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M68Z128-55N1 Datasheet(PDF) 3 Page - STMicroelectronics

Part # M68Z128-55N1
Description  5V, 1 Mbit 128Kb x8 Low Power SRAM with Output Enable
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M68Z128-55N1 Datasheet(HTML) 3 Page - STMicroelectronics

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M68Z128
falling edge of E2, whichever occurs first, and re-
main valid for tWHDX, tE1HDX or tE2LDX.
OPERATIONAL MODE
The M68Z128 has a Chip Enable power down fea-
ture which invokes an automatic standby mode
whenever either Chip Enable is de-asserted (E1 =
High or E2 = Low). An Output Enable (G) signal
provides a high speed tri-state control, allowing
fast read/write cycles to be achieved with the com-
mon I/O data bus. Operational modes are deter-
mined by device control inputs W, E1, and E2 as
summarized in the Operating Modes table.
Table 3. Operating Modes
Note: 1. X = VIH or VIL.
Operation
E1
E2
W
G
DQ0-DQ7
Power
Read
VIL
VIH
VIH
VIH
Hi-Z
Active
Read
VIL
VIH
VIH
VIL
Data Output
Active
Write
VIL
VIH
VIL
X
Data Input
Active
Deselect
VIH
XX
X
Hi-Z
Standby
Deselect
X
VIL
X
X
Hi-Z
Standby
Table 4. AC Measurement Conditions
Note: Output Hi-Z is defined as the point where data is no longer
driven.
Input Rise and Fall Times
≤ 15ns
Input Pulse Voltages
0 to 3V
Input and Output Timing Ref. Voltages
1.5V
Figure 3. AC Testing Load Circuit
AI00658B
5.0V
OUT
CL = 50pF or 5pF
CL includes JIG capacitance
1800
DEVICE
UNDER
TEST
990
Table 5. Capacitance (1) (TA = 25 °C, f = 1 MHz)
Note: 1. Sampled only, not 100% tested.
2. Outputs deselected.
Symbol
Parameter
Test Condition
Min
Max
Unit
CIN
Input Capacitance on all pins (except DQ)
VIN = 0V
9pF
COUT
(2)
Output Capacitance
VOUT = 0V
9pF


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