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BUS TRANSCEIVER. SN75ALS170A Datasheet

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BUS TRANSCEIVER. SN75ALS170A Datasheet
















SN75ALS170A TRANSCEIVER. Datasheet pdf. Equivalent













Part

SN75ALS170A

Description

TRIPLE DIFFERENTIAL BUS TRANSCEIVER



Feature


SN75ALS170, SN75ALS170A TRIPLE DIFFERENT IAL BUS TRANSCEIVER D Three Bidirectio nal Transceivers D Driver Meets or Exce eds ANSI Standard EIA/TIA-422-B and RS- 485 and ITU Recommendation V.11 D Two S kew Limits Available D Designed to Oper ate Up to 20 Million Data Transfers per Second (FAST-20 SCSI) D High-Speed Adv anced Low-Power Schottky Circuitry D De signed for Multipo.
Manufacture

Texas Instruments

Datasheet
Download SN75ALS170A Datasheet


Texas Instruments SN75ALS170A

SN75ALS170A; int Transmission on Long Bus Lines in No isy Environments D Wide Positive and Ne gative Input/Output Bus Voltage Ranges D Driver Output Capacity . . . ± 60 mA D Thermal Shutdown Protection D Driver Positive- and Negative-Current Limitin g D Receiver Input Impedances . . . 12 kΩ Min D Receiver Input Sensitivity . . . ± 300 mV Max D Receiver Input Hys teresis . . . 60 mV Ty.


Texas Instruments SN75ALS170A

p D Operate From a Single 5-V Supply D G litch-Free Power-Up and Power-Down Prot ection D Feature Independent Direction Controls for Each Channel SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995 DW PACKAGE (TOP VIEW) 1D 1 1DIR 2 NC 3 GND 4 NC 5 2D 6 2DIR 7 NC 8 3D 9 3DIR 10 20 1B 19 1A 18 NC 17 NC 16 VCC 15 2B 14 2A 13 3B 12 3A 11 NC NC – No i nternal connection J PA.


Texas Instruments SN75ALS170A

CKAGE (TOP VIEW) 1D 1 1DIR 2 GND 3 2D 4 2DIR 5 3D 6 3DIR 7 14 1B 13 1A 12 VCC 11 2B 10 2A 9 3B 8 3A description The SN75ALS170 and SN75ALS170A triple diff erential bus transceivers are monolithi c integrated circuits designed for bidi rectional data communication on multipo int bus transmission lines. It is desig ned for balanced transmission lines and the driver meets .





Part

SN75ALS170A

Description

TRIPLE DIFFERENTIAL BUS TRANSCEIVER



Feature


SN75ALS170, SN75ALS170A TRIPLE DIFFERENT IAL BUS TRANSCEIVER D Three Bidirectio nal Transceivers D Driver Meets or Exce eds ANSI Standard EIA/TIA-422-B and RS- 485 and ITU Recommendation V.11 D Two S kew Limits Available D Designed to Oper ate Up to 20 Million Data Transfers per Second (FAST-20 SCSI) D High-Speed Adv anced Low-Power Schottky Circuitry D De signed for Multipo.
Manufacture

