AT28C256-20PC Atmel, AT28C256-20PC Datasheet - Page 2

• Manufacturer Part Number: AT28C256-20PC
• Manufacturer: Atmel

Specifications of AT28C256-20PC

• Density: 256Kb
• Interface Type: Parallel
• Organization: 32Kx8
• Access Time (max): 200ns
• Write Protection: Yes
• Data Retention: 10Year
• Operating Supply Voltage (typ): 5V
• Package Type: PDIP
• Operating Temp Range: 0C to 70C
• Supply Current: 50mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 28
• Lead Free Status / Rohs Status: Not Compliant

2. Pin Configurations
2.1
2.2
2
Pin Name
A0 - A14
CE
OE
WE
I/O0 - I/O7
NC
DC
VCC
A11
A13
A14
A12
WE
OE
A9
A8
A7
A6
A5
A4
A3
28-lead TSOP Top View
28-lead PGA Top View
AT28C256
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
Don’t Connect
2.3
Note:
2.4
32-pad LCC, 28-lead PLCC Top View
PLCC package pins 1 and 17 are Don’t Connect.
28-lead Cerdip/PDIP/Flatpack/SOIC –
Top View
I/O0
NC
A6
A5
A4
A3
A2
A1
A0
GND
I/O0
I/O1
I/O2
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
29
28
27
26
25
24
23
22
21
VCC
WE
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
A8
A9
A11
NC
OE
A10
CE
I/O7
I/O6
0006K–PEEPR–01/08