AT28C256-15PU

Product Summary

The AT28C256-15PU is a high-performance Electrically Erasable and Programmable Read Only Memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmels advanced nonvolatile CMOS technology, the device offers access times to 150 ns with power dissipation of just 440 mW. When the AT28C256-15PU is deselected, the CMOS standby current is less than 200 mA. The AT28C256-15PU is accessed like a Static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writing of up to 64-bytes simultaneously. During a write cycle, the addresses and 1 to 64-bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a write cycle, the device will automatically write the latched data using an internal control timer.

Parametrics

AT28C256-15PU absolute maximum ratings: (1)Temperature Under Bias: -55°C to +125°C; (2)Storage Temperature: -65°C to +150°C; (3)All Input Voltages (including NC Pins)with Respect to Ground : -0.6V to +6.25V; (4)All Output Voltages with Respect to Ground : -0.6V to VCC + 0.6V; (5)Voltage on OE and A9 with Respect to Ground : -0.6V to +13.5V; (6)ILI Input Load Current VIN = 0V to VCC + 1V: 10 μA; (7)ILO Output Leakage Current VI/O = 0V to VCC: 10 μA; (8)ISB2 VCC Standby Current TTL CE = 2.0V to VCC + 1V: 3 mA; (9)ICC VCC Active Current f = 5 MHz; IOUT = 0 mA: 50 mA.

Features

AT28C256-15PU features: (1)Fast Read Access Time - 150 ns; (2)Automatic Page Write Operation Internal Address and Data Latches for 64-Bytes, Internal Control Timer; (3)Fast Write Cycle Times Page Write Cycle Time: 3 ms or 10 ms Maximum, 1 to 64-Byte Page Write Operation; (4)Low Power Dissipation; (5)50 mA Active Current, 200 mA CMOS Standby Current; (6)Hardware and Software Data Protection; (7)DATA Polling for End of Write Detection; (8)High Reliability CMOS Technology Endurance: 104 or 105 Cycles, Data Retention: 10 Years; (9)Single 5V ± 10% Supply CMOS and TTL Compatible Inputs and Outputs; (10)JEDEC Approved Byte-Wide Pinout; (11)Full Military, Commercial, and Industrial Temperature Ranges.

Diagrams