Texas Instruments

Datasheet
Download SN75ALS170A Datasheet




 SN75ALS170A
SN75ALS170, SN75ALS170A
TRIPLE DIFFERENTIAL BUS TRANSCEIVER
D Three Bidirectional Transceivers
D Driver Meets or Exceeds ANSI Standard
EIA/TIA-422-B and RS-485 and ITU
Recommendation V.11
D Two Skew Limits Available
D Designed to Operate Up to 20 Million Data
Transfers per Second (FAST-20 SCSI)
D High-Speed Advanced Low-Power Schottky
Circuitry
D Designed for Multipoint Transmission on
Long Bus Lines in Noisy Environments
D Wide Positive and Negative Input/Output
Bus Voltage Ranges
D Driver Output Capacity . . . ± 60 mA
D Thermal Shutdown Protection
D Driver Positive- and Negative-Current
Limiting
D Receiver Input Impedances . . . 12 kMin
D Receiver Input Sensitivity . . . ± 300 mV Max
D Receiver Input Hysteresis . . . 60 mV Typ
D Operate From a Single 5-V Supply
D Glitch-Free Power-Up and Power-Down
Protection
D Feature Independent Direction Controls for
Each Channel
SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995
DW PACKAGE
(TOP VIEW)
1D 1
1DIR 2
NC 3
GND 4
NC 5
2D 6
2DIR 7
NC 8
3D 9
3DIR 10
20 1B
19 1A
18 NC
17 NC
16 VCC
15 2B
14 2A
13 3B
12 3A
11 NC
NC – No internal connection
J PACKAGE
(TOP VIEW)
1D 1
1DIR 2
GND 3
2D 4
2DIR 5
3D 6
3DIR 7
14 1B
13 1A
12 VCC
11 2B
10 2A
9 3B
8 3A
description
The SN75ALS170 and SN75ALS170A triple differential bus transceivers are monolithic integrated circuits
designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced
transmission lines and the driver meets ANSI Standards EIA/TIA-422-B and RS-485 and both the driver and
receiver meet ITU Recommendation V.11. The SN75ALS170A is designed for FAST-20 SCSI and can transmit
or receive data pulses as short as 30 ns with a maximum skew of 5 ns.
The SN75ALS170 and SN75ALS170A operate from a single 5-V power supply. The drivers and receivers have
active-high and active-low enables, respectively, which are internally connected together to function as a
direction control. The driver differential outputs and the receiver differential inputs are connected internally to
form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the
driver is disabled or VCC = 0. These ports feature wide positive and negative common-mode voltage ranges
making the device suitable for party-line applications.
The SN75ALS170 and the SN75ALS170A are characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
SKEW LIMIT
PART NUMBER
10 ns
SN75ALS170DW SN75ALS170J
5 ns
SN75ALS170ADW
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.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1995, Texas Instruments Incorporated
1




 SN75ALS170A
SN75ALS170, SN75ALS170A
TRIPLE DIFFERENTIAL BUS TRANSCEIVER
SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995
Function Tables
INPUT
D
H
L
X
EACH DRIVER
OUTPUTS
DIR
A
B
H
H
L
H
L
H
L
Z
Z
EACH RECEIVER
DIFFERENTIAL INPUTS
A–B
DIR
OUTPUT
R
VID 0.3 V
L
H
– 0.3 V < VID < 0.3 V
L
?
VID – 0.3 V
L
L
X
H
Z
Open
L
H
H = high level, L = low level, ? = indeterminate,
X = irrelevant, Z = high impedance (off)
logic symbol
logic diagram (positive logic)
2
1DIR
1
1D
EN
EN
1
19
1A
20
1B
2
1DIR
1
1D
19
1A
20
1B
7
2DIR
6
2D
10
3DIR
9
3D
EN
EN
1
EN
EN
1
14
2A
15
2B
12
3A
13
3B
7
2DIR
6
2D
10
3DIR
9
3D
14
2A
15
2B
12
3A
13
3B
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown are for the DW package.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265




 SN75ALS170A
SN75ALS170, SN75ALS170A
TRIPLE DIFFERENTIAL BUS TRANSCEIVER
SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995
schematics of inputs and outputs
EQUIVALENT OF EACH INPUT
VCC
R(eq)
Input
TYPICAL OF A AND B I/O PORTS
VCC
180 k
NOM
Connected
on A Port
A or B
18 k
NOM
3 k
NOM
TYPICAL OF RECEIVER OUTPUT
85 VCC
NOM
Output
Driver Input: R(eq) = 12 kNOM
Enable Inputs: R(eq) = 8 kNOM
R(eq) = equivalent resistor
180 k
NOM
Connected
on B Port
1.1 k
NOM
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage range at any bus terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 7 V to 12 V
Enable input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: DW package . . . . . . . . . . . . . . . . . . 260°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . . . . . . . . . . . . . . . 300°C
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values, except differential I/O bus voltage, are with respect to network ground terminal.
PACKAGE
DW
J
DISSIPATION RATING TABLE
TA 25°C
POWER RATING
1125 mW
1025 mW
DERATING FACTOR
ABOVE TA = 25°C
9.0 mW/°C
8.2 mW/°C
TA = 70°C
POWER RATING
720 mW
656 mW
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
3




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