SN55109A, SN55110A
SN75109A, SN75110A, SN75112
DUAL LINE DRIVERS
SLLS106B – DECEMBER 1975 – REVISED MAY 1995
• Improved Stability Over Supply Voltage and
SN55109A, SN55110A . . . J OR W PACKAGE
SN75109A, SN75110A, SN75112 . . . D OR N PACKAGE
Temperature Ranges
(TOP VIEW)
• Constant-Current Outputs
• High Speed
• Standard Supply Voltages
• High Output Impedance
1A
1B
V
1
2
3
4
5
6
7
14
13
12
11
10
9
CC+
1Y
1Z
V
1C
2C
CC –
• High Common-Mode Output Voltage Range
2A
D
–3 V to 10 V
2B
2Z
2Y
• TTL-Input Compatibility
• Inhibitor Available for Driver Selection
• Glitch-Free During Power Up/Power Down
• SN75112 and External Circuit Meets or
Exceeds the Requirements of CCITT
Recommendation V.35
GND
8
SN55109A, SN55110A . . . FK PACKAGE
(TOP VIEW)
description
3
2
1
20 19
18
1Z
NC
V
1C
NC
2C
NC
2A
4
5
6
7
8
The
SN55109A,
SN55110A,
SN75109A,
17
16
15
14
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, SN55108A, SN75107A, and
SN75108A line receivers.
CC –
NC
D
9 10 11 12 13
NC – No internal connection
These drivers feature independent channels with
common voltage supply and ground terminals.
The significant difference between the three
THE SN75109A IS NOT
RECOMMENDED FOR NEW DESIGNS
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 6 mA for the
’109A, 12 mA for the ’110A, and 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.
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP CARRIER CERAMIC DIP
(FK) (J)
CERAMIC
FLATPACK
(W)
T
A
SMALL OUTLINE
(D)
PLASTIC DIP
(N)
SN75109AD
SN75110AD
SN75112D
SN75109AN
SN75110AN
SN75112N
0°C to 70°C
SN55109AFK
SN55110AFK
SN55109AJ
SN55110AJ
SN55109AJ
SN55110AJ
SN55109AW
SN55110AW
–55°C to 125°C
The D package is available taped and reeled. Add the suffix R to the device type, (e.g., SN75110ADR).
Copyright 1995, 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.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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