LTC1546IG#PBF Linear Technology, LTC1546IG#PBF Datasheet

IC SW TRANSCEIVER W/TERM 28-SSOP

LTC1546IG#PBF

Manufacturer Part Number
LTC1546IG#PBF
Description
IC SW TRANSCEIVER W/TERM 28-SSOP
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet

Specifications of LTC1546IG#PBF

Number Of Drivers/receivers
3/3
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
28-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Protocol
-

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FEATURES
TYPICAL
APPLICATIO S
Software-Selectable Transceiver Supports:
RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21
TUV Telecom Services Inc. Certified NET1,
NET2 and TBR2 Compliant
On-Chip Cable Termination
Pin Compatible with LTC1543
Complete DTE or DCE Port with LTC1544
Operates from Single 5V Supply
Small Footprint
Data Networking
CSU and DSU
Data Routers
D4
APPLICATION
R4
LL
18
U
CTS
R3
13
5
Complete DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
DSR
R2
22
6
R1
U
LTC1544
DCD
10
D3
8
DTR
D2
23
20
RTS
D1
19
DB-25 CONNECTOR
4
1
DESCRIPTIO
The LTC
ceiver with on-chip cable termination. When combined with
the LTC1544, this chip set forms a complete software-
selectable DTE or DCE interface port that supports the
RS232, RS449, EIA530, EIA530-A, V.35, V.36 and X.21
protocols. All necessary cable termination is provided inside
the LTC1546. In most applications, the LTC1546 replaces
both an LTC1543 and an LTC1344A without any changes to
the PC board.
The LTC1546 runs from a single 5V supply using an internal
charge pump that requires only five space-saving surface
mounted capacitors. The LTC1546 is available in a 28-lead
SSOP surface mount package.
7
, LTC and LT are registered trademarks of Linear Technology Corporation.
Multiprotocol Transceiver
16
RXD
R3
T
3
®
1546 is a 3-driver/3-receiver multiprotocol trans-
RXC
9
R2
T
Software-Selectable
17
R1
U
LTC1546
with Termination
12
TXC
D3
T
15
SCTE
11
D2
T
24
14
TXD
D1
T
LTC1546
2
1546 TA01
1

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LTC1546IG#PBF Summary of contents

Page 1

... PC board. The LTC1546 runs from a single 5V supply using an internal charge pump that requires only five space-saving surface mounted capacitors. The LTC1546 is available in a 28-lead SSOP surface mount package. , LTC and LT are registered trademarks of Linear Technology Corporation. DCD DTR RTS RXD ...

Page 2

LTC1546 ABSOLUTE AXI U RATI GS (Note 1) Supply Voltage ....................................................... 6.5V Input Voltage Transmitters ........................... – 0. Receivers ............................................... – 18V to 18V Logic Pins .............................. – 0. Output Voltage Transmitters ................. ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER f Charge Pump Oscillator Frequency OSC t Charge Pump Rise Time r Logic Inputs and Outputs V Logic Input High Voltage IH V Logic Input Low Voltage IL I ...

Page 4

LTC1546 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER I Transmitter Output High Current OH I Transmitter Output Low Current OL I Transmitter Output Leakage Current OZ R Transmitter Differential Mode Impedance OD R Transmitter Common Mode ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS V.11 Mode Supply Current vs Data Rate 180 170 160 150 140 130 120 110 100 90 10 100 1000 10000 DATA RATE (kBd) 1546 • G01 V.11 Mode I vs Temperature CC ...

Page 6

LTC1546 CTIO (Pin 15): Receiver 3 Noninverting Input (Pin 16): Receiver 3 Inverting Input (Pin 17): Receiver 2 Noninverting Input (Pin 18): Receiver 2 Inverting Input. ...

Page 7

TEST CIRCUITS 1546 F01 Figure 1. V.11 Driver DC Test Circuit – Figure 3. Input Impedance Test ...

