MAX3160(2000) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX3160
(Rev.:2000)

+3.0V to +5.5V, 1µA, RS-232/RS-485/422 Multiprotocol Transceivers

Maxim Integrated 

+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

RS-232 Transmitters

Table 1. MAX3160

INPUTS

SHDN

RS-485/

RSC-2C3C2

0

X

1

0

1

0

1

1

DI/T1IN,

DE485/T2IN

X

0

1

X

OUTPUTS

Z(B)/T1OUT,

Y(A)/T2OUT

1/8-unit load

1

0

RS-485 mode

Table 2. MAX3161

INPUTS

SHDN

RS-485/

RSC-2C3C2

0

X

1

0

1

0

1

1

DI/T1IN,

DE485/T2IN

X

0

1

X

OUTPUTS

T1OUT,

T2OUT

High-Z

1

0

High-Z

Table 3. MAX3162

INPUTS

SHDN

TE232

0

X

X

0

1

1

1

1

T1IN,T2IN

X

X

0

1

OUTPUTS

T1OUT,

T2OUT

High-Z

High-Z

1

0

High Data Rates

The MAX3160/MAX3161/MAX3162 maintain the RS-232

±5.0V required minimum transmitter output voltage even

at high data rates. Figure 11 shows a transmitter loop-

back test circuit. Figure 12 shows a loopback test result

at 250kbps, and Figure 13 shows the same test at

1000kbps. Figure 12 demonstrates a single slew-rate

limited transmitter driven at 250kbps (FAST = GND) into

an RS-232 load in parallel with 1000pF. Figure 13 shows

Table 4. MAX3160

INPUTS

SHDN

RS-485/

RS-232

X

0

X

0

X

0

X

1

Table 5. MAX3161

SHDN

INPUTS

RS-485/

RSC-2C3C2

X

0

X

0

X

0

X

1

Truth Tables

RS-232 Receivers

B/R1IN,

A/R2IN

0

1

Inputs Open

X

OUTPUTS

R1OUT,

RO/R2OUT

1

0

1

R1OUT

High-Z,

RO/R2OUT in

RS-485 mode

R1IN, R2IN

0

1

Inputs Open

X

OUTPUTS

R1OUT,

RO/R2OUT

1

0

1

R1OUT

High-Z,

RO/R2OUT in

RS-485 mode

Table 6. MAX3162

SHDN

INPUTS

RSC-2C3C2

X

1

X

0

X

0

X

0

R1IN,R2IN

X

0

1

Inputs open

OUTPUTS

R1OUT,

R2OUT

High-Z

1

0

1

a single transmitter driven at 1Mbps (FAST asserted),

loaded with an RS-232 receiver in parallel with 1000pF.

These transceivers maintain the RS-232 ±5.0V minimum

transmitter output voltage at data rates up to 1Mbps.

256 Transceivers on the Bus

The standard RS-485 receiver input impedance is

12kΩ (one-unit load), and the standard driver can drive

up to 32-unit loads. The MAX3160 has a 1/4-unit load

16 ______________________________________________________________________________________

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