ISL3179EFUZ-T Просмотр технического описания (PDF) - Renesas Electronics

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ISL3179EFUZ-T

High ESD Protected, +125°C, 40Mbps, 3.3V, Full Fail-Safe RS-485/RS-422 Transceivers

Renesas Electronics 

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ISL3179E, ISL3180E

High ESD Protected, +125°C, 40Mbps, 3.3V, Full Fail-Safe RS-485/RS-422

Transceivers

FN6365

Rev. 6.00

Nov 9, 2017

The ISL3179E and ISL3180E are high ESD protected (see

Table 2 on page 2), 3.3V powered, single transceivers that

meet both the RS-485 and RS-422 standards for balanced

communication. Each device has low bus currents

(+220µA/-150µA), so they present a “1/5 unit load” to the

RS-485 bus. This allows up to 160 transceivers on the network

without violating the RS-485 specification’s 32 unit load

maximum, and without using repeaters.

Receiver (Rx) inputs feature a “full fail-safe” design, which

ensures a logic high Rx output if Rx inputs are floating,

shorted, or terminated but undriven.

The ISL3180E is configured for full duplex applications. The

ISL3179E half duplex version multiplexes the Rx inputs and Tx

outputs to allow a transceiver with an output disable function

in 8 Ld packages.

Hot plug circuitry ensures that the Tx and Rx outputs remain in

a high impedance state while the power supply stabilizes.

Related Literature

• For a full list of related documents, visit our website

- ISL3179E and ISL3180E product pages

Applications

• Motor controller/position encoder systems

• Factory automation

• Field bus networks

• Security networks

• Building environmental control systems

• Industrial/process control networks

Features

• High ESD protection on RS-485 I/O pins

- ISL3179E. . . . . . . . . . . . . . . . . . . . . . . . . ±16.5kV IEC61000

- ISL3180E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±12kV HBM

- Class 3 HBM level on all other pins (ISL3179E) . . . . . >9kV

• Specified for +125°C operation

• High data rates. . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40Mbps

• 5V tolerant logic inputs

• 1/5 unit load allows up to 160 devices on the bus

• Full fail-safe (open, shorted, terminated/undriven) receiver

• Hot plug - Tx and Rx outputs remain three-state during

power-up

• Low quiescent current . . . . . . . . . . . . . . . . . . . . . . . 4mA (max)

• Low current shutdown mode . . . . . . . . . . . . . . . . . 1µA (max)

• -7V to +12V common-mode input voltage range

• Three-state Rx and Tx outputs

• 16/16.5ns (max) Tx/Rx propagation delays; 1.5ns (max) skew

• Operates from a single +3.3V supply (10% tolerance)

• Current limiting and thermal shutdown for driver overload

protection

• Pb-free (RoHS compliant)

TABLE 1. KEY DIFFERENCES BETWEEN HIGH-SPEED INTERFACE

FAMILY OF PARTS

PART

NUMBER

FULL/HALF

DUPLEX

VCC VOD

(V) (V)

DATA RATE

(Mbps)

ISL3179E

Half

3.3 1.5

40

ISL3180E

Full

3.3 1.5

40

ISL3159E

Half

5

2.1

40

ISL3259E

Half

5

2.1

100

+3.3V

(SOIC AND MSOP PIN NUMBERS SHOWN)

+3.3V

+

0.1µF

8

VCC

1 RO R

2 RE

B/Z 7

RT

3 DE

A/Y 6

+

0.1µF

RT

7

6

8

VCC

B/Z

A/Y

D DI 4

DE 3

RE 2

4 DI D

GND

5

R

GND

5

RO 1

FIGURE 1. TYPICAL OPERATING CIRCUIT - ISL3179E

FN6365 Rev. 6.00

Nov 9, 2017

Page 1 of 18

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