CY7C4255-25AC Cypress Semiconductor Corp, CY7C4255-25AC Datasheet - Page 14

• Manufacturer Part Number: CY7C4255-25AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4255-25AC

• Density: 128Kb
• Word Size: 18b
• Sync/async: Synchronous
• Expandable: Yes
• Package Type: TQFP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

Switching Waveforms
HF/PAE/PAF
Read Expansion In Timing
Retransmit Timing
Notes:
async flags
33. Clocks are free-running in this case.
34. The flags may change state during Retransmit as a result of the offset of the read and write pointers, but flags will be valid at t
35. For the synchronous PAE and PAF flags (SMODE), an appropriate clock cycle is necessary after t
REN/WEN
and all
FL/RT
RCLK
EF/FF
RXI
[33, 34, 35]
(continued)
14
t
PRT
RTR
to update these flags.
t
XIS
t
XI
t
RTR
RTR
.
CY7C4255
CY7C4265
4255–22
4255–23