SN74BCT29834

8BIT TO 9BIT PARITY BUS TRANSCEIVER

SCBS256 − SEPTEMBER 1987 − REVISED NOVEMBER 1993

2−4

POST OFFICE BOX 655303

POST OFFICE BOX 1443

recommended operating conditions

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VOH

High-level output voltage, ERR

2.4

V

IOH

High-level output current

−24

mA

IOL

Low-level output current

48

mA

TA

Operating free-air temperature

0

70

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = −18 mA

−1.2

V

VOH

All inputs /outputs except ERR

VCC = 4.5 V

IOH = − 15 mA

2.4

V

VOH

All inputs /outputs except ERR

VCC = 4.5 V

IOH = − 24 mA

2

V

IOH

ERR

VCC = 4.5 V,

VOH = 2.4 V

20

µA

VOL

VCC = 4.5 V,

IOL = 48 mA

0.35

0.5

V

II

VCC = 5.5 V,

VI = 5.5 V

0.1

mA

IIH‡

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIL‡

Data

VCC = 5.5 V,

VI = 0.4 V

− 0.2

mA

IIL‡

Control

VCC = 5.5 V,

VI = 0.4 V

− 0.75

mA

IOS§

VCC = 5.5 V,

VO = 0

−75

− 250

mA

ICCL

VCC = 5.5 V,

Outputs open

55

80

mA

ICCZ

VCC = 5.5 V,

Outputs open

30

45

mA

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

‡ These parameters include off-state output current for I/O ports only.

§ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.

timing requirements over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted)

MIN

MAX

UNIT

CLK high

10

tw

Pulse duration

CLK low

10

ns

tw

Pulse duration

CLR low

10

ns

tsu

Setup time before CLK

↑

Bi and PARITY

12

ns

tsu

Setup time before CLK

↑

CLR inactive

12

ns

th

Hold time after CLK

↑

Bi and PARITY

0

ns