M27C801-120B1X データシートの表示（PDF） - STMicroelectronics
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M27C801-120B1X Datasheet PDF : 16 Pages
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M27C801
Table 5. AC Measurement Conditions
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
High Speed
≤ 10ns
0 to 3V
1.5V
Standard
≤ 20ns (10% to 90%)
0.4 to 2.4V
0.8 and 2V
Figure 3. AC Testing Input Output Waveform
High Speed
3V
0V
Standard
2.4V
0.4V
1.5V
2.0V
0.8V
AI01822
Figure 4. AC Testing Load Circuit
1.3V
1N914
DEVICE
UNDER
TEST
3.3kΩ
CL
OUT
CL = 30pF for High Speed
CL = 100pF for Standard
CL includes JIG capacitance
AI01823B
Table 6. Capacitance (1) (TA = 25 °C, f = 1 MHz)
Symbol
Parameter
Test Condition
CIN
Input Capacitance
VIN = 0V
COUT
Output Capacitance
Note: 1. Sampled only, not 100% tested.
VOUT = 0V
Min
Max
Unit
6
pF
12
pF
DEVICE OPERATION
The operating modes of the M27C801 are listed in
the Operating Modes table. A single power supply
is required in the read mode. All inputs are TTL
levels except for GVPP and 12V on A9 for Elec-
tronic Signature and Margin Mode Set or Reset.
Read Mode
The M27C801 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 tGLQV from the falling edge of G, assuming that
E has been low and the addresses have been sta-
ble for at least tAVQV-tGLQV.
Standby Mode
The M27C801 has a standby mode which reduces
the supply current from 35mA to 100µA.
The M27C801 is placed in the standby mode by
applying a CMOS high signal to the E input. When
in the standby mode, the outputs are in a high im-
pedance state, independent of the GVPP input.
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