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CYDM256B16 Datasheet, PDF (1/25 Pages) Cypress Semiconductor – 1.8V 4K/8K/16K x 16 MoBL® Dual-Port Static RAM
CYDM256B16
CYDM128B16
CYDM064B16
1.8V 4K/8K/16K x 16
MoBL® Dual-Port Static RAM
Features
• True dual-ported memory cells that allow simultaneous
access of the same memory location
• 4/8/16K × 16 organization
• High-speed access: 40 ns
• Ultra Low operating power
— Active: ICC = 15 mA (typical) at 55 ns
— Active: ICC = 25 mA (typical) at 40 ns
— Standby: ISB3 = 2 µA (typical)
• Small footprint: Available in a 6x6 mm 100-pin
Lead(Pb)-free vfBGA
• Port-independent 1.8V, 2.5V, and 3.0V I/Os
• Full asynchronous operation
• Automatic power-down
• Pin select for Master or Slave
• Expandable data bus to 32 bits with Master/Slave chip
select when using more than one device
• On-chip arbitration logic
• Semaphores included to permit software handshaking
between ports
• Input Read Registers and Output Drive Registers
• INT flag for port-to-port communication
• Separate upper-byte and lower-byte control
• Industrial temperature ranges
Selection Guide for VCC = 1.8V
CYDM256B16, CYDM128B16,
CYDM064B16
-40
CYDM256B16, CYDM128B16,
CYDM064B16
-55
Port I/O Voltages (P1-P2)
1.8V-1.8V
1.8V-1.8V
Unit
Maximum Access Time
40
55
ns
Typical Operating Current
25
15
mA
Typical Standby Current for ISB1
2
Typical Standby Current for ISB3
2
2
µA
2
µA
Selection Guide for VCC = 2.5V
CYDM256B16, CYDM128B16,
CYDM064B16
-40
Port I/O Voltages (P1-P2)
2.5V-2.5V
Maximum Access Time
40
Typical Operating Current
39
Typical Standby Current for ISB1
6
Typical Standby Current for ISB3
4
Selection Guide for VCC = 3.0V
CYDM256B16, CYDM128B16,
CYDM064B16
-40
Port I/O Voltages (P1-P2)
3.0V-3.0V
Maximum Access Time
40
Typical Operating Current
49
Typical Standby Current for ISB1
7
Typical Standby Current for ISB3
6
CYDM256B16, CYDM128B16,
CYDM064B16
-55
2.5V-2.5V
55
28
6
4
CYDM256B16, CYDM128B16,
CYDM064B16
-55
3.0V-3.0V
55
42
7
6
Unit
ns
mA
µA
µA
Unit
ns
mA
µA
µA
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document #: 001-00217 Rev. *E
Revised January 25, 2007
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