SN74LVC646

OCTAL BUS TRANSCEIVER AND REGISTER

WITH 3-STATE OUTPUTS

SCAS302A – JANUARY 1993 – REVISED JULY 1995

6

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC†

MIN

TYP‡

MAX

UNIT

IOH = – 100 µA

MIN to MAX

VCC – 0.2

VOH

IOH =12 mA

2.7 V

2.2

V

VOH

IOH = – 12 mA

3 V

2.4

V

IOH = – 24 mA

3 V

2

IOL = 100 µA

MIN to MAX

0.2

VOL

IOL = 12 mA

2.7 V

0.4

V

IOL = 24 mA

3 V

0.55

II

VI = 5.5 V or GND

3.6 V

±5

µA

IOZ§

VO = VCC or GND

3.6 V

±10

µA

ICC

VI = VCC or GND,

IO = 0

3.6 V

20

µA

nICC

One input at VCC – 0.6 V,

Other inputs at VCC or GND

3 V to 3.6 V

500

µA

Ci

Control

inputs

VI = VCC or GND

3.3 V

4.6

pF

Cio

A or B

ports

VO = VCC or GND

3.3 V

7.2

pF

† For conditions shown as MIN or MAX, use the appropriate values under recommended operating conditions.

‡ All typical values are measured at VCC = 3.3 V, TA = 25°C.

§ For I/O ports, the parameter IOZ includes the input leakage current.

timing characteristics over recommended operating free-air temperature range (unless otherwise

noted) (see Figure 2)

VCC = 3.3 V

± 0.3 V

VCC = 2.7 V

UNIT

MIN

MAX

MIN

MAX

tw

Pulse duration

5

5

ns

tsu

Setup time, data before CLK

↑

5

5

ns

th

Hold time, data after CLK

↑

1

1

ns

(unless otherwise noted) (see Figure 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 3.3 V

± 0.3 V

VCC = 2.7 V

UNIT

(INPUT)

(OUTPUT)

MIN

MAX

MIN

MAX

fmax

100

80

MHz

A or B

B or A

1.5

8

9.2

tpd

CLK

A or B

1.5

9

11

ns

SBA or SAB

A or B

1.5

9

11

ten

OE

A or B

1.5

8.5

9.5

ns

tdis

OE

A or B

1.5

8.5

9.5

ns

ten

DIR

A or B

1.5

9

10

ns

tdis

DIR

A or B

1.5

9

10

ns