Philips 74HCT4351U, 74HCT4351N, 74HCT4351DB, 74HCT4351D, 74HC4351N Datasheet

INTEGRATED CIRCUITS

DATA SHEET

For a complete data sheet, please also download:

∙The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications

∙The IC06 74HC/HCT/HCU/HCMOS Logic Package Information

∙The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines

74HC/HCT4351

8-channel analog multiplexer/demultiplexer with latch

Product specification			December 1990
File under Integrated Circuits, IC06

Philips Semiconductors	Product specification

8-channel analog

74HC/HCT4351

multiplexer/demultiplexer with latch

FEATURES

·Wide analog input voltage range:

± 5 V

·Low “ON” resistance:

80 W (typ.) at VCC - VEE = 4.5 V 70 W (typ.) at VCC - VEE = 6.0 V 60 W (typ.) at VCC - VEE = 9.0 V

·Logic level translation: to enable 5 V logic to communicate with ± 5 V analog signals

·Typical “break before make” built in

·Address latches provided

·Output capability: non-standard

·ICC category: MSI

GENERAL DESCRIPTION

The 74HC/HCT4351 are high-speed Si-gate CMOS devices. They are specified in compliance with JEDEC standard no. 7A.

QUICK REFERENCE DATA

VEE = GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns

The 74HC/HCT4351 are 8-channel analog multiplexers/demultiplexers with three select inputs (S0 to

S2), two enable inputs (E1 and E2), a latch enable input

(LE), eight independent inputs/outputs (Y0 to Y7) and a common input/output (Z).

With E1 LOW and E2 is HIGH, one of the eight switches is selected (low impedance ON-state) by S0 to S2. The data at the select inputs may be latched by using the active LOW latch enable input (LE). When LE is HIGH the latch is transparent. When either of the two enable inputs,

E1 (active LOW) and E2 (active HIGH), is inactive, all 8 analog switches are turned off.

VCC and GND are the supply voltage pins for the digital

control inputs (S0 to S2, LE, E1 and E2). The VCC to GND ranges are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT.

The analog inputs/outputs (Y0 to Y7, and Z) can swing between VCC as a positive limit and VEE as a negative limit.

VCC - VEE may not exceed 10.0 V.

For operation as a digital multiplexer/demultiplexer, VEE is connected to GND (typically ground).

	SYMBOL	PARAMETER					CONDITIONS	TYPICAL		UNIT
								HC	HCT
	tPZH / tPZL	turn “ON” time			1, E2 or Sn to Vos		CL = 15 pF; RL = 1 kW; VCC = 5 V	27	35	ns
			E
	tPHZ / tPLZ	turn “OFF” time				1, E2 or Sn to Vos		21	23	ns
				E
	CI	input capacitance						3.5	3.5	pF
	CPD	power dissipation capacitance per switch					notes 1 and 2	25	25	pF
	CS	max. switch capacitance
		independent (Y)						5	5	pF
		common (Z)						25	25	pF

Notes

1.CPD is used to determine the dynamic power dissipation (PD in mW):

PD = CPD ´ VCC2 ´ fi +å {(CL+ CS) ´ VCC2 ´ fo} where:

fi = input frequency in MHz fo = output frequency in MHz

CL = output load capacitance in pF CS = max. switch capacitance in pF

å {(CL+ CS) ´ VCC2 ´ fo} = sum of outputs VCC = supply voltage in V

2. For HC the condition is VI = GND to VCC

For HCT the condition is VI = GND to VCC - 1.5 V

ORDERING INFORMATION

See “74HC/HCT/HCU/HCMOS Logic Package Information”.

December 1990

2

Philips Semiconductors	Product specification

8-channel analog multiplexer/demultiplexer

74HC/HCT4351

with latch

PIN DESCRIPTION

PIN NO.		SYMBOL			NAME AND FUNCTION
4		Z			common
3, 14		n.c.			not connected
7					enable input (active LOW)
		E	1
8		E2			enable input (active HIGH)
9		VEE			negative supply voltage
10		GND			ground (0 V)
11					latch enable input (active LOW)
		LE
15, 13, 12		S0 to S2			select inputs
17, 18, 19, 16, 1, 6, 2, 5		Y0 to Y7			independent inputs/outputs
20		VCC			positive supply voltage

Fig.1 Pin configuration.		Fig.2		Fig.3 IEC logic symbol.

December 1990

3

Philips Semiconductors	Product specification

8-channel analog multiplexer/demultiplexer

74HC/HCT4351

with latch

FUNCTION TABLE

				INPUTS						CHANNEL
E1			E2	LE			S2	S1	S0	ON
H			X	X			X	X	X	none
X			L	X			X	X	X	none
L			H	H			L	L	L	Y0
L			H	H			L	L	H	Y1
L			H	H			L	H	L	Y2
L			H	H			L	H	H	Y3
L			H	H			H	L	L	Y4
L			H	H			H	L	H	Y5
L			H	H			H	H	L	Y6
L			H	H			H	H	H	Y7
L			H	L			X	X	X	(1)
X			X	↓			X	X	X	(2)

Notes

1.Last selected channel “ON”.

2.Selected channels latched.

