BRIGHT
Microelectronics
Inc.
Preliminary BM29F400T/BM29F400B
START
Read Byte(DQ0-DQ7)
Addr=Don't care
NO
DQ6=Toggle
YES
NO
DQ5=1
?
YES
Read Byte(DQ0-DQ7)
Addr=Don't care
NO
DQ6=Toggle
?
YES
Pass
Fail
Figure 4. Toggle Bit Algorithm
Note: DQ6 is rechecked even if DQ5 = logical "1" because DQ6 may stop toggling at the same time as DQ5 changing to a logical
"1".
Absolute Maximum Ratings
PARAMETER
Storage Temperature
RATING
-65 to +125
-55 to +125
UNIT
°C
Plastic Packages
Ambient Temperature
With Power Applied
°C
Voltages with Respect to Ground
All pins except A9 (Note 1)
Vcc (Note 1)
-2 to +7
-2 to +7
-2 to +14
200
V
A9 (Note 2)
Output Short Circuit Current (Note 4)
mA
Notes :
1. Minimum DC voltage on input or I/O pins is -0.5V.
During voltage transitions, inputs may overshoot Vss to -2.0V for periods of up to 20 nS. Maximum DC voltage on output and
I/O pins is Vcc +0.5V. During Voltage transitions, outputs may overshoot to Vcc + 2.0V for periods up to 20 nS.
2. Minimum DC input voltage on A9 pin is -0.5V. During voltage transitions, A9 may overshoot Vss to -2.0V for periods of up to
20 nS. Maximum DC input voltage on A9 is + 12.5V which may overshoot to 14.0V for periods of up to 20 nS.
3. No more than one output shorted at a time. Duration of the short circuit should not be greater than one second.
Operating Ranges
- 20 -
WINBOND [ WINBOND ]
