DocID7510 Rev 2

11/18

L5951

Electrical specifications

18

I4Xvih

I4Xvil

4X input current

4X = 5 VDC

4X = 0 VDC

0

0

A

A

LTrip1

LTrip2

LOOP input trip point voltages

Normal Mode

Loopback Mode

2

0.8

V

V

ILvih

ILvil

LOOP input current

LOOP = 5VDC

LOOP = 0VDC

0

A

VRXhigh

RX output voltage, high

BUS = 7V, IRX = -200A4.85

V

VRXlow

RX output voltage, low

BUS = 0V, IRX = 1.6mA

0.2

V

IRX

RX output current

RX = high (Short circuit

protection limits)

5mA

VIH

VIL

Sleep(1) input voltage

TX = 5VDC

Verify BUS > 3.725

Verify BUS < 4.025

2

0.8

V

V

ISleepvih

ISleepvil

Sleep(1) input current

Sleep* = 5VDC

Sleep* = 0VDC

0.2

0

A

A

AC characteristics for class 2 transceiver (Standard loads: IREG1 = 0.5mA, IREG2 = 0.5mA, IREG3 = 5mA)

BUSLTOH BUS voltage rise times

TX = 7.812Hz square wave

See Figure 1

Min and max loaded BUS

15

s

BUSHTOL BUS voltage fall times

TX = 7.812Hz square wave

See Figure 1

Min and max loaded BUS

14

s

tWbus

BUS pulse width distortion

TX = 7.812Hz square wave

See Figure 2

Load BUS with 3.300pF and

1.38k



Measure @ 1.5V levels

Measure @ 6.25V levels

77

48

s

s

V1

V2

Spectral content limit

(Measure spectral peak from

0.53MHz to 1.6MHz)

VBAT = 9V to 16V, no ground

offset, 0.53

 f  1MHz.

VBAT = 9V to 16V, no ground

offset, 1

 f  1.67MHz.

100

80

V

V

BUSDLY Propagation delay

Measure delay between TX trip

point and RX trip point

16

s

TX4XDLY

TXNormDL

Y

TX to BUS delay

Measure from 2.5V on TX to

3.875V on BUS

4X mode

Normal mode

3.5

14.5

s

s

Table 6. Electrical characteristics (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Obsolete

Product(s)

- Obsolete

Product(s)