SN54ALS299, SN74ALS299

8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS

WITH 3-STATE OUTPUTS

SDAS220B – DECEMBER 1982 – REVISED DECEMBER 1994

4

POST OFFICE BOX 655303

recommended operating conditions

SN54ALS299

SN74ALS299

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

0.7

0.8

V

IOH

High level output current

QA

′ or QH′

– 0.4

– 0.4

mA

IOH

High-level output current

QA – QH

–1

– 2.6

mA

IOL

Low level output current

QA

′ or QH′

4

8

mA

IOL

Low-level output current

QA – QH

12

24

mA

TA

Operating free-air temperature

–55

125

0

70

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54ALS299

SN74ALS299

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.5

– 1.5

V

All outputs

VCC = 4.5 V to 5.5 V,

IOH = – 0.4 mA

VCC –2

VCC –2

VOH

QA QH

VCC =4 5V

IOH = – 1 mA

2.4

3.3

V

QA – QH

VCC = 4.5 V

IOH = – 2.6 mA

2.4

3.2

QA

′ or QH′

VCC =4 5V

IOL = 4 mA

0.25

0.4

0.25

0.4

VOL

QA

′ or QH′

VCC = 4.5 V

IOL = 8 mA

0.35

0.5

V

VOL

QA QH

VCC =4 5V

IOL = 12 mA

0.25

0.4

0.25

0.4

V

QA – QH

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

II

A – H

VCC =5 5V

VI = 5.5 V

0.1

0.1

mA

II

Any others

VCC = 5.5 V

VI = 7 V

0.1

0.1

mA

IIH‡

VCC = 5.5 V,

VI = 2.7 V

20

20

µA

I ‡

S0, S1, SR, SL

VCC =5 5V

VI =0 4V

– 0.2

– 0.2

mA

IIL‡

Any others

VCC = 5.5 V,

VI = 0.4 V

– 0.1

– 0.1

mA

I §

QA

′ or QH′

VCC =5 5V

VO = 2 25 V

–15

–70

–15

–70

mA

IO§

QA – QH

VCC = 5.5 V,

VO = 2.25 V

–20

–112

–30

–112

mA

Outputs high

15

28

15

28

ICC

VCC = 5.5 V

Outputs low

22

38

22

38

mA

Outputs disabled

23

40

23

40

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

‡ For I/O ports (QA–QH), the parameters IIH and IIL include the off-state output current.

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