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UPD8155-2 fiches techniques PDF

NEC - 2048 BIT STATIC MOS RAM

Numéro de référence UPD8155-2
Description 2048 BIT STATIC MOS RAM
Fabricant NEC 
Logo NEC 





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UPD8155-2 fiche technique
NEe Microcomputers, Inc.
2048 BIT STATIC MOS RAM WITH
1/0 PORTS AND TIMER
NEe
fLPD8155
p.PD8155-2
fLPD8156
fLPD8156-2
OESCR IPTION
The J.LPDB1 55 and J.LPDB1 56 are J.LPDBOB5A family components having 256 X B Static
RAM, 3 programmable I/O ports and a programmable timer. They directly interface
to the multiplexed J.LPD80B5A bus with no external logic. The J.LPDB155 has an active
low chip enable while the J.LPDB1 56 is active high.
FEATURES.256XB·BitStaticRAM
• Two Programmable B·Bit I/O Ports
• One Programmable 6·Bit I/O Port
• Single Power Supplies: +5 Volt, ±10%
• Directly interfaces to the J.LPDB085A and J.LPD8085A·2
• Available in 40 Pin Plastic Packages
PIN CONFIGURATION
PC3
PC4
TIMER IN
RESET
PCs
TIMER OUT
101M
CE/CE*
AD
WR
ALE
ADO
ADl
AD2
AD3
AD4
ADS
AD6
AD7
Vss
IJPD
8155/
8156
*I'PD81S5: CE
I'PD8l56: CE
vcc
PC2
PCl
PCo
PB7
PB6
PBS
PB4
PB3
PB2
PBl
PBo
PA7
PA6
PAS
PA4
PA3
PA2
PAl
PAo
Rev/2
II
537

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