SMJ27C256 32768 BY 8-BIT UV-ERASABLE PROGRAMMABLE READ-ONLY MEMORY

SGMS005F - MAY 1986 - REVISED SEPTEMBER 1997

features

Organization ...32768 by 8 Bits
MIL-STD-883 Class B High-Reliability Processing
Single 5-V Power Supply
Pin-Compatible With Existing 256K ROMs and EPROMs
All Inputs/Outputs Fully TTL Compatible
Max Access/Min Cycle Times
Power-Saving CMOS Technology
Very High-Speed SNAP! Pulse Programming
3-State Output Buffers
400-mV Minimum dc Noise Immunity With Standard TTL Loads
Latchup Immunity of 250 mA on All Input and Output Lines
Low Power Dissipation (CMOS Input Levels)
- Active ...165 mW Worst Case
- Standby...1.7 mW Worst Case
Military Operating Temperature Range - 55°C to 125°C

description

The SMJ27C256 series is a set of 262144-bit, ultraviolet-light erasable, electrically programmable read-only memories. These devices are fabricated using power-saving CMOS technology for high speed and simple interface with MOS and bipolar circuits. All inputs (including program data inputs) can be driven by Series 54 TTL circuits without the use of external pullup resistors. Each output can drive one Series 54 TTL circuit without external resistors. The data outputs are 3-state for connecting multiple devices to a common bus. The SMJ27C256 is pin-compatible with 28-pin 256K ROMs and EPROMs. It is offered in a 600-mil dual-in-line ceramic package (J suffix) rated for operation from -55°C to 125°C.

Because this EPROM operates from a single 5-V supply (in the read mode), it is ideal for use in microprocessor-based systems. One other supply (13 V) is needed for programming. All programming signals are TTL level. This device is programmable by the SNAP! Pulse programming algorithm. The SNAP! Pulse programming algorithm uses a V_PP of 13 V and a V_CC of 6.5 V for a nominal programming time of four seconds. For programming outside the system, existing EPROM programmers can be used. Locations can be programmed singly, in blocks, or at random.

Title: 32768 BY 8-BIT UV-ERASABLE PROGRAMMABLE READ-ONLY MEMORY
Product Family: EPROM
Device Functionality: EPROM-256K(32KX8)
Orderable Devices: SMJ27C256-15JM, SMJ27C256-17JM, SMJ27C256-20JM, SMJ27C256-25JM, SMJ27C256-30JM

View the complete PDF datasheet: sgms005f.pdf (158 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SMJ27C256

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