4.4 Thermal Information

THERMAL METRIC(1)

CD74AC238

UNIT

BQB

(WQFN)

D (SOIC)

PW (TSSOP)

16 PINS

16 PINS

16 PINS

RθJA

Junction-to-ambient thermal resistance

83.9

106.6

126.2

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

4.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25 °C

-55°C to 125°C

-40°C to 85°C

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

VOH

VI = VlH or VlL

IOH = -50 μΑ

1.5 V

1.4

1.4

1.4

V

3 V

2.9

2.9

2.9

4.5 V

4.4

4.4

4.4

IOH = -4 mA

3 V

2.58

2.4

2.48

IOH = -24 mA

4.5 V

3.94

3.7

3.8

IOH = -50 mA(1)

5.5 V

3.85

IOH = -75 mA(1)

5.5 V

3.85

VOL

VI = VlH or VIL

IOL = 50 μA

1.5 V

0.1

0.1

0.1

V

3 V

0.1

0.1

0.1

4.5 V

0.1

0.1

0.1

IOL = 12 mA

3 V

0.36

0.5

0.44

IOL = 24 mA

4.5 V

0.36

0.5

0.44

IOL = 50 mA(1)

5.5 V

1.65

IOL = 75 mA(1)

5.5 V

1.65

II

VI = VCC or GND

5.5 V

±0.1

±1

±1

μA

ICC

VI = VCC or GND,

IO = 0

5.5 V

8

160

80

μA

Ci

10

10

10

pF

(1)

Test one output at a time, not exceeding 1-second duration. Measurement is made by forcing indicated current and measuring voltage

to minimize power dissipation. Test verifies a minimum 50-Ω transmission-line drive capability at 85°C and 75-Ω transmission-line drive

capability at 125°C.

4.6 Switching Characteristics, VCC = 1.5 V

over recommended operating free-air temperature range, VCC = 1.5 V, CL = 50 pF (unless otherwise noted) (see Load Circuit

and Voltage Waveforms)

PARAMETER

FROM (INPUT)

TO (OUTPUT)

-55°C to 125°C

-40°C to 85°C

UNIT

MIN

MAX

MIN

MAX

tPLH

A, B, C

Any Y

187

170

ns

tPHL

187

170

tPLH

G1

Any Y

208

189

ns

tPHL

208

189

tPLH

G2A, G2B

Any Y

149

135

ns

tPHL

149

135

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CD74AC238

SCHS331B – FEBRUARY 2003 – REVISED JULY 2024

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