CY7C277-50WMB Cypress Semiconductor Corp, CY7C277-50WMB Datasheet - Page 5

• Manufacturer Part Number: CY7C277-50WMB
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C277-50WMB

• Density: 256Kb
• Organization: 32Kx8
• Access Time (max): 25ns
• Operating Current: 130mA
• Interface Type: Parallel
• Package Type: Windowed CDIP
• Operating Temperature Classification: Military
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: -55C to 125C
• Pin Count: 28
• Mounting: Through Hole
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Not Compliant

Programming Information
Programming support is available from Cypress as well as
from a number of third-party software vendors. For detailed
Table 1. Mode Selection
Read
Output Disable
Program
Program Verify
Program Inhibit
Blank Check
Notes:
10. X = “don’t care” but not to exceed V
Mode
Read or Output Disable
Other
GND
D
D
D
A
A
A
A
A
A
A
A
A
A
9
8
7
5
4
3
2
1
0
0
1
2
6
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
5%.
Top View
DIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A
A
A
A
A
A
A
A
14
14
14
14
14
14
14
14
Figure 1. Programming Pinouts
V
A
A
A
A
A
V
PGM
VFY
D
D
D
D
D
C277-10
- A
- A
- A
- A
- A
- A
- A
- A
CC
10
11
12
13
14
PP
7
6
5
4
3
0
0
0
0
0
0
0
0
E, E
VFY
V
V
V
V
V
V
IHP
IHP
5
ILP
ILP
IH
IL
S
programming information, including a listing of software pack-
ages, please see the PROM Programming Information located
at the end of this section. Programming algorithms can be ob-
tained from any Cypress representative.
NC
LCC/PLCC (Opaque Only)
A
A
A
A
A
A
A
D
6
5
4
3
2
1
0
0
5
6
7
8
9
10
11
12
13
Pin Function
14151617
V
V
4
IHP
IHP
PGM
3 2 1
Top View
V
V
CP
V
X
ILP
IHP
IH
/V
/V
ILP
ILP
32
181920
31
30
29
28
27
26
25
24
23
22
21
[10]
A
A
A
NC
V
PGM
VFY
D
D
C277-11
12
13
14
PP
7
6
ALE
V
V
V
V
V
V
X
PP
PP
PP
PP
PP
IL
CY7C277
O
D
O
O
O
High Z
D
High Z
7
7
7
7
7
7
- O
- D
- O
- D
- O
- O
0
0
0
0
0
0