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NXP Semiconductors	74HC151; 74HCT151
	8-input multiplexer

10. Dynamic characteristics

Table 7. Dynamic characteristics

Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 7.

Symbol	Parameter	Conditions								Tamb = 25 C			Tamb = 40 C		Tamb = 40 C		Unit
													to +85 C		to +125 C
										Min	Typ	Max	Min	Max	Min	Max
For type 74HC151

tpd	propagation	In to Y; see Figure 5							[1]
	delay
	delay		VCC = 2.0 V						-		52	170	-	215	-	255	ns
			VCC = 2.0 V						-		52	170	-	215	-	255	ns
			VCC = 4.5 V						-		19	34	-	43	-	51	ns
			VCC = 5 V; CL = 15 pF						-		17	-	-	-	-	-	ns
			VCC = 6.0 V						-		15	29	-	37	-	43	ns
		In to							[1]
		In to				Y; see Figure 5			[1]

			VCC = 2.0 V						-		58	185	-	230	-	280	ns
			VCC = 4.5 V						-		21	37	-	46	-	56	ns
			VCC = 5 V; CL = 15 pF						-		17	-	-	-	-	-	ns
			VCC = 6.0 V						-		17	31	-	39	-	48	ns
		Sn to Y; see Figure 6							[1]

			VCC = 2.0 V						-		61	185	-	230	-	280	ns
			VCC = 4.5 V						-		22	37	-	46	-	56	ns
			VCC = 5 V; CL = 15 pF						-		19	-	-	-	-	-	ns
			VCC = 6.0 V						-		18	31	-	39	-	48	ns
		Sn to							[1]
		Sn to					Y; see Figure 6		[1]

			VCC = 2.0 V						-		61	205	-	255	-	310	ns
			VCC = 4.5 V						-		22	41	-	51	-	62	ns
			VCC = 5 V; CL = 15 pF						-		19	-	-	-	-	-	ns
			VCC = 6.0 V						-		18	35	-	43	-	53	ns
			to Y; see Figure 6
		E	to Y; see Figure 6

			VCC = 2.0 V						-		41	125	-	155	-	190	ns
			VCC = 4.5 V						-		15	25	-	31	-	38	ns
			VCC = 5 V; CL = 15 pF						-		12	-	-	-	-	-	ns
			VCC = 6.0 V						-		12	21	-	26	-	32	ns
			to
		E	to		Y; see Figure 6

			VCC = 2.0 V						-		47	145	-	180	-	220	ns
			VCC = 4.5 V						-		17	29	-	36	-	44	ns
			VCC = 5 V; CL = 15 pF						-		14	-	-	-	-	-	ns
			VCC = 6.0 V						-		14	25	-	31	-	38	ns
tt	transition	Y,							[2]
tt	transition	Y,		Y; see Figure 5					[2]
	time
	time		VCC = 2.0 V						-		19	75	-	95	-	110	ns
			VCC = 2.0 V						-		19	75	-	95	-	110	ns
			VCC = 4.5 V						-		7	15	-	19	-	22	ns
			VCC = 6.0 V						-		6	13	-	16	-	19	ns
74HC_HCT151								All information provided in this document is subject to legal disclaimers.							© NXP B.V. 2013. All rights reserved.

Product data sheet

Rev. 4 — 11 February 2013

8 of 19

NXP Semiconductors	74HC151; 74HCT151
	8-input multiplexer

Table 7. Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 7.