Page 8

LTC1546 W U ODE SELECTIO Table 1 LTC1546 MODE NAME M2 Not Used (Default V.11) 0 RS530A 0 RS530 0 X.21 0 V.35 1 RS449/V.36 1 V.28/RS232 1 No Cable 1 Not Used (Default V.11) 0 RS530A 0 RS530 0 ...

Page 9

U W SWITCHI WAVEFOR 1. PHL – 1. PHL APPLICATIO S I FOR ATIO ...

Page 10

LTC1546 U U APPLICATIO S I FOR ATIO DTE SERIAL LTC1546 CONTROLLER TXD D1 D2 SCTE D3 R1 TXC RXC R2 RXD R3 LTC1544 RTS D1 DTR D2 D3 DCD R1 DSR R2 R3 CTS Figure 17. ...

Page 11

U U APPLICATIO S I FOR ATIO (DATA LTC1546 DCE/DTE 14 DCE/DTE LTC1544 (DATA) Figure 18: Single Port DCE V.35 Mode Selection in the Cable V.10 (RS423) ...

Page 12

LTC1546 U U APPLICATIO S I FOR ATIO ' 20k 6k R6 10k 10k 20k ' GND Figure 21. V.10 Receiver Configuration BALANCED INTERCONNECTING GENERATOR CABLE TERMINATION ' A ...

Page 13

U U APPLICATIO S I FOR ATIO V.35 Interface A typical V.35 balanced interface is shown in Figure 26. A V.35 differential generator with outputs A and B and ground C is connected to a differential receiver with input ' ...

Page 14

LTC1546 U U APPLICATIO S I FOR ATIO The LTC1546/LTC1544 can be configured for either DTE or DCE operation in one of two ways: a dedicated DTE or DCE port with a connector of appropriate gender or a port with ...

Page 15

U TYPICAL APPLICATIO TXD SCTE TXC RXC RXD C10 1 F RTS DTR DCD DSR CTS Figure 29. Controller-Selectable Multiprotocol DTE Port with DB-25 Connector ...

Page 16

LTC1546 U TYPICAL APPLICATIO RXD RXC TXC SCTE TXD C10 1 F CTS DSR DCD DTR RTS Figure 30. Controller-Selectable DCE Port with DB-25 Connector ...

Page 17

U TYPICAL APPLICATIO S DTE_TXD/DCE_RXD DTE_SCTE/DCE_RXC DTE_TXC/DCE_TXC DTE_RXC/DCE_SCTE DTE_RXD/DCE_TXD C10 1 F DTE_RTS/DCE_CTS DTE_DTR/DCE_DSR DTE_DCD/DCE_DCD DTE_DSR/DCE_DTR DTE_CTS/DCE_RTS DTE_LL/DCE_LL DCE/DTE Figure 31. Controller-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector ...

Page 18

LTC1546 U TYPICAL APPLICATIO S DTE_TXD/DCE_RXD DTE_SCTE/DCE_RXC DTE_TXC/DCE_TXC DTE_RXC/DCE_SCTE DTE_RXD/DCE_TXD C10 1 F DTE_RTS/DCE_CTS DTE_DTR/DCE_DSR DTE_DCD/DCE_DCD DTE_DSR/DCE_DTR DTE_CTS/DCE_RTS DTE_LL/DCE_RI DTE_RI/DCE_LL DTE_TM/DCE_RL DTE_RL/DCE_TM DCE/DTE Figure 32. Controller-Selectable Multiprotocol DTE/DCE Port with RL, LL, TM and DB-25 Connector 18 ...

Page 19

... Figure 33. Cable-Selectable Multiprotocol DTE/DCE Port with DB-25 Connector Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 20

... Companion to LTC1546 or LTC1543 for Control Signals Including LL, TM and 7.65 – 7.90 (0.301 – 0.311 1.73 – 1.99 (0.068 – 0.078) 0.05 – 0.21 (0.002 – 0.008) G28 SSOP 1098 sn1546 1546fs LT/LCG 1200 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 ...

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