M27C256B-90B1 STMicroelectronics, M27C256B-90B1 Datasheet - Page 19

• Manufacturer Part Number: M27C256B-90B1
• Description: IC OTP 256KBIT 90NS 28DIP
• Manufacturer: STMicroelectronics

Specifications of M27C256B-90B1

• Format - Memory: EPROMs
• Memory Type: OTP EPROM
• Memory Size: 256K (32K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1653-5

M27C256B
5
Package mechanical
Figure 9.
1. Drawing is not to scale.
Table 12.
Symbol
A1
A2
A3
B1
D2
E1
eA
eB
C
D
N
A
B
E
S
e
L
FDIP28WB - 28 pin Ceramic Frit-seal DIP, with window, package outline
FDIP28WB - 28 pin Ceramic Frit-seal DIP, with window (round 0.280"),
package mechanical data
33.02
15.24
14.99
2.54
7.11
1.45
Typ
A2
B1
N
1
millimeters
S
36.50
13.06
16.18
0.51
3.91
3.89
0.41
0.23
3.18
1.52
Min
28
4°
–
–
–
–
–
–
D2
D
B
A1
e
37.34
13.36
18.03
Max
5.72
1.40
4.57
4.50
0.56
0.30
4.10
2.49
A3
E1
11°
–
–
–
–
–
–
A
L
E
0.057
1.300
0.600
0.100
0.590
0.280
Typ
eA
eB
FDIPW-a
C
inches
0.016
0.009
1.437
0.514
0.637
0.125
0.060
0.020
0.154
0.153
Package mechanical
Min
28
4°
–
–
–
–
–
–
0.225
0.055
0.180
0.177
0.022
0.012
1.470
0.526
0.710
0.161
0.098
Max
11°
–
–
–
–
–
–
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