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The P4C1257/P4C1257L are 256Kx1-bit ultra high-speed static RAMs. The CMOS memories require no clocks or refreshing and have equal access and cycle times. The RAMs operate from a single 5V ± 10% tolerance power supply. Data integrity is maintained for supply voltages down to 2.0V, typically drawing 10µA. Access times as fast as 12 nanoseconds are available,.
Full CMOS
High Speed (Equal Access and Cycle Times)
– 12/15/20/25 ns (Commercial)
– 12/15/20/25 ns (Industrial)
– 25/35/45/55/70 ns (Military)
Single 5V±10% Power Supply
Data Retention with 2.0V Power Supply (P4C1257L)
P4C1257/P4C1257L
ULTRA HIGH SPEED 256K x 1 STATIC CMOS RAMS
Separate Data I/O Three-State Output
Fully TTL Compatible Inputs and Outputs Standard Pinout (JEDEC Approved)
– 24-Pin 300 mil DIP, SOJ
– 28-Pin 350x550 mil LCC
– 28-Pin Flatpack
DESCRIPTION
The P4C1257/P4C1257L are 256Kx1-bit ultra high-speed static RAMs. The CMOS memories require no clock.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | P4C1256 |
PYRAMID |
HIGH SPEED 32K x 8 STATIC CMOS RAM |
|
| 2 | P4C1256L |
PYRAMID |
LOW POWER 32K x 8 STATIC CMOS RAM |
|
| 3 | P4C1256LL |
PYRAMID |
LOW POWER 32K x 8 STATIC CMOS RAM |
|
| 4 | P4C1257L |
PYRAMID |
STATIC CMOS RAM |
|
| 5 | P4C1258 |
PYRAMID |
ULTRA HIGH SPEED 64K x 4 STATIC CMOS RAM |
|
| 6 | P4C1281 |
PYRAMID |
STATIC CMOS RAM |
|
| 7 | P4C1282 |
PYRAMID |
STATIC CMOS RAM |
|
| 8 | P4C1298 |
PYRAMID |
ULTRA HIGH SPEED 64K x 4 STATIC CMOS RAM |
|
| 9 | P4C1298L |
PYRAMID |
ULTRA HIGH SPEED 64K x 4 STATIC CMOS RAM |
|
| 10 | P4C1299 |
PYRAMID |
STATIC CMOS RAM |
|
| 11 | P4C1299L |
PYRAMID |
STATIC CMOS RAM |
|
| 12 | P4C1023 |
Pyramid Semiconductor |
LOW POWER 128K x 8 SINGLE CHIP ENABLE CMOS STATIC RAM |
|