CY7C027_05 Datasheet, PDF (1/20 Pages) Cypress Semiconductor – 32K/64K x 16/18 Dual-Port Static RAM

CY7C027/028
CY7C037/03832K/64K x 16/18 Dual-Port Static RAM
CY7C027/028
CY7C037/038
32K/64K x 16/18 Dual-Port Static RAM
Features
• True Dual-Ported memory cells which allow simulta-
neous access of the same memory location
• 32K x 16 organization (CY7C027)
• 64K x 16 organization (CY7C028)
• 32K x 18 organization (CY7C037)
• 64K x 18 organization (CY7C038)
• 0.35-micron CMOS for optimum speed/power
• High-speed access: 12^[1]/15/20 ns
• Low operating power
— Active: I_CC = 180 mA (typical)
— Standby: I_SB3 = 0.05 mA (typical)
• Fully asynchronous operation
Logic Block Diagram
R/W_L
UB_L
• Automatic power-down
• Expandable data bus to 32/36 bits or more using
Master/Slave chip select when using more than one
device
• On-chip arbitration logic
• Semaphores included to permit software handshaking
between ports
• INT flags for port-to-port communication
• Separate upper-byte and lower-byte control
• Dual Chip Enables
• Pin select for Master or Slave
• Commercial and industrial temperature ranges
• Available in 100-pin TQFP
• Pb-Free packages available
R/W_R
UB_R
CE_0L
CE_1L
LB_L
OE_L
CE_L
I/O_8/9L–I/O^[₁²₅^] _/17L
8/9
I/O_0L–I/O^[₇³_/^]_8L
8/9
I/O
Control
I/O
Control
CE_R
CE_0R
CE_1R
LB_R
OE_R
8/9
[2]
I/O_8/9L–I/O_15/17R
8/9
I/O_0L–I/O^[₇³_/^]_8R
A_0L–A^[₁⁴₄^]_/15L
15/16
Address
Decode
True Dual-Ported
RAM Array
Address
Decode
15/16
A_0R–A^[₁⁴₄^]_/15R
A_0L–A^[₁⁴₄^]_/15L
15/16
CE_L
OE_L
R/W_L
SEM_L
BUSY_L^[5]
INT_L
UB_L
LB_L
Notes:
1. See page 6 for Load Conditions.
2. I/O₈–I/O₁₅ for x16 devices; I/O₉–I/O₁₇ for x18 devices.
3. I/O₀–I/O₇ for x16 devices; I/O₀–I/O₈ for x18 devices.
4. A₀–A₁₄ for 32K; A₀–A₁₅ for 64K devices.
5. BUSY is an output in master mode and an input in slave mode.
Interrupt
Semaphore
Arbitration
M/S
15/16
A_0R–A^[₁⁴₄^]_/15R
CE_R
OE_R
R/W_R
SEM_R
[5] _BUSYR
INT_R
UB_R
LB_R
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-06042 Rev. *C
Revised June 13, 2005