sp338e Exar Corporation, sp338e Datasheet

no-image

sp338e

Manufacturer Part Number
sp338e
Description
Rs-232/rs-485/rs-422 Transceiver With Internal Termination
Manufacturer
Exar Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
sp338eCR1-L
Manufacturer:
Exar
Quantity:
980
Part Number:
sp338eER1-L
Manufacturer:
Zilog
Quantity:
198
Part Number:
sp338eER1-L/TR
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
NOVEMBER 2011
GENERAL DESCRIPTION
The SP338 is an advanced multiprotocol transceiver
supporting RS-232, RS-485, and RS-422 serial
standards in a 40 pin QFN package. Integrated cable
termination and four configuration modes allow all
three protocols to be used interchangeably over a
single cable or connector with no additional switching
components. Full operation requires only four
external charge pump capacitors.
The RS-485/422 modes feature up to two drivers and
four receivers (2TX/4RX) in half, full, and mixed
duplex configurations. The RS-232 mode (3TX/5RX)
provides full support of all eight signals commonly
used with the DB9 RS-232 connector. A dedicated
diagnostic loopback mode is also provided.
The high speed drivers operate up to 20Mbps in RS-
485/422 modes, and up to 1Mbps in RS-232 mode.
All drivers can be slew limited to 250kbps in any
mode to minimize electromagnetic interference (EMI).
All transmitter outputs and receiver inputs feature
robust electrostatic discharge (ESD) protection to
±15kV Human Body Model (HBM) and ±8kV IEC-
61000-4-2 Contact. Each receiver output has full fail-
safe protection to avoid system lockup, oscillation, or
indeterminate states by defaulting to logic-high output
level when the inputs are open, shorted, or
terminated but undriven. No external biasing resistors
are required.
The RS-232 receiver inputs include a 5kΩ pull-down
to ground. The RS-485/422 receiver inputs are high
impedance (>96kΩ when termination is disabled),
allowing
communication bus (1/8th unit load).
The SP338 operates from a single power supply,
either 3.3V or 5V, with low idle current. The shutdown
mode consumes less than 10µA for low power
standby operation.
ORDERING INFORMATION
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
SP338EER1-L
SP338EER1-L/TR
SP338ECR1-L
SP338ECR1-L/TR
P
ART
up
N
UMBER
to
256
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
devices
40-pin QFN
40-pin QFN
40-pin QFN
40-pin QFN
P
on
ACKAGE
a
single
(510) 668-7000
FEATURES
TYPICAL APPLICATIONS
O
Pin selectable Cable Termination
No external resistors required for RS-485/422
termination and biasing
3.3V or 5V Single Supply Operation
Robust ESD Protection on bus pins
Max Data Rate of 20Mbps in RS-485/422 Modes
and up to 1Mbps in RS-232 Modes
Pin selectable 250kbps Slew Limiting
3 Drivers, 5 Receivers RS-232/V.28
2 Drivers, 4 Receivers RS-485/422
RS-485/422 Enhanced Failsafe for open, shorted,
or terminated but idle inputs
Space saving 6mm x 6mm QFN-40 Package
Pin compatible with SP339E
Dual Protocol Serial Ports (RS-232 or RS-485/422)
Industrial Computers
Industrial and Process Control Equipment
Point-Of-Sale Equipment
Networking Equipment
HVAC Controls Equipment
Building Security and Automation Equipment
PERATING
±15kV Human Body Model (HBM)
±8kV IEC 61000-4-2 (Contact)
Full, Half, and Mixed Duplex Configurations
1/8th Unit Load, up to 256 receivers on bus
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
T
FAX (510) 668-7017
EMPERATURE
R
ANGE
www.exar.com
SP338E
D
EVICE
Active
Active
Active
Active
REV. 1.0.0
S
TATUS

Related parts for sp338e

sp338e Summary of contents

Page 1

... PERATING EMPERATURE 40-pin QFN -40°C to +85°C 40-pin QFN -40°C to +85°C 40-pin QFN 0°C to +70°C 40-pin QFN 0°C to +70°C • • (510) 668-7000 FAX (510) 668-7017 SP338E REV. 1.0 ANGE EVICE TATUS Active Active Active Active • www.exar.com ...

Page 2

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections to the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device ...

Page 3

... R1 Disable T2 Enable Enables RS-485/422 receiver termination Inverts DIR1 and DIR2, where applicable ENABLE = V for operation, ENABLE = 0V for shutdown SP338E 101, 110, 111, Figure 6 Figure 7 Figure Output R1 Output R1 Output T1 Input T1 Input T1 Input Output ...

Page 4

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION PIN DESCRIPTIONS BY MODE (MODE2, MODE1, MODE0) 000, 001, Pin Name Figure 1 Figure Input Input 23 GND Output Input 26 GND Output Output 29 GND Input Input 32 VCC ...