Symbol	Parameter	Conditions							Tamb = 25 C			Tamb = 40 C		Tamb = 40 C		Unit
												to +85 C		to +125 C
									Min	Typ	Max	Min	Max	Min	Max
CPD	power	CL = 50 pF; f = 1 MHz;						[3]	-	40	-	-	-	-	-	pF
	dissipation	VI = GND to VCC
	capacitance

For type 74HCT151

tpd	propagation	In to Y; see Figure 5						[1]
	delay
	delay		VCC = 4.5 V						-	22	38	-	48	-	57	ns
			VCC = 4.5 V						-	22	38	-	48	-	57	ns
			VCC = 5 V; CL = 15 pF						-	19	-	-	-	-	-	ns
		In to						[1]
		In to				Y; see Figure 5		[1]

			VCC = 4.5 V						-	22	38	-	48	-	57	ns
			VCC = 5 V; CL = 15 pF						-	19	-	-	-	-	-	ns
		Sn to Y; see Figure 6						[1]

			VCC = 4.5 V						-	23	41	-	51	-	62	ns
			VCC = 5 V; CL = 15 pF						-	20	-	-	-	-	-	ns
		Sn to						[1]
		Sn to					Y; see Figure 6	[1]

			VCC = 4.5 V						-	25	43	-	54	-	65	ns
			VCC = 5 V; CL = 15 pF						-	20	-	-	-	-	-	ns
			to Y; see Figure 6					[1]
		E	to Y; see Figure 6					[1]

			VCC = 4.5 V						-	16	29	-	36	-	44	ns
			VCC = 5 V; CL = 15 pF						-	13	-	-	-	-	-	ns
			to					[1]
		E	to		Y; see Figure 6			[1]

			VCC = 4.5 V						-	21	36	-	45	-	54	ns
			VCC = 5 V; CL = 15 pF						-	18	-	-	-	-	-	ns
tt	transition	Y,						[2]
tt	transition	Y,		Y; see Figure 5				[2]
	time
	time		VCC = 4.5 V						-	7	15	-	19	-	22	ns
			VCC = 4.5 V						-	7	15	-	19	-	22	ns
CPD	power	CL = 50 pF; f = 1 MHz;						[3]	-	40	-	-	-	-	-	pF
	dissipation	VI = GND to VCC
	capacitance

[1]tpd is the same as tPLH and tPHL.

[2]tt is the same as tTHL and tTLH.

[3]CPD is used to determine the dynamic power dissipation (PD in W). PD = CPD VCC2 fi N + (CL VCC2 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;(CL VCC2 fo) = sum of outputs.

74HC_HCT151

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4 — 11 February 2013

9 of 19

NXP Semiconductors	74HC151; 74HCT151
	8-input multiplexer

11. Waveforms


#$#"!


		%

	! "!
		%
		%


		%

	! "!
		%
		%

Measurement points are given in Table 8.

VOL and VOH are typical voltage output levels that occur with the output load.

Fig 5. Propagation delay input (In) to output (Y, Y) and the output (Y, Y) transition time


#&$#"!


		%

	! "!
		%
		%


		%

	! "!
		%
		%

Measurement points are given in Table 8.

VOL and VOH are typical voltage output levels that occur with the output load.

Fig 6. Propagation delay input (Sn, E) to output (Y, Y) and output (Y, Y) transitions time

74HC_HCT151

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4 — 11 February 2013

10 of 19

NXP Semiconductors

74HC151; 74HCT151

8-input multiplexer

Table 8.

Measurement points

Type

Input

Output

74HC151

0.5VCC

74HCT151

1.3 V

90 %

negative

pulse

10 %

GND

90 %

positive

pulse

GND 10 %

VCC

DUT

001aah768

Test data is given in Table 9.

Definitions test circuit:

RT = Termination resistance should be equal to output impedance Zo of the pulse generator.

CL = Load capacitance including jig and probe capacitance.

RL = Load resistance.

S1 = Test selection switch.

Fig 7. Test circuit for measuring switching times

Table 9.	Test data

Type		Input		Load	Test
		VI	tr, tf	CL
74HC151		VCC	6.0 ns	15 pF, 50 pF	tPLH, tPHL
74HCT151		3.0 V	6.0 ns	15 pF, 50 pF	tPLH, tPHL

74HC_HCT151

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4 — 11 February 2013

11 of 19

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