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74LV74D 数据表(PDF) 7 Page - NXP Semiconductors

部件名 74LV74D
功能描述  Dual D-type flip-flop with set and reset; positive-edge trigger
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

74LV74D 数据表(HTML) 7 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74LV74
Dual D-type flip-flop with set and reset;
positive edge-trigger
1998 Apr 20
7
AC WAVEFORMS
VM = 1.5V at VCC w 2.7V v 3.6V
VM = 0.5 * VCC at VCC t 2.7V and w 4.5V
VOL and VOH are the typical output voltage drop that occur with the
output load.
nQ OUTPUT
VM
nD INPUT
nCP INPUT
nQ OUTPUT
VM
VM
VM
tsu
1/fmax
th
th
tPHL
tPHL
tPLH
tPLH
tW
GND
GND
VI
VI
VOL
VOL
VOH
VOH
tsu
SV00335
Figure 1.The clock (nCP) to output (nQ, nQ) propagation
delays, the clock pulse width, the nD to nCP setup times, the
nCP to nD hold times, the output transition times and the
maximum clock pulse frequency
NOTE:
The shaded areas indicate when the input is permitted to change for
predictable output performance.
nCP INPUT
nSD INPUT
nRD INPUT
nQ OUTPUT
nQ OUTPUT
GND
GND
GND
VI
VI
VI
VOL
VOL
VOH
VOH
VM
VM
VM
VM
trem
tPHL
tPLH
tW
tW
VM
tPLH
tPHL
SV00336
Figure 2.The set (nSD) and reset (nRD) input to output (nQ, nQ)
propagation delays, the set and reset pulse widths and the nRD
to nCP removal time
TEST CIRCUIT
PULSE
GENERATOR
RT
Vl
D.U.T.
VO
CL
RL= 1k
Vcc
Test Circuit for Outputs
DEFINITIONS
VCC
VI
< 2.7V
2.7–3.6V
VCC
2.7V
TEST
tPLH/tPHL
≥ 4.5 V
VCC
RL = Load resistor
CL = Load capacitance includes jig and probe capacitiance
50pF
RT = Termination resistance should be equal to ZOUT of pulse generators.
SV00902
Figure 3. Load circuitry for switching times


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