CY7C1441AV25
CY7C1443AV25
CY7C1447AV25
36-Mbit (1M x 36/2M x 18/512K x 72)
Flow-Through SRAM
Features
• Supports 133-MHz bus operations
• 1M x 36/2M x 18/512K x 72 common I/O
• 2.5V core power supply
• 2.5V/1.8V I/O power supply
• 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
®
interleaved or linear burst sequences
• Separate processor and controller address strobes
• Synchronous self-timed write
• Asynchronous output enable
• CY7C1441AV25, CY7C1443AV25 available in lead-free
100-pin TQFP package, lead-free and non-lead-free
165-ball FBGA package. CY7C1447AV25 available in
lead-free and non-lead-free 209-ball FBGA package
• JTAG boundary scan for FBGA package
• “ZZ” Sleep Mode option
Functional Description
[1]
The CY7C1441AV25/CY7C1443AV25/CY7C1447AV25 are 2.5V,
1M x 36/2M x 18/512K x 72 Synchronous Flow-through
SRAMs, respectively designed to interface with high-speed
microprocessors with minimum glue logic. Maximum access
delay from clock rise is 6.5 ns (133-MHz version). A 2-bit
on-chip counter captures the first address in a burst and incre-
ments the address automatically 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
1
), depth- expansion Chip
Enables (CE
2
and CE
3
), Burst Control inputs (ADSC, ADSP,
and ADV), Write Enables (BW
x
, and BWE), and Global Write
(GW). Asynchronous inputs include the Output Enable (OE)
and the ZZ pin.
The CY7C1441AV25/CY7C1443AV25/CY7C1447AV25 allows
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 can be initiated with the Processor Address Strobe
(ADSP) or the cache Controller Address Strobe (ADSC)
inputs. Address advancement is controlled by the Address
Advancement (ADV) input.
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).
The CY7C1441AV25/CY7C1443AV25/CY7C1447AV25
operates from a +2.5V core power supply while all outputs may
operate with either a +2.5V or 1.8V supply. All inputs and
outputs are JEDEC-standard JESD8-5-compatible.
Selection Guide
133 MHz
Maximum Access Time
Maximum Operating Current
Maximum CMOS Standby Current
6.5
270
120
100 MHz
8.5
250
120
Unit
ns
mA
mA
Note:
1. For best-practices recommendations, please refer to the Cypress application note
System Design Guidelines
on www.cypress.com.
Cypress Semiconductor Corporation
Document #: 38-05349 Rev. *F
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised June 21, 2006
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