74LV251 datasheet(2/12 Pages) PHILIPS

2 / 12 page

Philips Semiconductors

Product specification

74LV251

8-input multiplexer (3-State)

1998 May 20

853–1967 19420

FEATURES

• Optimized for low voltage applications: 1.0 to 3.6 V

• Accepts TTL input levels between V

CC = 2.7 V and VCC = 3.6 V

• Typical V

OLP (output ground bounce) < 0.8 V at VCC = 3.3 V,

Tamb = 25°C

• Typical V

OHV (output VOH undershoot) > 2 V at VCC = 3.3 V,

Tamb = 25°C

• True and complement outputs

• Both outputs are 3-State for further multiplexer expansion

• Multifunction capability

• Permits multiplexing from n-lines to one line

• Output capability: standard

• I

CC category: MSI

DESCRIPTION

The 74LV251 is a low-voltage Si-gate CMOS device and is pin and

function compatible with 74HC/HCT251.

The 74LV251 is an 8-input multiplexer with 8 binary inputs (I0 to I7), an

output enable input (OE) and three select inputs (S0, S1, S2). One of

the eight binary inputs is selected by the select inputs and is routed to

the outputs (Y, Y). Both outputs are in the high impedance OFF-state

(Z) when the output enable input is HIGH, allowing multiplexer

expansion by tying the outputs.

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5 ns

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

tPHL/tPLH

Propagation delay

In to Y

Sn to Y

CL = 15 pF;

VCC = 3.3 V

Input capacitance

3.5

CPD

Power dissipation capacitance per gate

VCC = 3.3 V

VI = GND to VCC1

NOTE:

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

PD = CPD × VCC2 × fi ) (CL × VCC2 × fo) where:

fi = input frequency in MHz; CL = output load capacitance in pF;

fo = output frequency in MHz; VCC = supply voltage in V;

(CL × VCC2 × fo) = sum of the outputs.

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

PKG. DWG. #

16-Pin Plastic DIL

–40

°C to +125°C

74LV251 N

SOT38-4

16-Pin Plastic SO

–40

°C to +125°C

74LV251 D

SOT109-1

16-Pin Plastic SSOP Type II

–40

°C to +125°C

74LV251 DB

SOT338-1

16-Pin Plastic TSSOP Type I

–40

°C to +125°C

74LV251 PW

74LV251PW DH

SOT403-1

74LV251 Datasheet(PDF) 2 Page - NXP Semiconductors

74LV251 Datasheet(HTML) 2 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

Datasheet Download

Link URL