PRELIMINARY
36-Mbit (1M x 36/2M x 18/512K x 72)
Pipelined Sync SRAM
CY7C1440AV33
CY7C1442AV33
CY7C1446AV33
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
, CA 95134
•
408-943-2600
Document #: 38-05383 Rev. *B
Revised January 31, 2005
Features
• Supports bus operation up to 250 MHz
• Available speed grades are 250, 200,167 MHz
• Registered inputs and outputs for pipelined operation
• 3.3V core power supply
• 2.5V/3.3V I/O operation
• Fast clock-to-output times
— 2.6 ns (for 250-MHz device)
— 3.2 ns (for 200-MHz device)
— 3.4 ns (for 167-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
• Single Cycle Chip Deselect
• Offered in JEDEC-standard 100-pin TQFP, 165-Ball
fBGA and 209-Ball fBGA packages
• Also available in lead-free packages
• IEEE 1149.1 JTAG-Compatible Boundary Scan
• “ZZ” Sleep Mode Option
Functional Description[1]
The CY7C1440AV33/CY7C1442AV33/CY7C1446AV33 SRAM
integrates 1,048,576 x 36, 2,097,152 x 18 and 524,288 x 72
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 (CE1), depth-expansion Chip Enables (CE2 and
CE3
[2]), Burst Control inputs (ADSC, ADSP, and ADV), Write
Enables
(BWX 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 or four bytes wide as
controlled by the byte write control inputs. GW when active
LOW causes all bytes to be written.
The
CY7C1440AV33/CY7C1442AV33/CY7C1446AV33
operates from a +3.3V core power supply while all outputs may
operate with either a +2.5 or +3.3V supply. All inputs and
outputs are JEDEC-standard JESD8-5-compatible.
Selection Guide
250 MHz
200 MHz
167 MHz
Unit
Maximum Access Time
2.6
3.2
3.4
ns
Maximum Operating Current
475
425
375
mA
Maximum CMOS Standby Current
100
100
100
mA
Shaded areas contain advance information. Please contact your local Cypress sales representative for availability of these parts.
Notes:
1. For best-practices recommendations, please refer to the Cypress application note System Design Guidelines on www.cypress.com.
2. CE3, CE2 are for TQFP and 165 fBGA package only.
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