3.H = HIGH voltage level L = LOW voltage level

X = don’t care

↓ = HIGH-to-LOW LE transition

APPLICATIONS

∙Analog multiplexing and demultiplexing

∙Digital multiplexing and demultiplexing

∙Signal gating

Fig.4 Functional diagram.

Fig.5 Schematic diagram (one switch).

December 1990

4

Philips Semiconductors	Product specification

8-channel analog multiplexer/demultiplexer

74HC/HCT4351

with latch

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134)

Voltages are referenced to VEE = GND (ground = 0 V)

SYMBOL	PARAMETER	MIN.	MAX.	UNIT	CONDITIONS
VCC	DC supply voltage	−0.5	+11.0	V
±IIK	DC digital input diode current		20	mA	for VI < −0.5 V or VI > VCC + 0.5 V
±ISK	DC switch diode current		20	mA	for VS < −0.5 V or VS > VCC + 0.5 V
±IS	DC switch current		25	mA	for −0.5 V < VS < VCC + 0.5 V
±IEE	DC VEE current		20	mA
±ICC; ±IGND	DC VCC or GND current		50	mA
Tstg	storage temperature range	−65	+150	°C
Ptot	power dissipation per package				for temperature range: −40 to +125 °C
					74HC/HCT
	plastic DIL		750	mW	above +70 °C: derate linearly with 12 mW/K
	plastic mini-pack (SO)		500	mW	above +70 °C: derate linearly with 8 mW/K
PS	power dissipation per switch		100	mW

Note to ratings

1.To avoid drawing VCC current out of terminal Z, when switch current flows in terminals Yn, the voltage drop across the bidirectional switch must not exceed 0.4 V. If the switch current flows into terminal Z, no VCC current will flow out of terminals Yn. In this case there is no limit for the voltage drop across the switch, but the voltages at Yn and Z may not exceed VCC or VEE.

RECOMMENDED OPERATING CONDITIONS

SYMBOL

PARAMETER

74HC

74HCT

UNIT

CONDITIONS

min.

typ.

max.

min.

typ.

max.

VCC

DC supply voltage VCC−GND

2.0

5.0

10.0

4.5

5.0

5.5

V

see Figs 6 and 7

VCC

DC supply voltage VCC−VEE

2.0

5.0

10.0

2.0

5.0

10.0

V

see Figs 6 and 7

VI

DC input voltage range

GND

VCC

GND

VCC

V

VS

DC switch voltage range

VEE

VCC

VEE

VCC

V

Tamb

operating ambient temperature range

−40

+85

−40

+85

°C

see DC and AC

Tamb

operating ambient temperature range

−40

+125

−40

+125

°C

CHARACTERISTICS

tr, tf

input rise and fall times

1000

VCC = 2.0 V

6.0

500

6.0

500

ns

VCC = 4.5 V

400

VCC = 6.0 V

250

VCC = 10.0 V

December 1990

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Philips Semiconductors	Product specification

8-channel analog multiplexer/demultiplexer

74HC/HCT4351

with latch

10					MBA334
handbook, halfpage
VCC - GND
(V)
8
6			operating area
4
2
0	2	4	6	8	10
0

VCC - VEE (V)

Fig.6 Guaranteed operating area as a function of the supply voltages for 74HC4351.

Fig.7 Guaranteed operating area as a function of the supply voltages for 74HCT4351.

DC CHARACTERISTICS FOR 74HC/HCT
For 74HC:	VCC − GND or VCC − VEE = 2.0, 4.5, 6.0 and 9.0 V
For 74HCT: VCC − GND = 4.5 and 5.5 V; VCC − VEE = 2.0, 4.5, 6.0 and 9.0 V
					Tamb (°C)							TEST CONDITIONS
					74HC/HCT
SYMBOL	PARAMETER									UNIT	VCC	VEE	IS
		+25				−40 to +85		−40 to						Vis	VI
								+125			(V)	(V)	(μA)
		min.	typ.	max.		min.	max.	min.	max.
RON	ON resistance		−	−			−		−	Ω	2.0	0	100	VCC	VIN
	(rail)		100	180			225		270	Ω	4.5	0	1000	to	or
			90	160			200		240	Ω	6.0	0	1000	VEE	VIL
			70	130			165		195	Ω	4.5	−4.5	1000
RON	ON resistance		150	−			−		−	Ω	2.0	0	100	VEE	VIH
	(rail)		80	140			175		210	Ω	4.5	0	1000		or
			70	120			150		180	Ω	6.0	0	1000		VIL
			60	105			130		160	Ω	4.5	−4.5	1000
RON	ON resistance		150	−			−		−	Ω	2.0	0	100	VCC	VIH
	(rail)		90	160			200		240	Ω	4.5	0	1000		or
			80	140			175		210	Ω	6.0	0	1000		VIL
			65	120			150		180	Ω	4.5	−4.5	1000
RON	maximum ON		−							Ω	2.0	0		VCC	VIH
	resistance		9							Ω	4.5	0		to	or
	between any two		8							Ω	6.0	0		VEE	VIL
	channels		6							Ω	4.5	−4.5

Notes to DC characteristics

1.At supply voltages (VCC − VEE) approaching 2.0 V, the analog switch ON-resistance becomes extremely non-linear. There it is recommended that these devices be used to transmit digital signals only, when using these supply voltages.

2.For test circuit measuring RON see Fig.8.

December 1990

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