CY7C4251-10AI Cypress Semiconductor Corp, CY7C4251-10AI Datasheet - Page 4

• Manufacturer Part Number: CY7C4251-10AI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4251-10AI

• Configuration: Dual
• Density: 64Kb
• Access Time (max): 8ns
• Word Size: 9b
• Organization: 8Kx9
• Sync/async: Synchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: TQFP
• Clock Freq (max): 100MHz
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 40mA
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

Table 1. Pin Definitions (continued)
Document #: 38-06016 Rev. *D
RCLK
EF
FF
PAE
PAF
RS
OE
Pin
Read Clock
Empty Flag
Full Flag
Programmable
Almost Empty
Programmable
Almost Full
Reset
Output Enable
Name
I/O
O
O
O
O
I
I
I
The rising edge clocks data out of the FIFO when REN1 and REN2 are LOW and the
FIFO is not Empty. When WEN2/LD is LOW, RCLK reads data out of the programmable
flag-offset register.
When EF is LOW, the FIFO is empty. EF is synchronized to RCLK.
When FF is LOW, the FIFO is full. FF is synchronized to WCLK.
When PAE is LOW, the FIFO is almost empty based on the almost empty offset value
programmed into the FIFO.
When PAF is LOW, the FIFO is almost full based on the almost full offset value
programmed into the FIFO.
Resets device to empty condition. A reset is required before an initial read or write
operation after power up.
When OE is LOW, the FIFO’s data outputs drive the bus to which they are connected.
If OE is HIGH, the FIFO’s outputs are in High-Z (high-impedance) state.
Description
CY7C4421/4201/4211/4221
CY7C4231/4241/4251
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