# WS57C49C 64K UV Erasable RPROM

## Key Features
️· Ultra-Fast Access Time: 35ns, 45ns, 55ns, 70ns
️· Pin Compatible with Bipolar PROMs
️· Immune to Latch-Up (up to 200mA)
️· Low Power Consumption
️· ESD Protection (Exceeds 2000V)
️· Fast Programming
️· Available in DIP, CLLCC, and Flatpack packages

## General Description
️· High-Performance 64K UV Erasable Electrically Re-Programmable Read-Only Memory (RPROM)
️· CMOS technology for Bipolar PROM speeds with lower power consumption (25%)
️· Proven EPROM technology allows for 100% testing of switching characteristics
️· Compatible with standard Bipolar PROM pinout

## Product Selection Guide
️· Address Access Time: 35ns, 45ns, 55ns, 70ns
️· CS to Output Valid Time: 20ns, 25ns

## Ordering Information
️· Part Number: WS57C49C-[Speed]-[Package Type]
️· Speed: 35, 45, 55, 70 (ns)
️· Package Types:
- 28 Pad CLLCC
- 24 Pin CERDIP (0.3", 0.6")
- 24 Pin Ceramic Flatpack
️· Temperature Range: Military
️· Manufacturing Procedure: MIL-STD-883C

## Programming
️· Programmed using Algorithm D (see page 5-1)
️· Part marking does *not* include "WS" initials
️· SMD products available (see page 4-1 for DESC SMD numbers)
️· Complete data sheet and electrical specifications on page 2-39.