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CY143 Datasheet

  • CY143

  • 2K x 16 Dual-Port Static RAM(193.25 k)

  • 195.76KB

  • 14頁(yè)

  • ETC

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CY7C133
CY7C143
2K x 16 Dual-Port Static RAM
Features
鈥?True dual-ported memory cells which allow
simultaneous reads of the same memory location
鈥?2K x 16 organization
鈥?0.65-micron CMOS for optimum speed/power
鈥?High-speed access: 25/35/55 ns
鈥?Low operating power: I
CC
= 150 mA (typ.)
鈥?Fully asynchronous operation
鈥?Master CY7C133 expands data bus width to 32 bits or
more using slave CY7C143
鈥?BUSY input flag on CY7C133; BUSY output flag on
CY7C143
鈥?Available in 68-pin PLCC
鈥?Pin-compatible and functionally equivalent to IDT7133
and IDT7143
Functional Description
The CY7C133 and CY7C143 are high-speed CMOS 2K by 16
dual-port static RAMs. Two ports are provided permitting inde-
pendent access to any location in memory. The CY7C133 can
be utilized as either a stand-alone 16-bit dual-port static RAM
or as a master dual-port RAM in conjunction with the CY7C143
slave dual-port device in systems requiring 32-bit or greater
word widths. It is the solution to applications requiring shared
or buffered data, such as cache memory for DSP, bit-slice, or
multiprocessor designs.
Each port has independent control pins; Chip Enable (CE),
Write Enable (R/W
UB
, R/W
LB
), and Output Enable (OE). BUSY
signals that the port is trying to access the same location cur-
rently being accessed by the other port. An automatic pow-
er-down feature is controlled independently on each port by
the Chip Enable (CE) pin.
The CY7C133 and CY7C143 are available in 68-pin PLCC.
Logic Block Diagram
CE
L
R/W
LUB
CE
R
R/W
RUB
R/W
LLB
OE
L
R/W
RLB
OE
R
I/O
8L
鈥?I/O
15L
I/O
0L
鈥?I/O
7L
BUSY
L[1]
A
10L
A
0L
ADDRESS
DECODER
I/O
CONTROL
I/O
CONTROL
I/O
8R
鈥?I/O
15R
I/O
0R
鈥?I/O
7R
BUSY
R
[
1
]
MEMORY
ARRAY
ADDRESS
DECODER
A
10R
A
0R
CE
L
OE
L
R/W
LUB
R/W
LLB
ARBITRA
TION
LOGIC
(CY7C133 ONLY)
CE
R
OE
R
R/W
RUB
R/W
RLB
C133-1
Note:
1. CY7C133 (Master): BUSY is open drain output and requires pull-up resistor. CY7C143 (Slave): BUSY is input.
Cypress Semiconductor Corporation
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134
鈥?/div>
408-943-2600
October 14, 1999

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