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PDF M27W256-120B6TR Data sheet ( Hoja de datos )

Número de pieza M27W256-120B6TR
Descripción 256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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M27W256
256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM
s 2.7V to 3.6V SUPPLY VOLTAGE in READ
OPERATION
s ACCESS TIME:
– 70ns at VCC = 3.0V to 3.6V
– 80ns at VCC = 2.7V to 3.6V
s PIN COMPATIBLE with M27C256B
s LOW POWER CONSUMPTION:
– 15µA max Standby Current
– 15mA max Active Current at 5MHz
s PROGRAMMING TIME 100µs/byte
s HIGH RELIABILITY CMOS TECHNOLOGY
– 2,000V ESD Protection
– 200mA Latchup Protection Immunity
s ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 3Dh
DESCRIPTION
The M27W256 is a low voltage 256 Kbit EPROM
offered in the two ranges UV (ultra violet erase)
and OTP (one time programmable). It is ideally
suited for microprocessor systems and is orga-
nized as 32,768 by 8 bits.
The M27W256 operates in the read mode with a
supply voltage as low as 3V. The decrease in op-
erating power allows either a reduction of the size
of the battery or an increase in the time between
battery recharges.
The FDIP28W (window ceramic frit-seal package)
has a transparent lid which allows the user to ex-
pose the chip to ultraviolet light to erase the bit pat-
tern. A new pattern can then be written to the
device by following the programming procedure.
For applications where the content is programmed
only one time and erasure is not required, the
M27W256 is offered in PDIP28, PLCC32 and
TSOP28 (8 x 13.4 mm) packages.
28
1
FDIP28W (F)
28
1
PDIP28 (B)
PLCC32 (K)
TSOP28 (N)
8 x 13.4mm
Figure 1. Logic Diagram
VCC VPP
15
A0-A14
8
Q0-Q7
E M27W256
G
VSS
AI03629
March 2000
1/15

1 page




M27W256-120B6TR pdf
M27W256
Table 7. Read Mode DC Characteristics (1)
(TA = –40 to 85°C; VCC = 2.7V to 3.6V; VPP = VCC)
Symbol
Parameter
Test Condition
Min
ILI Input Leakage Current
ILO Output Leakage Current
ICC Supply Current
ICC1 Supply Current (Standby) TTL
ICC2 Supply Current (Standby) CMOS
IPP Program Current
0V VIN VCC
0V VOUT VCC
E = VIL, G = VIL,
IOUT = 0mA, f = 5MHz,
VCC 3.6V
E = VIH
E > VCC – 0.2V,
VCC 3.6V
VPP = VCC
VIL Input Low Voltage
–0.6
VIH (2) Input High Voltage
0.7 VCC
VOL Output Low Voltage
IOL = 2.1mA
VOH Output High Voltage TTL
IOH = –400µA
2.4
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Maximum DC voltage on Output is VCC +0.5V.
Max
±10
±10
15
1
15
100
0.2 VCC
VCC + 0.5
0.4
Unit
µA
µA
mA
mA
µA
µA
V
V
V
V
Table 8. Read Mode AC Characteristics (1)
(TA = –40 to 85°C; VCC = 2.7V to 3.6V; VPP = VCC)
M27W256
Symbol Alt
Parameter
Test
Condition
-80 (3)
-100
(-120/-150/-200)
VCC = 3.0V to 3.6V VCC = 2.7V to 3.6V VCC = 2.7V to 3.6V
Unit
Min Max Min Max Min Max
tAVQV
tACC
Address Valid to
Output Valid
E = VIL,
G = VIL
70
80 100 ns
tELQV
tCE
Chip Enable Low to
Output Valid
G = VIL
70
80 100 ns
tGLQV
tOE
Output Enable Low
to Output Valid
E = VIL
40
50
60 ns
tEHQZ (2)
tDF
Chip Enable High
to Output Hi-Z
G = VIL
0
40
0
50
0
60 ns
tGHQZ (2)
tDF
Output Enable High
to Output Hi-Z
E = VIL
0
40
0
50
0
60 ns
tAXQX
tOH
Address Transition
to Output Transition
E = VIL,
G = VIL
0
0
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
3. Speed obtained with High Speed AC measurement conditions.
0
ns
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5 Page





M27W256-120B6TR arduino
M27W256
Table 12. FDIP28W - 28 pin Ceramic Frit-seal DIP, with window, Package Mechanical Data
mm inches
Symb
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
4° 11°
4° 11°
N 28
28
Figure 8. FDIP28W - 28 pin Ceramic Frit-seal DIP, with window, Package Outline
A2 A3 A
A1 L
B1 B e
D2
S
N
D
E1 E
1
Drawing is not to scale.
α
C
eA
eB
FDIPW-a
11/15

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