M68Z512NC View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M68Z512NC Datasheet PDF : 12 Pages
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M68Z512
Table 3. Operating Modes
Operation
E
W
Read
VIL
VIH
Read
VIL
VIH
Write
VIL
VIL
Deselect
VIH
X
Note: 1. X = VIH or VIL.
Table 4. AC Measurement Conditions
Input Rise and Fall Times
≤ 5ns
Input Pulse Voltages
0 to 3V
Input and Output Timing Ref. Voltages
1.5V
Note: Output Hi-Z is defined as the point where data is no longer
driven.
OPERATIONAL MODE
The M68Z512 has a Chip Enable power down fea-
ture which invokes an automatic standby mode
whenever Chip Enable is de-asserted (E = High).
An Output Enable (G) signal provides a high
speed tri-state control, allowing fast read/write cy-
cles to be achieved with the common I/O data bus.
Operational modes are determined by device con-
trol inputs W and E as summarized in the Operat-
ing Modes table.
G
DQ0-DQ7
VIH
Hi-Z
VIL
Data Output
X
Data Input
X
Hi-Z
Power
Active
Active
Active
Standby
Figure 3. AC Testing Load Circuit
5.0V
DEVICE
UNDER
TEST
994Ω
1838Ω
OUT
CL = 100pF or 5pF
CL includes JIG capacitance
AI03032
Table 5. Capacitance (1) (TA = 25°C, f = 1 MHz)
Symbol
Parameter
CIN Input Capacitance on all pins (except DQ)
COUT (2) Output Capacitance
Note: 1. Sampled only, not 100% tested.
2. Outputs deselected.
Test Condition
Min Max Unit
TA = 25°C, f = 1MHz, VCC = 5V
6
pF
TA = 25°C, f = 1MHz, VCC = 5V
8
pF
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