CY7C133 Datasheet, PDF (1/13 Pages) Cypress Semiconductor – 2K x 16 Dual-Port Static RAM

CY7C133
CY7C143
2K x 16 Dual-Port Static RAM
Features
• True dual-ported memory cells which allow
simultaneous reads of the same memory location
• 2K x 16 organization
• 0.65-micron CMOS for optimum speed/power
• High-speed access: 25/35/55 ns
• Low operating power: I_CC = 150 mA (typ.)
• Fully asynchronous operation
• Master CY7C133 expands data bus width to 32 bits or
more using slave CY7C143
• BUSY output flag on CY7C133; BUSY input flag on
CY7C143
• Available in 68-pin PLCC
Logic Block Diagram
CE_L
R/W_LUB
Functional Description
The CY7C133 and CY7C143 are high-speed CMOS 2K by 16
dual-port static RAMs. Two ports are provided permitting
independent 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 currently being accessed by the other port. An
automatic power-down feature is controlled independently on
each port by the Chip Enable (CE) pin.
The CY7C133 and CY7C143 are available in 68-pin PLCC.
CE_R
R/W_RUB
R/W_LLB
OE_L
R/W_RLB
OE_R
I/O_8L – I/O_15L
I/O_0L – I/O_7L
BUSY_L[1]
A_10L
A_0L
I/O
CONTROL
I/O
CONTROL
ADDRESS
DECODER
MEMORY
ARRAY
ADDRESS
DECODER
CE _L
OE _L
R/W_LUB
R/W_LLB
ARBITRATION
LOGIC
(CY7C133 ONLY)
CE_R
OE_R
R/W_RUB
R/W_RLB
Note:
1. CY7C133 (Master): BUSY is open drain output and requires pull-up resistor. CY7C143 (Slave): BUSY is input.
I/O_8R – I/O_15R
I/O_0R – I/O_7R
1^{[ ]}
BUSY_R
A_10R
A_0R
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-06036 Rev. *B
Revised June 22, 2004