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74AC11874DW Folha de dados(PDF) 5 Page - Texas Instruments

Nome de Peças 74AC11874DW
Descrição Electrónicos  DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOP WITH 3-STATE OUTPUTS
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

74AC11874DW Folha de dados(HTML) 5 Page - Texas Instruments

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74AC11874
DUAL 4BIT DTYPE EDGETRIGGERED FLIPFLOP
WITH 3STATE OUTPUTS
SCAS236 − MARCH 1990 − REVISED APRIL 1993
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance per flip-flop
Outputs enabled
CL = 50 pF,
f = 1 MHz
31
pF
Cpd
Power dissipation capacitance per flip-flop
Outputs disabled
CL = 50 pF,
f = 1 MHz
13
pF
PARAMETER MEASUREMENT INFORMATION
th
tsu
From Output
Under Test
CL = 50 pF
LOAD CIRCUIT FOR OUTPUTS
S1
2
× VCC
Open
GND
500
500
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
2
× VCC
GND
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2
× VCC
(see Note C)
Output
Waveform 2
S1 at GND
(see Note C)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
50%
50%
≈ VCC
0 V
50% VCC
0 V
VCC
Data Input
Timing Input
50%
VCC
0 V
50%
50%
0 V
VCC
0 V
50%
50%
tw
Input
(see Note A)
50% VCC
20% VCC
80% VCC
tPLH
tPHL
50%
50%
0 V
50% VCC
50% VCC
VOH
VOL
Input
(see Note B)
Output
(see Note D)
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
VCC
VCC
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR
≤ 10 MHz, ZO = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns.
For testing pulse duration: tr = tf = 1 to 3 ns. Pulse polarity can be either high-to-low-to-high or low-to-high-to-low.
C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms


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