SN54AS194, SN74AS194

4BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTERS

SDAS212A − DECEMBER 1983 − REVISED DECEMBER 1994

5

POST OFFICE BOX 655303

POST OFFICE BOX 1443

recommended operating conditions

SN54AS194

SN74AS194

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IOH

High-level output current

−2

−2

mA

IOL

Low-level output current

20

20

mA

fclock*

Clock frequency

0

75

0

80

MHz

CLR

4

4.5

tw*

Pulse duration

CLK high

4

4

ns

tw*

Pulse duration

CLK low

6

7

ns

Select

9

9.5

tsu*

Setup time before CLK

↑

Data

3.5

4

ns

tsu*

Setup time before CLK

↑

Clear inactive state

6

6

ns

th*

Hold time, data after CLK

↑

0.5

0.5

ns

TA

Operating free-air temperature

−55

125

0

70

°C

* On products compliant to MIL-STD-883, Class B, these parameters are based on characterization data, but are not production tested.

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54AS194

SN74AS194

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = − 18 mA

− 1.2

− 1.2

V

VOH

VCC = 4.5 V to 5.5 V,

IOH = − 2 mA

VCC −2

VCC −2

V

VOL

VCC = 4.5 V,

IOL = 20 mA

0.35

0.5

0.35

0.5

V

II

Data, CLK, CLR

VCC = 5.5 V,

VI = 7 V

0.1

0.1

mA

II

Mode, SL, SR

VCC = 5.5 V,

VI = 7 V

0.2

0.2

mA

IIH

Data, CLK, CLR

VCC = 5.5 V,

VI = 2.7 V

20

20

A

IIH

Mode, SL, SR

VCC = 5.5 V,

VI = 2.7 V

40

40

µA

IIL

Data, CLK, CLR

VCC = 5.5 V,

VI = 0.4 V

− 0.5

− 0.5

mA

IIL

Mode, SL, SR

VCC = 5.5 V,

VI = 0.4 V

−1

−1

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

−30

−112

−30

−112

mA

ICC

VCC = 5.5 V

Outputs high

30

49

30

43

mA

ICC

VCC = 5.5 V

Outputs low

38

60

38

53

mA

† All typical values are at VCC = 5 V, TA = 25°C.

‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.