OTP-EPROM, 256 Kb (32 K x 8) , 45 ns , 5 V, PDIP-28

256Kb (32-Kbit x 8) 5V OTP-EPROM

Description:

The Atmel® AT27C256R is a low power, high performance, 262,144-bit one-time programmable read-only memory (OTP EPROM) organized as 32K by 8 bits. It requires only a 5V power supply in normal reading mode. Each byte can be accessed in less than 45ns, eliminating the need for speed reducing WAIT states in high performance microprocessor systems. Atmel scaled CMOS technology offers low active power consumption and fast programming. Current consumption is typically only 8mA in active mode and less than 10µA in standby mode. The AT27C256R is available in a choice of JEDEC approved industry standard, once programmable (OTP) PDIP and PLCC packages. All devices feature dual line control (CE, OE) to give designers the flexibility to avoid bus conflicts. With a 32K byte memory capacity, the AT27C256R enables reliable firmware storage and system access without the delays of mass storage media. The AT27C256R has additional features to ensure high quality and efficient production use.
The fast programming algorithm reduces the time required to program the device and ensures reliable programming. The programming time is typically only 100µs/byte. The integrated product identification code electronically identifies the component and the manufacturer. This feature is used by industry standard programmers to select the correct programming algorithms and voltages.

Features
- Fast read access time - 45ns
- CMOS operation with low power consumption
- 100µA max Standby
- 20mA max. active at 5MHz
- JEDEC standard packages
- PDIP with 28 leads
- 32-channel PLCC
- 5V±10% Supply
- High reliability CMOS technology
- 2.000V ESD protection
- 200mA latch-up immunity
- Algorithm for fast programming - 100µs/byte (typical)
- CMOS and TTL compatible inputs and outputs
- Integrated Product Identification Code
- Industrial and automotive temperature ranges
- Green (Pb/fall water free) packaging option