+3.3V Multiprotocol Software-Selectable

Cable Terminators and Transceivers

4

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ELECTRICAL CHARACTERISTICS (continued)

and V- input voltage conditions.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

V.28 TRANSMITTER

Ω, Figure 3

±5.0

±5.4

Output Voltage Swing

Open circuit, Figure 3

±6.5

V

Short-Circuit Current

T4OUT = GND

±25

±60

mA

+3V to -3V or -3V to +3V, Figure 3

430

Output Slew Rate

SR

+3V to -3V or -3V to +3V, Figure 3

630

V/µs

Transmitter Propagation Delay

1µs

Data Skew

100

ns

V.28 RECEIVER

Input Threshold Low

1.1

0.8

V

Input Threshold High

2.0

1.6

V

Input Hysteresis

0.5

V

MAX3172

5

10

15

µs

Receiver Propagation Delay

Figure 4

MAX3174

200

ns

MAX3172

0.5

4

µs

Data Skew

Figure 4

MAX3174

100

ns

Note 2: The charge pump on the MAX3171/MAX3173 can supply V+ and V- to the MAX3172/MAX3174. The V+ and V- input levels

vary with the mode of chipset operation as follows:

V.35/V.28 modes: +5.55V

≤ V+ ≤ +6.50V, -6.50V ≤ V- ≤ -5.45V

Typical operation: V+ = +5.90V, V- = -5.80V

V.10/V.11 modes: +4.20V

≤ V+ ≤ +5.0V, -4.60V ≤ V- ≤ -3.80V

Typical operation: V+ = +4.60V, V- = -4.20V

The MAX3171/MAX3173 are guaranteed to provide these V+/V- supply levels.