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HT27LC040 Datasheet(PDF) 6 Page - Holtek Semiconductor Inc

Part No. HT27LC040
Description  CMOS 512K 8-Bit OTP EPROM
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Maker  HOLTEK [Holtek Semiconductor Inc]
Homepage  http://www.holtek.com
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HT27LC040 Datasheet(HTML) 6 Page - Holtek Semiconductor Inc

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Product Identification Code
Code
Pins
Hex
Data
A0
A1
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
Manufacturer
0100011100
1C
Device Type
1100000100
04
Continuation
0001111111
7F
1001111111
7F
HT27LC040
Rev. 1.30
6
December 8, 2003
Operation Mode Truth Table
All the operation modes are shown in the table following.
Mode
CE
OE
A0
A1
A9
VPP
Output
Read
VIL
VIL
XX
X
VCC
Dout
Output Disable
VIL
VIH
XX
X
VCC
High Z
Standby (TTL)
VIH
XX
X
X
VCC
High Z
Standby (CMOS)
VCC
± 0.3V
XX
X
X
VCC
High Z
Program
VIL
VIH
XX
X
VPP
DIN
Program Verify
X
VIL
XX
X
VPP
DOUT
Product Inhibit
VIH
XX
X
X
VPP
High Z
Manufacturer Code (3)
VIL
VIL
VIL
VIH
VH (1)
VCC
1C
Device Type Code (3)
VIL
VIL
VIH
VIH
VH (1)
VCC
04
Note:
(1) VH = 12.0V
± 0.5V
(2) X=Either VIH or VIL
(3) For Manufacturer Code and Device Code, A1=VIH, When A1=VIL, both codes will read 7F
O E
A d d r e s s
A d d r e s s V a l i d
t C E
t O E
t A C C
H I G H Z
O u t p u t V a l i d
t O H
t D F
O u t p u t
C E
Figure 1. A.C. Waveforms for Read Operation


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