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M27C4002-80N1TR Datasheet(PDF) 4 Page - STMicroelectronics

No. de pieza M27C4002-80N1TR
Descripción Electrónicos  4 Mbit (256Kb x16) UV EPROM and OTP EPROM
Download  18 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M27C4002-80N1TR Datasheet(HTML) 4 Page - STMicroelectronics

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M27C4002
4/18
Standby Mode
The M27C4002 has a standby mode which reduc-
es the supply current from 50mA to 100µA. The
M27C4002 is placed in the standby mode by ap-
plyingaCMOS highsignal tothe E input. When in
the standby mode, the outputs are in a high imped-
ance state, independent of the G input.
Two Line Output Control
Because EPROMs are usually used in larger
memory arrays, the 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.
Table 5. AC Measurement Conditions
High Speed
Standard
Input Rise and Fall Times
≤ 10ns
≤ 20ns
Input Pulse Voltages
0 to 3V
0.4V to 2.4V
Input and Output Timing Ref. Voltages
1.5V
0.8V and 2V
Figure 3A. AC Testing Input Output Waveform
AI01822
3V
High Speed
0V
1.5V
2.4V
Standard
0.4V
2.0V
0.8V
Figure 4. AC Testing Load Circuit
AI01823B
1.3V
OUT
CL
CL = 30pF for High Speed
CL = 100pF for Standard
CL includes JIG capacitance
3.3k
1N914
DEVICE
UNDER
TEST
Table 6. Capacitance (1) (TA = 25 °C,f= 1 MHz)
Note: 1. Sampled only, not 100% tested.
Symbol
Parameter
Test Condition
Min
Max
Unit
CIN
Input Capacitance
VIN =0V
6pF
COUT
Output Capacitance
VOUT =0V
12
pF


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