JBP28L42 - 512x8 双极 PROM

JBP28L42是TI德州仪器公司的一款可编程逻辑产品，JBP28L42是512x8 双极 PROM，本站介绍了JBP28L42的封装应用图解、特点和优点、功能等，并给出了与JBP28L42相关的TI元器件型号供参考。

JBP28L42 - 512x8 双极 PROM - 可编程逻辑 - 特殊逻辑 - 德州仪器

产品描述

The 24 and 28 Series of monolithic TTL programmable read-only memories (PROMs) feature an expanded selection of standard and low-power PROMs. This expanded PROM family provides the system designer with considerable fexibility in upgrading existing designs or optimizing new designs. Featuring proven titanium-tungsten (Ti-W) fuse links with low-current MOS-compatible p-n-p inputs, all family members utilize a common programming technique designed to program each link with a 20-microsecond pulse.

The 4096-bit and 8192-bit PROMs are offered in a wide variety of packages ranging from 18-pin 300 mil-wide thru 24 pin 600 mil-wide. The 16,384-bit PROMs provide twice the bit density of the 8192-bit PROMs and are provided in a 24 pin 600 mil-wide package.

All PROMs are supplied with a logic-high output level stored at each bit location. The programming procedure will produce open-circuits in the Ti-W metal links, which reverses the stored logic level at the selected location. The procedure is irreversible; once altered, the output for that bit location is permanently programmed. Outputs that have never been altered may later be programmed to supply the opposite output level. Operation of the unit within the recommended operating conditions will not alter the memory content.

Active level(s) at the chip-select inputs(s) (S or S\) enables all of the outputs. An inactiv elevel at any chip-select input causes all outputs to be in the three-state, or off condition.

产品特性

Expanded Family of Standard and Low Power PROMs
Titanium-Tungstem (Ti-W) Fuse Links for Reliable Low-Voltage Full-Family-Compatible Programming
Full Decoding and Fast Chip Select Simplify System Design
P-N-P Inputs for Reduced Loading On System Buffers/Drivers
Each PROM Supplied With a High Logic Level Stored at Each Bit Location
Applications Include: Microprogramming/Firmware Loaders Code converters/Character Generators Translators/Emulators Address Mapping/Look-Up Tables

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