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UPD23128 fiches techniques PDF

NEC - FULLY DECODED 128K-BIT MASK PROGRAMMABLE READ ONLY MEMORY

Numéro de référence UPD23128
Description FULLY DECODED 128K-BIT MASK PROGRAMMABLE READ ONLY MEMORY
Fabricant NEC 
Logo NEC 





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UPD23128 fiche technique
NEe
NEe Microcomputers, Inc.
}LPD23128
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FULLY DECODED 128K BIT MASK
PROGRAMMABLE READ ONLY MEMORY
OESCR I PTION
The NEC IlPD23128 is a high speed 128K bit mask programmable Read Only Memory
organized as 16,384 words by 8 bits. The IlPD23128 is fabricated with N·channel
MOS technology.
The inputs and outputs are fully TTL compatible. This device operates with a single
+5V power supply. The chip select input is programmable. An active high or low level
chip select input can be defined and is fixed during the masking process.
II
FEATU RES
16,384 Words x 8 Bits Organization
• Directly TTL Compatible - All Inputs and Outputs
• Single +5V Power Supply
• High Speed - Access Time 250 ns Max.
• Three-State Output - OR-Tie Capability
• One Programmable Chip Select Input for Easy Memory Expansion
• On-Chip Address Fully Decoded
• All Inputs Protected Against Static Charge
• Pin Compatible with 2764
• Available in 28 Pin Ceramic or Plastic Dual-in-Line Package
PIN CONFIGURATION
NC
A12
A7
Ae
A5
A4
Aa
A2
A1
Ao
01
02
03
VCC
CS
AO- A13
01 ~08
CS
00
CE
PIN NAMES
Address Inputs
Data Outputs
Programmable Chip Select
Output Disable
Chip Enable
04
Rev/1
129

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