a +2.5V supply. All
inputsand outputs are JEDEC-standard JESD8-5-compatible..
Selection Guide
250 MHz
Maximum Access Time
Maximum Operating Current
Maximum CMOS Standby Current
2.6
325
40
225 MHz
2.6
290
40
200 MHz
2.8
265
40
166 MHz
3.5
240
40
133 MHz
4.0
225
40
100 MHz
4.5
205
40
Unit
ns
mA
mA
Shaded areas contain advance information.
Please contact your local Cypress sales representative for availability of these parts.
Note:
1. For best-practices recommendations, please refer to the Cypress application note
System Design Guidelines
on www.cypress.com.
Cypress Semiconductor Corporation
Document #: 38-05219 Rev. *A
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
,
CA 95134
鈥?/div>
408-943-2600
Revised January 19, 2004
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