SN75ALS1177_06 Datasheet, PDF (1/14 Pages) Texas Instruments – DUAL DIFFERENTIAL DRIVERS AND RECEIVERS

SN75ALS1177, SN75ALS1178
DUAL DIFFERENTIAL DRIVERS AND RECEIVERS
D Meet or Exceed Standards TIA/EIA-422-B
and TIA/EIA-485-A
D Designed for Multipoint Bus Transmission
on Long Bus Lines in Noisy Environments
D Low Supply-Current Requirement
50 mA Max
D Driver Positive- and Negative-Current
Limiting
D Driver Common-Mode Output Voltage
Range of –7 V to 12 V
D Thermal Shutdown Protection
D Driver 3-State Outputs Active-High Enable
D Receiver Common-Mode Input Voltage
Range of –12 V to 12 V
D Receiver Input Sensitivity . . . ±200 mV
D Receiver Hysteresis . . . 50 mV Typ
D Receiver High Input
Impedance . . . 12 kΩ Min
D Receiver 3-State Outputs Active-Low
Enable for SN75ALS1177 Only
D Operate From Single 5-V Supply
SLLS154B – MARCH 1993 – REVISED FEBRUARY 2001
SN75ALS1177 . . . N OR NS PACKAGE
(TOP VIEW)
1B 1
1A 2
1R ³
RE ⁴
2R ⁵
2A ⁶
2B ⁷
GND ⁸
16 V_CC
15 1D
14 _1Y
13 _1Z
12 _DE
11 _2Z
10 _2Y
9 _2D
SN75ALS1178 . . . N OR NS PACKAGE
(TOP VIEW)
1B ¹
1A ²
1R ³
1DE ⁴
2R ⁵
2A ⁶
2B ⁷
GND ⁸
16 V_CC
15 1D
14 1Y
13 1Z
12 2DE
11 2Z
10 _2Y
9 _2D
description
The SN75ALS1177 and SN75ALS1178 dual differential drivers and receivers are integrated circuits designed
for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced
transmission lines and meet standards TIA/EIA-422-B and TIA/EIA-485-A.
The SN75ALS1177 combines dual 3-state differential line drivers and dual 3-state differential input line
receivers, both of which operate from a single 5-V power supply. The drivers and receivers have active-high
and active-low enables, respectively, which can be externally connected together to function as direction
control. The SN75ALS1178 drivers each have an individual active-high enable. Fail-safe design ensures that
when the receiver inputs are open, the receiver outputs are always high.
The SN75ALS1177 and SN75ALS1178 are characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
PACKAGED DEVICES
TA
PLASTIC
DIP
PLASTIC
SMALL OUTLINE
(N)
(NS)
SN75ALS1177N SN75ALS1177NSR
0°C to 70°C
SN75ALS1178N SN75ALS1178NSR
The NS package is only available taped and reeled. Add the
suffix R to the device type (e.g., SN75ALS1177NSR).
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.
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Copyright  2001, Texas Instruments Incorporated
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