CY7C1360V25 查看數據表（PDF） - Cypress Semiconductor
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CY7C1360V25 Datasheet PDF : 31 Pages
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PRELIMINARY
CY7C1360V25
CY7C1362V25
CY7C1364V25
256K x 36/256K x 32/512K x 18 Pipelined SRAM
Features
• Supports 200-MHz bus
• Fully registered inputs and outputs for pipelined
operation
• Single 2.5V power supply
• Fast clock-to-output times
— 3.1 ns (for 200-MHz device)
— 3.5 ns (for 166-MHz device)
— 4.0 ns (for 133-MHz device
— 5.0 ns (for 100-MHz device
• 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
• Available as a 100-pin TQFP or 119 BGA
• “ZZ” Sleep Mode option and Stop Clock option
Functional Description
The CY7C1360V25, CY7C1364V25 and CY7C1362V25 are
2.5V, 256K x 36, 256K x 32 and 512K x 18 synchronous-pipe-
lined cache SRAM, respectively. They are designed to support
zero wait state secondary cache with minimal glue logic.
Logic Block Diagram
All synchronous inputs pass through input registers controlled
by the rising edge of the clock. All data outputs pass through
output registers controlled by the rising edge of the clock. Max-
imum access delay from the clock rise is 3.1 ns (200-MHz
device).
The CY7C1360V25/CY7C1364V25/CY7C1362V25 supports
either the interleaved burst sequence used by the Intel Pen-
tium processor or a linear burst sequence used by processors
such as the PowerPC™. The burst sequence is selected
through the MODE pin. Accesses can be initiated by assert-
ing either the Processor Address Strobe (ADSP) or the Con-
troller Address Strobe (ADSC) at clock rise. Address advance-
ment through the burst sequence is controlled by the ADV
input. A 2-bit on-chip wraparound burst counter captures the
first address in a burst sequence and automatically increments
the address for the rest of the burst access.
Byte write operations are qualified with the Byte Write Select
(BWa,b,c,d for 1360V25/1364V25 and BWa,b for 1362V25) in-
puts. A Global Write Enable (GW) overrides all byte write in-
puts and writes data to all four bytes. All writes are conducted
with on-chip synchronous self-timed write circuitry.
Three synchronous Chip Selects (CE1, CE2, CE3) and an
asynchronous Output Enable (OE) provide for easy bank se-
lection and output three-state control. In order to provide prop-
er data during depth expansion, OE is masked during the first
clock of a read cycle when emerging from a deselected state.
CLK
AX
DQX
DPX
BWX
ADV
Ax
GW
CCEE12
CE3
BWE
BWx
MODE
ADSP
ADSC
ZZ
OE
CONTROL
and WRITE
LOGIC
1360V25
A[17:0]
DQa,b,c,d
DPa,b,c,d
BWa,b,c,d
1362V25
A[18:0]
DQa,b
DPa,b
BWa,b
1364V25
A[18:0]
DQa,b
NC
BWa,b
CE
DaDta-In
Q
REG.
256Kx36/
512Kx18
MEMORY
ARRAY
DQx
DPx
Intel and Pentium are registered trademarks of Intel Corporation.
PowerPC is a trademark of IBM Corporation.
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
December 3, 1999
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