74AHC257 Просмотр технического описания (PDF) - Philips Electronics

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74AHC257

Quad 2-input multiplexer; 3-state

Philips Electronics 

Philips Semiconductors

Quad 2-input multiplexer; 3-state

Product specification

74AHC257;

74AHCT257

RECOMMENDED OPERATING CONDITIONS

SYMBOL

PARAMETER

VCC

VI

VO

Tamb

DC supply voltage

input voltage

output voltage

operating ambient temperature

tr, tf

(∆t/∆V)

input rise and fall time ratios

CONDITIONS

see DC and AC

characteristics per

device

VCC = 3.3 ±0.3 V

VCC = 5 ±0.5 V

74AHC

74AHCT

UNIT

MIN. TYP. MAX. MIN. TYP. MAX.

2.0 5.0 5.5 4.5 5.0 5.5 V

0

−

5.5 0

−

5.5 V

0

−

VCC 0

−

VCC V

−40 +25 +85 −40 +25 +85 °C

−40 +25 +125 −40 +25 +125 °C

−

−

100 −

−

−

ns/V

−

−

20 −

−

20 ns/V

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134); voltages are referenced to GND (ground = 0 V).

SYMBOL

PARAMETER

VCC

DC supply voltage

VI

input voltage

IIK

DC input diode current

IOK

DC output clamping diode

current

IO

ICC; IGND

Tstg

PD

DC output sink current

DC VCC or GND current

storage temperature

power dissipation per package

CONDITIONS

VI < −0.5 V; note 1

VO < −0.5 V or VO > VCC + 0.5 V; note 1

−0.5 V < VO < VCC + 0.5 V

for temperature range: −40 to +125 °C; note 2

MIN. MAX. UNIT

−0.5 +7.0 V

−0.5 +7.0 V

−

−20 mA

−

±20 mA

−

±25 mA

−

±75 mA

−65 +150 °C

−

500 mW

Notes

1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. For SO packages: above 70 °C the value of PD derates linearly with 8 mW/K.

For TSSOP packages: above 60 °C the value of PD derates linearly with 5.5 mW/K.

2000 Apr 03

6

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