74VHC157MTR - STMicroelectronics - Datasheet.Directory

1/9June 2001

■HIGH SPEED: tPD = 4.1 ns (TYP.) at VCC =5V

■LOW POWER DISSIPATION:

ICC =4µA (MAX.) at TA=25°C

■HIGH NOISE IMMUNITY:

VNIH =VNIL = 28% VCC (MIN.)

■POWER DOWN PROTECTION ON INPUTS

■SYMMETRICAL OUTPUT IMPEDANCE:

|IOH|=I

OL = 8 mA (MIN)

■BALANCED PROPAGATION DELAYS:

tPLH ≅tPHL

■OPERATING VOLTAGE RANGE:

VCC(OPR) = 2V to 5.5V

■PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 157

■IMPROVED LATCH-UP IMMUNITY

■LOW NOISE: VOLP = 0.8V (MAX.)

DESCRIPTION

The 74VHC157 is an advanced high-speed

CMOS QUAD 2-CHANNEL MULTIPLEXER

fabricated with sub-micron silicon gate and

double-layer metal wiring C2MOS technology.

It consists of four 2-input digital multiplexer with

common select and strobe inputs. It is a

non-inverting multiplexer. When the STROBE

input is held high selection of data is inhibited and

all the outputs become low. The SELECT

decoding determines whether the A or B inputs

get routed to their corresponding Y outputs.

Power down protection is provided on all inputs

and 0 to 7V can be accepted on inputs with no

regard to the supply voltage. This device can be

used to interface 5V to 3V. All inputs and outputs

are equipped with protection circuits against static

discharge, giving them 2KV ESD immunity and

transient excess voltage.

74VHC157

QUAD 2 CHANNEL MULTIPLEXER

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE TUBE T & R

SOP 74VHC157M 74VHC157MTR

TSSOP 74VHC157TTR

TSSOPSOP

74VHC157

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INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

TRUTH TABLE

X : Don’t care

LOGIC DIAGRAM

PIN No SYMBOL NAME AND FUNCTION

1 SELECT Common Data Select

Inputs

2, 5, 11, 14 1A to 4A Data Inputs From Source

3, 6, 10, 13 1B to 4B Data Inputs From Source

4, 7, 9, 12 1Y to 4Y Multiplexer Outputs

15 STROBE Strobe Input

8 GND Ground (0V)

16 VCC Positive Supply Voltage

INPUTS OUTPUT

STROBE SELECT A B Y

HXXXL

LLLXL

LLHXH

LHXLL

LHXHH

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ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are thosevalues beyond which damage to thedevice may occur. Functional operation under these conditions is

not implied

RECOMMENDED OPERATING CONDITIONS

1) VIN from 30% to 70% of VCC

Symbol Parameter Value Unit

VCC Supply Voltage -0.5 to +7.0 V

VIDC Input Voltage -0.5 to +7.0 V

VODC Output Voltage -0.5 to VCC + 0.5 V

IIK DC Input Diode Current -20 mA

OK DC Output Diode Current ±20 mA

IODC Output Current ±25 mA

ICC or IGND DC VCC or Ground Current ±50 mA

Tstg Storage Temperature -65 to +150 °C

TLLead Temperature (10 sec) 300 °C

Symbol Parameter Value Unit

VCC Supply Voltage 2 to 5.5 V

VIInput Voltage 0 to 5.5 V

VOOutput Voltage 0 to VCC V

Top Operating Temperature -55 to 125 °C

dt/dv Input Rise and Fall Time (note 1) (VCC = 3.3 ±0.3V)

(VCC = 5.0 ±0.5V) 0 to 100

0to20 ns/V

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DC SPECIFICATIONS

AC ELECTRICAL CHARACTERISTICS (Input tr=t

f= 3ns)

(*) Voltage range is 3.3V ±0.3V

(**) Voltage range is 5.0V ±0.5V

Symbol Parameter

Test Condition Value

Unit

VCC

(V)

