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SN74AUC2G79 数据表(PDF) 6 Page - Texas Instruments

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部件名 SN74AUC2G79
功能描述  DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
Download  12 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

SN74AUC2G79 数据表(HTML) 6 Page - Texas Instruments

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PARAMETER MEASUREMENT INFORMATION
VCC/2
th
tsu
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
S1
2
× VCC
Open
GND
RL
RL
Data Input
Timing Input
VCC
0 V
VCC
0 V
0 V
tw
Input
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
PULSE DURATION
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
VCC
0 V
Input
Output
Waveform 1
S1 at 2
× VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOL
VOH
tPZL
tPZH
tPLZ
tPHZ
VCC
0 V
VOL + V
VOH - V
≈0 V
VCC
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
Output
Output
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2
× VCC
GND
TEST
S1
NOTES: A. CL includes probe and jig capacitance.
B. 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.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤ 10 MHz, ZO = 50 Ω, slew rate ≥ 1 V/ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Output
Control
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC/2
VCC
VCC/2
VCC/2
0.8 V
1.2 V
± 0.1 V
1.5 V
± 0.1 V
1.8 V
± 0.15 V
2.5 V
± 0.2 V
1.8 V
± 0.15 V
2.5 V
± 0.2 V
2 k
2 k
2 k
2 k
2 k
1 k
500
VCC
RL
0.1 V
0.1 V
0.1 V
0.15 V
0.15 V
0.15 V
0.15 V
V
CL
15 pF
15 pF
15 pF
15 pF
15 pF
30 pF
30 pF
SN74AUC2G79
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP
SCES536A – DECEMBER 2003 – REVISED MARCH 2005
Figure 1. Load Circuit and Voltage Waveforms
6


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