The IDT71028S70 is a 256K x 4 CMOS static RAM with features including equal access and cycle times (commercial: 70ns), one Chip Select plus one Output Enable pin, bidirectional data Inputs and outputs directly TTL-compatible, low power consumption via chip deselect, and available in 400 mil Plastic SOJ package.
The IDT71028 is a 1,048,576-bit medium-speed static RAM organized as 256K x 4. It is fabricated using Integrated Device Technology's high-performance, high-reliability CMOS technology and provides a cost-effective solution for memory needs.
The device features an output enable pin operating as fast as 30ns with address access times of 70ns. All bidirectional inputs and outputs are TTL-compatible, and operation is from a single 5V supply using fully static asynchronous circuitry that requires no clocks or refresh.
| Organization | 256K x 4-BIT |
|---|---|
| Capacity | 1,048,576-bit |
| Package Type | 28-pin 400 mil Plastic SOJ |
| Temperature Range | Commercial (0°C to +70°C) |
| Supply Voltage | 5.0V (+/- 10%) |
| Read Cycle Time (Max) | 70 ns |
The device operates within a commercial temperature range of 0 to +70 C.
The standby power supply current is a maximum of 35 mA when using TTL level inputs.
The write pulse width must be at least 45 ns to ensure proper operation.