TXA/B

TXA/B

TXINHA/B

TRANSMITTER

RECEIVER

1:2.5

Point “A “

D

55

W

55

W

35

W

2.5:1

55

W

55

W

35

W

RXENA/B

BUSA/B

BUSA/B

RXA/B

RXA/B

Figure 2. Direct Coupled Test Circuits

Isolation

Transformer

Isolation

Transformer

Point “A “

D

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Receiver Enable Delay

tREN

From RXENA/B rising or falling edge to

40

ns

RXA/B or

Driver Delay

tDT

TXA/B, TXA/B to BUSA/B, BUSA/B

150

ns

Rise time

tr

35 ohm load

100

300

ns

Fall Time

tf

35 ohm load

100

300

ns

Inhibit Delay

tDI-H

Inhibited output

100

ns

tDI-L

Active output

150

ns

RECEIVER

TRANSMITTER

(Measured at Point “A ” in Figure 2)

(Measured at Point “A ” in Figure 2)

D

D

Receiver Delay

tDR

From input zero crossing to RXA/B or

450

ns

Receiver gap time

tRG

Spacing between RXA/B and RXA/B pulses

90

365

ns

RXA/B

RXA/B

VDD = 3.3 V, GND = 0V, T =Operating Temperature Range (unless otherwise specified).

A

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

Output Voltage

Direct coupled

35 ohm load

6.1

9.0

Vp-p

(Measured at Point “A “ in Figure 2)

70

20.0

27.0

Vp-p

Output Noise

V

Differential, inhibited

10.0

mVp-p

Output Dynamic Offset Voltage

V

-90

90

mV

-250

250

mV

Output resistance

R

Differential, not transmitting

10

Kohm

Output Capacitance

C

1 MHz sine wave

15

pF

TRANSMITTER

(Measured at Point “A ” in Figure 2 unless otherwise specified)

D

D

V

Transformer coupled

V

ohm load

(Measured at Point “A “ in Figure 3)

Direct coupled

35 ohm load

(Measured at Point “A “ in Figure 2)

Transformer coupled

V

70 ohm load

(Measured at Point “A “ in Figure 3)

OUT

OUT

DYN

T

D

T

ON

DYN

OUT

OUT

VDD = 3.3 V, GND = 0V, T = Operating Temperature Range (unless otherwise specified).

A

DC ELECTRICAL CHARACTERISTICS (cont.)

HI-1579, HI-1581

HOLT INTEGRATED CIRCUITS

5