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M27W202-150K6TR Datasheet(Folha de dados) 5 Page - STMicroelectronics

Nome de Peças. M27W202-150K6TR
descrição  2 Mbit 128Kb x16 Low Voltage UV EPROM and OTP EPROM
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Fbricantes  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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M27W202
Table 7. Read Mode DC Characteristics (1)
(TA = –40 to 85 °C; VCC = 2.7V to 3.6V; VPP =VCC)
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.
Symbol
Parameter
Test Condition
Min
Max
Unit
ILI
Input Leakage Current
0V
≤ VIN ≤ VCC
±10
µA
ILO
Output Leakage Current
0V
≤ VOUT ≤ VCC
±10
µA
ICC
Supply Current
E= VIL,G= VIL,
IOUT = 0mA, f = 5MHz
VCC ≤ 3.6V
20
mA
ICC1
Supply Current (Standby) TTL
E= VIH
1mA
ICC2
Supply Current (Standby) CMOS
E> VCC – 0.2V
VCC ≤ 3.6V
15
µA
IPP
Program Current
VPP =VCC
10
µA
VIL
Input Low Voltage
–0.6
0.2 VCC
V
VIH
(2)
Input High Voltage
0.7 VCC
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1mA
0.4
V
VOH
Output High Voltage TTL
IOH = –400µA
2.4
V
Two Line Output Control
Because OTP EPROMs are usually used in larger
memory arrays, this product features a 2 line con-
trol function which accommodates the use of mul-
tiple memory connection. The two line control
function allows:
a. the lowest possible memory power dissipation,
b. complete assurance that output bus contention
will not occur.
For the most efficient use of these two control
lines, E should be decoded and used as the prima-
ry device selecting function, while G should be
made a common connection to all devices in the
array and connected to the READ line from the
system control bus. This ensures that all deselect-
ed memory devices are in their low power standby
mode and that the output pins are only active
when data is required from a particular memory
device.
System Considerations
The power switching characteristics of Advanced
CMOS EPROMs require careful decoupling of the
devices. The supply current, ICC, has three seg-
ments that are of interest to the system designer:
the standby current level, the active current level,
and transient current peaks that are produced by
the falling and rising edges of E. The magnitude of
transient current peaks is dependent on the ca-
pacitive and inductive loading of the device at the
output. The associated transient voltage peaks
can be suppressed by complying with the two line
output control and by properly selected decoupling
capacitors. It is recommended that a 0.1
µF ceram-
ic capacitor be used on every device between VCC
and VSS. This should be a high frequency capaci-
tor of low inherent inductance and should be
placed as close to the device as possible. In addi-
tion, a 4.7
µF bulk electrolytic capacitor should be
used between VCC and VSS for every eight devic-
es. The bulk capacitor should be located near the
power supply connection point.The purpose of the
bulk capacitor is to overcome the voltage drop
caused by the inductive effects of PCB traces.




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