Page 5

... V 2.4 V 0.8 V µA 1 µA 1 µA 50 200 -0.6 CC 0.4 V ±20 ±60 mA µA ±0.1 ±1 5 SP338E = 3.3V +25° ONDITIONS No load, idle inputs No load, idle inputs ENABLE = 3. 5.0V CC Input Low (V = 0V) IN Input High ( pins 3, 4 and 6 Input High ( ...

Page 6

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION ELECTRICAL CHARACTERISTICS (Continued NLESS OTHERWISE NOTED V = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1µ YMBOL ARAMETERS SINGLE-ENDED RECEIVER INPUTS (RS-232) V Input Voltage Range IN V Input Threshold Low IL V Input Threshold High IH V Input Hysteresis HYS R Input Resistance ...

Page 7

... -0.2 +0 0.2 V ±250 mA µA ±100 7 SP338E = 3.3V +25° ONDITIONS TERM = 0V, -7V ≤ V ≤ +12V +12V -7V IN TERM = V , Figure 9 CC -7V ≤ V ≤ +12V CM TERM = V , Figure ...

Page 8

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION TIMING CHARACTERISTICS U : NLESS OTHERWISE NOTED V = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1µ YMBOL ARAMETERS ALL MODES t Enable from Shutdown ENABLE t Enable to Shutdown SHUTDOWN RS-232, DATA RATE = 250kbps (SLEW = Vcc), ONE TRANSMITTER SWITCHING Maximum Data Rate ...

Page 9

... Mbps 150 100 200 ns 200 ns 200 ns 200 ns 9 SP338E = 3.3V +25° ONDITIONS Ω 50pF 15pF, Figure 54Ω 50pF Figure 15pF, Figure 500Ω 50pF, ...

Page 10

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION BLOCK DIAGRAM BY MODE (MODE2, MODE1, MODE0 000 - L IGURE ODE OOPBACK 10 REV. 1.0.0 ...

Page 11

... RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0 001 - RS-232 IGURE ODE 11 SP338E ...

Page 12

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION 010 - RS-485 H IGURE ODE ALF D #1 UPLEX 12 REV. 1.0.0 ...

Page 13

... RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0 011 - RS-485/422 F IGURE ODE D #1 ULL UPLEX 13 SP338E ...

Page 14

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION 100 - RS-485/422 F IGURE ODE D #2 ULL UPLEX 14 REV. 1.0.0 ...

Page 15

... RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0 101 - RS-485/422 F IGURE ODE D #3 ULL UPLEX 15 SP338E ...

Page 16

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION 110 - RS-485 H IGURE ODE ALF D #2 UPLEX 16 REV. 1.0.0 ...

Page 17

... RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0 111 - RS-485/422 M IGURE ODE D IXED UPLEX 17 SP338E ...

Page 18

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION TEST FIXTURES F 9. RS-485/422 R T IGURE ECEIVER F 10. RS-485/422 D IGURE IFFERENTIAL F 11. RS-485/422 D IGURE IFFERENTIAL R ERMINATION ESISTANCE RIVER UTPUT OLTAGE RIVER UTPUT OLTAGE OVER 18 REV. 1.0 OMMON ODE ...

Page 19

... RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.0 F 12. RS-485/422 D O IGURE RIVER F 13. RS-232 R P IGURE ECEIVER ROPAGATION UTPUT HORT IRCUIT URRENT D ELAY 19 SP338E ...

Page 20

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION F 14. RS-232 D P IGURE RIVER ROPAGATION F 15. RS-485/422 R IGURE ECEIVER D ELAY P D ROPAGATION ELAY 20 REV. 1.0.0 ...

Page 21

... RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.0 F 16. RS-485/422 D P IGURE RIVER F 17. RS-485/422 R IGURE ECEIVER ROPAGATION ELAY AND ISE ALL UTPUT NABLE ISABLE IMES 21 SP338E T IMES ...

Page 22

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION F 18. RS-485/422 D O IGURE RIVER UTPUT NABLE ISABLE IMES 22 REV. 1.0.0 ...

Page 23

... The SP338 includes a diagnostic digital loop back mode for system testing as shown in mode connects the TTL driver inputs to the TTL receiver outputs, bypassing the analog driver and receiver circuitry. The analog/bus pins are internally disconnected in this mode. Figure 1 23 SP338E . The loopback ...

Page 24

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION PACKAGE DRAWINGS F 19. QFN40 IGURE 24 REV. 1.0.0 ...

Page 25

... SP338E RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REVISION HISTORY D R ATE EVISION November 2011 1.0.0 Production Release EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement ...

Related keywords