SN55110A, SN75110A, SN75112
DUAL LINE DRIVERS
SLLS106E – DECEMBER 1975 – REVISED APRIL 2000
SN55110A . . . J OR W PACKAGE
SN75110A, SN75112 . . . D OR N PACKAGE
(TOP VIEW)
Improved Stability Over Supply Voltage and
Temperature Ranges
Constant-Current Outputs
High Speed
1A
1B
V
CC+
1
2
3
4
5
6
7
14
13
12
11
10
9
1Y
1Z
V
Standard Supply Voltages
High Output Impedance
1C
2C
CC–
High Common-Mode Output Voltage Range
. . . –3 V to 10 V
2A
D
2B
2Z
2Y
TTL-Input Compatibility
GND
8
Inhibitor Available for Driver Selection
Glitch-Free During Power Up/Power Down
SN55110A . . . FK PACKAGE
(TOP VIEW)
SN75112 and External Circuit Meets or
Exceeds the Requirements of CCITT
Recommendation V.35
Package Options Include Plastic
Small-Outline (D), Package, and Ceramic
Chip Carriers (FK), Standard Plastic (N) and
Ceramic (J) DIPs
3
2
1 20 19
18
1Z
NC
V
1C
NC
2C
NC
2A
4
5
6
7
8
17
16
15
14
CC–
NC
D
description
9 10 11 12 13
The SN55110A, SN75110A, and SN75112 dual
line drivers have improved output current
regulation with supply voltage and temperature
variations. In addition, the higher current of the
SN75112 (27 mA) allows data to be transmitted
over longer lines. These drivers offer optimum
performance when used with the SN55107A,
SN75107A, and SN75108A line receivers.
NC – No internal connection
These drivers feature independent channels with common voltage supply and ground terminals. The significant
difference between the three drivers is in the output-current specification. The driver circuits feature a constant
output current that is switched to either of two output terminals by the appropriate logic levels at the input
terminals. The output current can be switched off (inhibited) by low logic levels on the enable inputs. The output
current is nominally 12 mA for the ’110A devices, and is 27 mA for the SN75112.
The enable/inhibit feature is provided so the circuits can be used in party-line or data-bus applications. A strobe
or inhibitor (enable D), common to both drivers, is included for increased driver-logic versatility. The output
current in the inhibited mode, I
, is specified so that minimum line loading is induced when the driver is used
O(off)
in a party-line system with other drivers. The output impedance of the driver in the inhibited mode is very high.
The output impedance of a transistor is biased to cutoff.
The driver outputs have a common-mode voltage range of –3 V to 10 V, allowing common-mode voltage on the
line without affecting driver performance.
All inputs are diode clamped and are designed to satisfy TTL-system requirements. The inputs are tested at
2 V for high-logic-level input conditions and 0.8 V for low-logic-level input conditions. These tests ensure
400-mV noise margin when interfaced with TTL Series 54/74.
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.
Copyright 2000, Texas Instruments Incorporated
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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