54AC11521 Datasheet, PDF (4/5 Pages) Texas Instruments – 8-BIT IDENTITY COMPARATORS

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54AC11521, 74AC11521
8-BIT IDENTITY COMPARATORS
SCAS022A – D2957, JULY 1987 – REVISED APRIL 1993
switching characteristics over recommended operating free-air temperature range,
V_CC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TA = 25°C
54AC11521 74AC11521
MIN TYP MAX MIN MAX MIN MAX
tPLH
tPHL
tPLH
tPHL
P or Q
G
P=Q
P=Q
1.5 12.5 16.6
1.5 10.5 14.1
1.5 7.1 9.8
1.5 6.4 8.8
1.5 20.4
1.5 17.4
1.5 11.4
1.5 10.8
1.5
19
1.5 16.1
1.5 10.8
1.5 10.1
UNIT
ns
ns
switching characteristics over recommended operating free-air temperature range,
V_CC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TA = 25°C
54AC11521 74AC11521
MIN TYP MAX MIN MAX MIN MAX
tPLH
tPHL
tPLH
tPHL
P or Q
G
P=Q
P=Q
1.5 8.3 11.3 1.5
14 1.5
13
1.5 7.2 10.1 1.5 12.2 1.5 11.4
1.5 5.1 7.1 1.5 8.4 1.5 7.9
1.5 4.8 7.1 1.5 8.6 1.5 8.1
UNIT
ns
ns
operating characteristics, V_CC = 5 V, T_A = 25°C
PARAMETER
Cpd Power dissipation capacitance
TEST CONDITIONS
CL = 50 pF,
f = 1 MHz
TYP UNIT
42
pF
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
500 Ω
Input
(see Note B)
tPHL
Output
50%
50%
VCC
0V
tPLH
50% VCC
VOH
50% VCC
VOL
LOAD CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. Input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
2–4
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