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E4809-436-091-C by Okuma

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The E4809-436-091-C is an SRAM card manufactured by Okuma and part of the E4809 CNC Boards series. This 2 MB memory board uses HM628128 128Kx8-bit SRAM chips (16 installed, pads for up to 24) with 70 ns access time. It features a 98-pin edge connector with gold fingers, a parallel interface, and operates on 5 V within -40°C to +85°C, ensuring reliable data storage for CNC control.

Technical Specifications

Access Time
70 ns
Chip Packaging
SOP or DIP
Chip Type
HM628128, 128K x 8-bit SRAM
Control Signals
OE, WE, CE
Data Bus Width
8–16 bits
Edge Connector
98-pin, gold fingers
Interface
Parallel
Memory Type
SRAM
Number of Chips
16
Operating Temperature
-40°C to +85°C
Operating Voltage
5 V
Total Chip Pads
24

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