SN888C Datasheet, PDF (1/22 Pages) Texas Instruments – Bus-Polarity Correcting RS-485 Transceiver for E-Meters

SN888C
www.ti.com
SLLSEI4 – SEPTEMBER 2013
Bus-Polarity Correcting RS-485 Transceiver for E-Meters
Check for Samples: SN888C
FEATURES
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• Exceeds Requirements of EIA-485 Standard
• Bus-Polarity Correction within 76 ms
• Data Rate: 300 bps to 250 kbps
• Works with Two Configurations:
– Failsafe Resistors Only
– Failsafe and Termination Resistors
• Up to 256 Nodes on a Bus
• SOIC-8 Package for Backward Compatibility
• Bus-Pin Protection:
– ±16 kV HBM protection
– ±12 kV IEC61000-4-2 Contact Discharge
– +4 kV IEC61000-4-4 Fast Transient Burst
APPLICATIONS
• E-meters
DESCRIPTION
The SN888C is a low-power RS-485 transceiver with
bus-polarity correction and transient protection. Upon
hot plug-in the device detects and corrects the bus
polarity within the first 76 ms of bus idling. On-chip
transient protection protects the device against
IEC61000 ESD and EFT transients.
The SN888C is available in an SOIC-8 package. The
device is characterized from –40°C to 85°C.
R
R
RE
DE
D
D
Vcc
1k 
A
B ^{120 }
1k 
Master
SN65HVD82
AB
R
D
POLCOR
Cross-wire
fault 
AB
R
D
POLCOR
R
R
A
RE
B
DE
D
D
Slave
SN888C
R RE DE D
Slave
SN888C
R RE DE D
Slave
SN888C
Figure 1. Typical Network Application With Polarity Correction (POLCOR)
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated