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M27C202-90N1TR 데이터시트(PDF) 4 Page - STMicroelectronics

부품명 M27C202-90N1TR
상세설명  2 Mbit (128Kb x16) UV EPROM and OTP EPROM
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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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 3. 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 Condit ion
Min
Max
Unit
CIN
Input Capacitance
VIN =0V
6pF
COUT
Output Capacitance
VOUT =0V
12
pF
DEVICE OPERATION
The operating modes of the M27C202 are listed in
the Operating Modes table. A single power supply
is required in the read mode. All inputs are TTL
levels except for VPP and 12V on A9 for Electronic
Signature.
Read Mode
The M27C202 has two control functions, both of
which must be logically active in order to obtain
data at the outputs. Chip Enable (E) is the power
control and should be used for device selection.
Output Enable (G) is the output control and should
be used to gate data to the output pins, indepen-
dent of device selection. Assuming that the ad-
dresses are stable, the address access time
(tAVQV) is equal to the delay from E to output
(tELQV). Data is available at the output after a delay
of tOE from the falling edge of G, assuming that E
has been low and the addresses have been stable
for at least tAVQV-tGLQV.
Standby Mode
The M27C202 has a standby mode which reduces
the supply current from 50mA to 100
µA.
The M27C202 is placed in the standby mode by
applying a TTL high signal to the E input. When in
the standby mode, the outputs are in a high imped-
ance state, independent of the G input.


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