
TMS44400, TMS44400P, TMS46400, TMS46400P
1048576-WORD BY 4-BIT
DYNAMIC RANDOM-ACCESS MEMORIES
SMHS562C – MAY 1995 – REVISED NOVEMBER 1996
5
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
test mode (continued)
Test Mode Cycle
Entry Cycle
Exit Cycle
Normal
Mode
RAS
CAS
W
Figure 1. Test-Mode Cycle Timing
The states of W, data in, and address are defined by the type of cycle used during test mode.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
:
TMS44400, TMS44400P
TMS46400, TMS46400P
Voltage range on any pin (see Note 1) TMS44400, TMS44400P
TMS46400, TMS46400P
Short-circuit output current
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power dissipation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to VSS.
– 1.0 V to 7.0 V
– 0.5 V to 4.6 V
– 1.0 V to 7.0 V
– 0.5 V to 4.6 V
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
50 mA
1 W
0
°
C to 70
°
C
– 55
°
C to 150
°
C
recommended operating conditions
TMS44400/P
MIN
NOM
TMS46400/P
NOM
UNIT
MAX
MIN
MAX
VCC
VIH
VIL
TA
NOTE 2: The algebraic convention, where the more negative (less positive) limit is designated as minimum, is used for logic-voltage levels only.
Supply voltage
4.5
5
5.5
3
3.3
3.6
V
High-level input voltage
2.4
6.5
2
VCC + 0.3
0.8
V
Low-level input voltage (see Note 2)
– 1
0.8
– 0.3
V
Operating free-air temperature
0
70
0
70
°
C
A