SN74BCT2420

NuBus

™ ADDRESS/DATA TRANSCEIVERS AND REGISTERS

SDIS007A – D3159, NOVEMBER 1988 – REVISED JANUARY 1989

POST OFFICE BOX 655303

7

electrical characteristics over recommended operating free-air temperature range

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

V

VCC = 4.5 V to 5.5 V, IOH = – 400 µA

VCC – 1.5

Ax, Dx, ADx

VCC = 4.5 V,

IOH = – 3 mA

2.8

3.6

VOH

VCC = 4.5 V,

IOH = – 15 mA

2

V

SSEQ IDEQ

VCC = 4.5 V to 5.5 V, IOH = – 400 µA

VCC –2

SSEQ, IDEQ

VCC = 4.5 V,

IOH = – 2.6 mA

2.4

3.2

Ax Dx ADx

VCC = 4.5 V,

IOL = 12 mA

0.25

0.4

VOL

Ax, Dx, ADx

VCC = 4.5 V,

IOL = 24 mA

0.35

0.5

V

VOL

SSEQ IDEQ

VCC = 4.5 V,

IOL = 8 mA

0.25

0.4

V

SSEQ, IDEQ

VCC = 4.5 V,

IOL = 16 mA

0.35

0.5

II

VCC = 5.5 V,

VI = 5.5 V

100

µA

‡

AEN, DEN, ADEN

20

IIH‡

ID3–ID0

VCC = 5.5 V,

VI = 2.7 V

– 400

µA

All other inputs

– 100

IIL‡

ID3–ID0

VCC =5 5V

VI =0 4V

– 750

µA

IIL‡

All other inputs

VCC = 5.5 V,

VI = 0.4 V

– 200

µA

IOS§

VCC = 5.5 V,

VO = 0 V

–60

– 225

mA

ICC

Enabled

VCC = 5.5 V,

VIL = 0.5 V,

110

160

mA

ICC

Disabled

CC

,

IL

,

VIH = 3 V,

Outputs open

30

40

mA

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

‡ For I/O ports, the parameters IIH and IIL include the off-state output current.

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