120



A

B

D

DE

R

RE

D

R

Vcc

1k



A

B

D

DE

R

RE

D

R

A

B

D

DE

R

POLCOR

D

R

RE

A

B

D

DE

R

POLCOR

D

R

RE

Master

SN65HVD82

Slave

SN888C

Slave

SN888C

Slave

SN888C

Cross-wire

1k



SN888C

www.ti.com

SLLSEI4 – SEPTEMBER 2013

Bus-Polarity Correcting RS-485 Transceiver for E-Meters

Check for Samples: SN888C

1

FEATURES

APPLICATIONS

•

Exceeds Requirements of EIA-485 Standard

•

E-meters

•

Bus-Polarity Correction within 76 ms

DESCRIPTION

•

Data Rate: 300 bps to 250 kbps

The SN888C is a low-power RS-485 transceiver with

•

Works with Two Configurations:

bus-polarity correction and transient protection. Upon

–

Failsafe Resistors Only

hot plug-in the device detects and corrects the bus

polarity within the first 76 ms of bus idling. On-chip

–

Failsafe and Termination Resistors

transient

protection

protects

the

device

against

•

Up to 256 Nodes on a Bus

IEC61000 ESD and EFT transients.

•

SOIC-8 Package for Backward Compatibility

The SN888C is available in an SOIC-8 package. The

•

Bus-Pin Protection:

device is characterized from –40°C to 85°C.

–

±16 kV HBM protection

–

±12 kV IEC61000-4-2 Contact Discharge

–

+4 kV IEC61000-4-4 Fast Transient Burst

Figure 1. Typical Network Application With Polarity Correction (POLCOR)

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.