TA=25°C-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

VIH High Level Input

Voltage 2.0 1.5 1.5 1.5 V

3.0 to

5.5 0.7VCC 0.7VCC 0.7VCC

VIL Low Level Input

Voltage 2.0 0.5 0.5 0.5 V

3.0 to

5.5 0.3VCC 0.3VCC 0.3VCC

VOH High Level Output

Voltage 2.0 IO=-50 µA1.9 2.0 1.9 1.9

3.0 IO=-50 µA2.9 3.0 2.9 2.9

4.5 IO=-50 µA4.4 4.5 4.4 4.4

3.0 IO=-4 mA 2.58 2.48 2.4

4.5 IO=-8 mA 3.94 3.8 3.7

VOL Low Level Output

Voltage 2.0 IO=50 µA0.0 0.1 0.1 0.1

3.0 IO=50 µA0.0 0.1 0.1 0.1

4.5 IO=50 µA0.0 0.1 0.1 0.1

3.0 IO=4 mA 0.36 0.44 0.55

4.5 IO=8 mA 0.36 0.44 0.55

IIInput Leakage

Current 0to

5.5 VI= 5.5V or GND ±0.1 ±1±1µA

ICC Quiescent Supply

Current 5.5 VI=V

CC or GND 44040µA

Symbol Parameter

Test Condition Value

Unit

VCC

(V) CL

(pF)

TA=25°C-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

tPLH

tPHL

Propagation Delay

Time

A, B to Y

3.3(*) 15 6.2 9.7 1.0 11.5 1.0 11.5

3.3(*) 50 8.7 13.2 1.0 15.0 1.0 15.0

5.0(**) 15 4.1 6.4 1.0 7.5 1.0 7.5

5.0(**) 50 5.6 8.4 1.0 9.5 1.0 9.5

tPLH

tPHL

Propagation Delay

Time

SELECT to Y

3.3(*) 15 8.4 13.2 1.0 15.5 1.0 15.5

3.3(*) 50 10.9 16.7 1.0 19.0 1.0 19.0

5.0(**) 15 5.3 8.1 1.0 9.5 1.0 9.5

5.0(**) 50 6.8 10.1 1.0 11.5 1.0 11.5

tPLH

tPHL

Propagation Delay

Time STROBE to Y 3.3(*) 15 8.7 13.6 1.0 16.0 1.0 16.0

3.3(*) 50 11.2 17.1 1.0 19.5 1.0 19.5

5.0(**) 15 5.6 8.6 1.0 10.0 1.0 10.0

5.0(**) 50 7.1 10.6 1.0 12.0 1.0 12.0

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CAPACITIVE CHARACTERISTICS

1) CPD is defined as thevalue of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) =C

PD xV

CC xf

IN +I

CC/4 (per

channel)

DYNAMIC SWITCHING CHARACTERISTICS

1) Worst case package.

2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND.

3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (VILD), 0V to threshold

(VIHD), f=1MHz.

TEST CIRCUIT

CL=15/50pF or equivalent (includes jig and probe capacitance)

RT=Z

OUT of pulse generator (typically 50Ω)

Symbol Parameter

Test Condition Value

Unit

TA=25°C-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

CIN Input Capacitance 6101010pF

PD Power Dissipation

Capacitance

(note 1) 18 pF

Symbol Parameter

Test Condition Value

Unit

VCC

(V)

TA=25°C-40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

VOLP Dynamic Low

Voltage Quiet

Output (note 1, 2) 5.0

CL=50pF

0.3 0.8 V

VOLV -0.8 -0.3

VIHD Dynamic High

Voltage Input

(note 1, 3) 5.0 3.5 V

VILD Dynamic Low

Voltage Input

(note 1, 3) 5.0 1.5 V

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WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING CONDITIONS

WAVEFORM 2: PROPAGATION DELAYS FOR NON-INVERTING CONDITIONS

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DIM. mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 1.75 0.068

a1 0.1 0.2 0.003 0.007

a2 1.65 0.064

b 0.35 0.46 0.013 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.019

c1 45°(typ.)

D 9.8 10 0.385 0.393

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.62 0.024

S8°(max.)

SO-16 MECHANICAL DATA

PO13H

74VHC157

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DIM. mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0089

D 4.9 5 5.1 0.193 0.197 0.201

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0°8°0°8°

L 0.45 0.60 0.75 0.018 0.024 0.030

TSSOP16 MECHANICAL DATA

PIN 1 IDENTIFICATION

A1 L

0080338D

74VHC157

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