SN54ALS873B, SN54AS873, SN74ALS873B, SN74AS873A
DUAL 4-BIT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SDAS036C – APRIL 1982 – REVISED SEPTEMBER 1994
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500
,
R2 = 500
,
TA = MIN to MAX
UNIT
SN54ALS873B
SN74ALS873B
MIN
MAX
MIN
MAX
tPLH
D
Q
2
23
2
14
ns
tPHL
D
Q
2
17
2
14
ns
tPLH
LE
Q
8
31
8
22
ns
tPHL
LE
Q
8
26
8
21
ns
tPHL
CLR
Q
6
27
6
20
ns
tPZH
OE
Q
4
24
4
18
ns
tPZL
OE
Q
4
23
4
18
ns
tPHZ
OE
Q
2
12
2
10
ns
tPLZ
OE
Q
2
30
2
15
ns
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output
5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54AS873
– 55
°C to 125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74AS873A
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
– 65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
recommended operating conditions
SN54AS873
SN74AS873A
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
IOH
High-level output current
–12
–15
mA
IOL
Low-level output current
32
48
mA
TA
Operating free-air temperature
–55
125
0
70
°C