M27C256B
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Table 11. Ordering Information Scheme
Note: 1. High Speed, see AC Characteristics section for further information.
For a list of available options (Speed, Package, etc...) or for further information on any aspect of this de-
vice, please contact the STMicroelectronics Sales Office nearest to you.
Example: M27C256B -70 X C 1 TR
Device Type
M27
Supply Voltage
C = 5V
Device Function
256B = 256 Kbit (32Kb x 8)
Speed
-45
(1)
= 45 ns
-60 = 60 ns
-70 = 70 ns
-80 = 80 ns
-90 = 90 ns
-10 = 100 ns
-12 = 120 ns
-15 = 150 ns
-20 = 200 ns
-25 = 250 ns
V
CC
Tolerance
blank = ± 10%
X = ± 5%
Package
F = FDIP28W
B = PDIP28
C = PLCC32
N = TSOP28: 8 x 13.4 mm
Temperature Range
1 = 0 to 70 °C
3 = –40 to 125 °C
6 = –40 to 85 °C
Options
X = Additional Burn-in
TR = Tape & Reel Packing
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M27C256B
Table 12. Revision History
Date Version Revision Details
July 1998 1.0 First Issue
20-Sep-2000 1.1 AN620 Reference removed
29-Nov-2000 1.2 PLCC codification changed (Table 11)
02-Apr-2001 1.3 FDIP28W mechanical dimensions changed (Table 13)
29-Aug-2002 1.4
Package mechanical data clarified for PDIP28 (Table 14),
PLCC32 (Table 15, Figure 10) and TSOP28 (Table 16, Figure 11)
M27C256B
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Table 13. FDIP28W - 28 pin Ceramic Frit-seal DIP, with window, Package Mechanical Data
Symbol
millimeters inches
Typ Min Max Typ Min Max
A 5.72 0.225
A1 0.51 1.40 0.020 0.055
A2 3.91 4.57 0.154 0.180
A3 3.89 4.50 0.153 0.177
B 0.41 0.56 0.016 0.022
B1 1.45 0.057
C 0.23 0.30 0.009 0.012
D 36.50 37.34 1.437 1.470
D2 33.02 1.300
E 15.24 0.600
E1 13.06 13.36 0.514 0.526
e 2.54 0.100
eA 14.99 0.590
eB 16.18 18.03 0.637 0.710
L 3.18 4.10 0.125 0.161
S 1.52 2.49 0.060 0.098
7.11 0.280
α 1 4° 11°
N 28 28
Figure 8. FDIP28W - 28 pin Ceramic Frit-seal DIP, with window, Package Outline
Drawing is not to scale.
FDIPW-a
A3
A1
A
L
B1 B e
D
S
E1 E
N
1
C
α
eA
D2
eB
A2

M27C256B-70C6

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
EPROM 256K (32KX8) 70ns
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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