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| 74HC_HCT125_15 Datasheet, PDF (7/17 Pages) NXP Semiconductors – Quad buffer/line driver; 3-state | |||
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NXP Semiconductors
74HC125; 74HCT125
Quad buffer/line driver; 3-state
Table 7. Dynamic characteristics â¦continued
Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 7.
Symbol Parameter Conditions
25 ï°C
ï40 ï°C to +85 ï°C ï40 ï°C to +125 ï°C Unit
Min Typ Max Min Max
Min
Max
74HCT125
tpd
propagation nA to nY; see Figure 5
[1]
delay
VCC = 4.5 V
-
15 25
-
31
-
38 ns
VCC = 5 V; CL = 15 pF
-
12
-
-
-
-
-
ns
ten
enable time nOE to nY; see Figure 6 [2]
VCC = 4.5 V
-
15 28
-
35
-
42 ns
tdis
disable time nOE to nY; see Figure 6 [3]
VCC = 4.5 V
-
15 25
-
31
-
38 ns
tt
transition nY; see Figure 5
time
[4] -
5 12
-
15
-
18 ns
CPD
power
CL = 50 pF; f = 1 MHz;
[5] -
24 -
-
-
-
-
pF
dissipation VI = GND to VCC ï 1.5 V
capacitance
[1] tpd is the same as tPLH and tPHL.
[2] ten is the same as tPZH and tPZL.
[3] tdis is the same as tPLZ and tPHZ.
[4] tt is the same as tTHL and tTLH.
[5] CPD is used to determine the dynamic power dissipation (PD in ïW).
PD = CPD ï´ VCC2 ï´ fi ï´ N + ï¥(CL ï´ VCC2 ï´ fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
ï¥(CL ï´ VCC2 ï´ fo) = sum of outputs.
11. Waveforms
9,
Q$LQSXW
*1'
92+
Q<RXWSXW
92/
90
W3+/
90
W7+/
90
90
W3/+
W7/+
DDD
Fig 5.
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Propagation delay input (nA) to output (nY)
74HC_HCT125
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 â 19 January 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
7 of 17
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