Table 8. Driver: operating conditions (VCC = +3.0 V to 5.5 V, TA = Tmin to Tmax, unless otherwise specified. Typical

values are at VCC = 5 V and T = 25 °C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

DC driver/DC

|VOD|

Driver differential output voltage

magnitude

RL = 60 Ω/375 Ω (Figure 2),

VCC ≥ 4.5 V

-7 V ≤ VCM ≤ +12 V

2.1

V

RL = 60 Ω/375 Ω (Figure 2)

-7 V ≤ VCM ≤ +12 V

1.5

3.5

RL = 54 Ω (Figure 3)

1.5

Δ|VOD|

Change in magnitude of driver

differential output voltage

RL = 54 Ω, CL = 50 pF

-50

+50

mV

VOC(SS)

Steady-state common-mode output

voltage

Center of two 27 Ω load

resistors

1

2.7

3 (1)

V

ΔVOC

Change in differential driver output

common-mode voltage

-0.12

-0.02

0.12

V

VOC(PP)

Peak-to-peak driver common-mode

output voltage

0.9

VOH

Single-ended driver output High

A or B output, IA or IB = -20

mA

VCC-0.4

V

VOL

Single-ended driver output Low

A or B output, IA or IB = 20

mA

0.95

V

Driver/switching characteristics

tr, tf

Driver differential output rise/fall

time

RL = 54 Ω, CL = 50 pF

0.5

5

7.5

ns

tPHL, tPLH

Driver propagation delay

4

8

20

tSK(P)

Driver pulse skew, |tPHL–tPLH|

3

tPLZ, tPHZ

Driver disable time

11

20

tPZL, tPZH

Driver enable time

Receiver enabled

7

20

Receiver disabled

7

20

1. For VCC = 5.5 V and T < 0 °C, VOC(SS) max = 3.15 V.

Table 9. Input logic interface (D, DE, RE): (VCC = +3.0 V to 5.5 V, TA = Tmin to Tmax, unless otherwise specified. Typical

values are at VCC = 5 V and T = 25 °C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VIH

High-level input voltage

2

VCC

V

VIL

Low-level input voltage

0

0.8

V

IIn

Input current

3 V ≤ VCC ≤ 5.5 V, Vin = 0 or

VCC

-5

5

µA

Input impedance on first transition

(DE, RE)

6

kΩ

ST4E1216, ST4E1240

Electrical characteristics

DS14542 - Rev 2

page 6/31