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CY7C235A-25DMB Datasheet(PDF) 5 Page - Cypress Semiconductor

Part # CY7C235A-25DMB
Description  1K x 8 Registered PROM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C235A-25DMB Datasheet(HTML) 5 Page - Cypress Semiconductor

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CY7C235A
5
Table 1. Mode Selection.
Pin Function[8]
Read or Output Disable
A0, A3 − A9
A1
A2
CP
ES
E
INIT
O7 − O0
Mode
Other
A0, A3 − A9
A1
A2
PGM
VFY
E
VPP
D7 − D0
Read
A0, A3 − A9
A1
A2
X
VIL
VIL
VIH
O7 − O0
Output Disable
A0, A3 − A9
A1
A2
X
VIH
X
VIH
High Z
Output Disable
A0, A3 − A9
A1
A2
X
X
VIH
VIH
High Z
Initialize
A0, A3 − A9
A1
A2
X
X
VIL
VIL
Init Byte
Program
A0, A3 − A9
A1
A2
VILP
VIHP
VIHP
VPP
D7 − D0
Program Verify
A0, A3 − A9
A1
A2
VIHP
VILP
VIHP
VPP
O7 − O0
Program Inhibit
A0, A3 − A9
A1
A2
VIHP
VIHP
VIHP
VPP
High Z
Intelligent Program
A0, A3 − A9
A1
A2
VILP
VIHP
VIHP
VPP
D7 − D0
Program Initialize Byte
A0, A3 − A9
VPP
VILP
VILP
VIHP
VIHP
VPP
D7 − D0
Blank Check
A0, A3 − A9
A1
A2
VIHP
VILP
VIHP
VPP
Zeros
Notes:
8.
X = “don’t care” but not to exceed VCC ±5%.
Figure 1. Programming Pinouts.
C235A-8
C235A-9
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
24
23
22
21
13
14
A8
A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2
GND
VCC
D7
D6
D4
D5
D3
15
A9
E
VPP
VFY
PGM
28
4
5
6
7
8
9
10
32 1
27
1314151617
26
25
24
23
22
21
20
11
12
19
D0
18
NC
A0
A4
A3
D7
D6
A2
A1
E
VPP
VFY
PGM
NC
DIP
LCC/PLCC
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