WS27C256L Ver la hoja de datos (PDF) - STMicroelectronics
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WS27C256L Datasheet PDF : 5 Pages
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WS27C256L
MODE SELECTION
The modes of operation of the WS27C256L are listed below. A single 5 V power supply is required in the read
mode. All inputs are TTL levels except for VPP and A9 for device signature.
MODE
PINS CE/PGM OE
A9
A0
VPP
VCC OUTPUTS
Read
VIL
Output Disable
X
Standby
VIH
Programming
VIL
Program Verify
X
Program Inhibit
VIH
Signature
Manufacturer(13)
VIL
Device(13)
VIL
VIL
X
X
VCC
5.0 V
DOUT
VIH
X
X
VCC
5.0 V
High Z
X
X
X
VCC
5.0 V
High Z
VIH
X
X
VPP(12)
5.8 V
DIN
VIL
X
X
VPP(12)
5.8 V
DOUT
VIH
X
X
VPP(12)
5.0 V
High Z
VIL
VH(12)
VIL
VCC
5.0 V
23 H
VIL
VH(12)
VIH
VCC
5.0 V
C0 H
NOTES: 11. X can be VIL or VIH.
12. VH = VPP = 12.5 ± 0.5 V.
13. A1 – A8, A10 – A14 = VIL.
ORDERING INFORMATION
PART NUMBER
SPEED
(ns)
PACKAGE
TYPE
PACKAGE
DRAWING
OPERATING
TEMPERATURE
RANGE
WSI
MANUFACTURING
PROCEDURE
WS27C256L-12CMB* 120
32 Pad CLLCC
C2
WS27C256L-12DMB* 120
28 Pin CERDIP, 0.6"
D2
WS27C256L-12TMB* 120
28 Pin CERDIP, 0.3"
T2
WS27C256L-15DMB* 150
28 Pin CERDIP, 0.6"
D2
WS27C256L-15TMB* 150
28 Pin CERDIP, 0.3"
T2
WS27C256L-20DMB* 200
28 Pin CERDIP, 0.6"
D2
Military
Military
Military
Military
Military
Military
MIL-STD-883C
MIL-STD-883C
MIL-STD-883C
MIL-STD-883C
MIL-STD-883C
MIL-STD-883C
NOTE: The actual part marking will not include the initials "WS."
*SMD product. See page 4-1 for SMD number.
PROGRAMMING/ALGORITHMS/ERASURE/PROGRAMMERS
The WS27C256L is programmed using Algorithm C shown on page 5-7.
REFER TO
PAGE 5-1
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4-23
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