tsu

Setup time, before enable C

↓

ns

V

VOH

SDAS151A − D2910 — JUNE 1988 — REVISED JANUARY 1990

SN74ALS29843, SN74ALS29844

9BIT BUS INTERFACE DTYPE LATCHES WITH 3STATE OUTPUTS

POST OFFICE BOX 655303

6

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage applied to a disabled 3-state output

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range

− 65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only, and

functional operation of the device at these or any other conditions beyond those indicated in the “Recommended Operating Conditions” section of

this specification is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 2: All Voltage Values in this data sheet are with respect to GND.

recommended operating conditions

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

5

4.75

5

5.25

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

− 24

mA

IOL

Low-level output current

48

mA

PRE low

5

8

tw

Pulse duration

CLR low

6

8

ns

C high

4

6

Data

2.5

2.5

PRE or CLR inactive state

14

12

th

Hold time, data after enable C

↓

4.5

4.5

ns

TA

Operating free-air temperature

25

0

70

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS‡

MIN

TYP§

MAX

UNIT

VIK

VCC = MIN,

II = −18 mA

−1.2

V

VCC = MIN,

IOH = −15 mA

2.4

3.3

VCC = MIN,

IOH = − 24 mA

2

3.1

VOL

VCC = MIN,

IOL = 48 mA

0.35

0.5

V

IOZH

VCC = MAX,

VO = 2.7 V

20

µA

IOZL

VCC = MAX,

VO = 0.4 V

− 20

µA

II

VCC = MAX,

VI = 5.5 V

0.1

mA

IIH

VCC = MAX,

VI = 2.7 V

20

µA

IIL

VCC = MAX,

VI = 0.4 V

− 0.2

mA

IO¶

VCC = MAX,

VO = 0

−75

− 250

mA

ICC

VCC = MAX,

Outputs low

55

85

mA

‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

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

¶ Not more than one output should be shorted at a time and the duration of the short circuit should not exceed one second.