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DS276S+T&R

Description
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOIC-8
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size143KB,11 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric View All

DS276S+T&R Overview

Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT, SOIC-8

DS276S+T&R Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Reach Compliance Codecompliant
ECCN codeEAR99
Differential outputNO
Number of drives1
High level input current maximum value0.000001 A
Input propertiesSCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-232-E
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Minimum output swing10 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply3/5 V
Certification statusNot Qualified
Maximum receive delay
Number of receiver bits1
Maximum seat height1.75 mm
Maximum slew rate5 mA
Maximum supply voltage5.5 V
Minimum supply voltage2.7 V
Nominal supply voltage3 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
Base Number Matches1
DS276
Low Power Transceiver Chip
www.dalsemi.com
FEATURES
Low-power serial transmitter/receiver for
battery-backed systems
Transmitter steals power from receive signal
line to save power
Single 3V or 5V operation
Full duplex operation up to 20k bps
Ultra-low static current
Compatible with RS-232-E signals
PIN ASSIGNMENT
RX
OUT
V
DRV+
TX
IN
GND
1
2
3
4
8
7
6
5
V
CC
RX
IN
V
DRV-
TX
OUT
DS276 8-Pin DIP (300-mil)
DS 276S 8-Pin SOIC (150-mil)
PIN DESCRIPTION
RX
OUT
V
DRV+
TX
IN
GND
TX
OUT
V
DRV-
RX
IN
V
CC
RS-232 Receiver Output
Transmit Driver Positive Supply
RS-232 Driver Input
System Ground (0V)
RS-232 Driver Output
Transmit Driver Negative Supply
RS-232 Receiver Input
System Logic Supply (3-5V)
ORDERING INFORMATION
DS276
DS276S
8-Pin DIP
8-Pin SOIC
DESCRIPTION
The DS276 Line-Powered RS-232 Transceiver Chip is a CMOS device that provides a low-cost, very
low-power interface to RS-232 serial ports. The receiver input translates RS-232 signal levels to common
CMOS/TTL levels. The transmitter can be used with independently supplied positive and negative
supplies, but in most cases will be used with the positive supply, sharing the logic supply and the negative
supply stolen from the receive RS-232 signal when that signal is in a negative state (marking). By using
an external reservoir capacitor and Schottky diode (see Figure 4) this negative supply can be maintained
even during full-duplex operation. Since most serial communication ports remain in a negative state
statically, using the receive signal for negative power greatly reduces the DS276’s static power
consumption. This feature is especially important for battery-powered systems such as laptop computers,
remote sensors, and portable medical instruments. During an actual communication session, the DS276’s
transmitter will use system power (3-12 volts) for positive transitions while still employing the receive
signal for negative transitions.
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