TI LT1039

LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
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Meets All EIA-232-D (Revision of RS-232-C)
Specifications
DW OR N PACKAGE
(TOP VIEW)
Three Independent Drivers and Receivers
Per Package
VDD+
BIAS
R1IN
D1OUT
R2IN
D2OUT
R3IN
D3OUT
VDD –
EIA-232 Inputs and Outputs Withstand
±30 V
3-State Outputs
All Outputs Are Short-Circuit Protected
Virtually Zero Supply Current When
Shutdown
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
9
10
VCC
ON/OFF
R1OUT
D1IN
R2OUT
D2IN
R3OUT
D3IN
GND
Output of Several Devices Can Be
Paralleled
Operates From ±5-V to ±15-V Supplies
Designed to Be Interchangeable With
Linear Technology LT1039
description
The LT1039 is a triple EIA-232 line transceiver designed to meet the requirements of Standard EIA-232-D. All
outputs are fully protected against an overload or short to ground. A major advantage of the LT1039 is
high-impedance output states when the device is off or powered down. This feature allows several different
devices to be connected together on the same bus.
The bias pin provides a receiver to be kept alive when the LT1039 is shutdown (ON/OFF = low).
The LT1039 is characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
PACKAGE
TA
SMALL OUTLINE
(DW)
0°C to 70°C
LT1039CDW
PLASTIC DIP
(N)
LT1039CN
The DW package is available taped and reeled. Add the suffix R to the
device type (i.e., LT1039CDWR).
Copyright  1992, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–1
LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
logic symbol†
ON/OFF
BIAS
R1IN
17
EN
2
16
3
5
14
R3IN 7
4
D1OUT
D2OUT 6
12
D3OUT 8
11
R2IN
15
13
R1OUT
R2OUT
R3OUT
D1IN
D2IN
D3IN
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram
ON/OFF
BIAS
R1IN
R2IN
R3IN
D1OUT
D2OUT
D3OUT
2–2
17
2
3
16
5
14
7
12
4
15
6
13
8
11
POST OFFICE BOX 655303
R1OUT
R2OUT
R3OUT
D1IN
D2IN
D3IN
• DALLAS, TEXAS 75265
LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
Terminal Functions
PIN
DESCRIPTION
NAME
NO.
BIAS
2
D1IN, D2IN, D3IN
15, 13,
11
Line driver inputs. Operate properly on TTL or CMOS levels. Output valid from VI = (VDD –) + (2 to 15 V).
Connect to 5 V when not used.
D1OUT, D2OUT,
D3OUT
4, 6, 8
Line driver outputs
Keeps receiver 1 alive while the LT1039 is in the shutdown mode. Leave BIAS open when not in use.
GND
10
Ground
ON/OFF
17
Shuts down entire circuit. Cannot be left open. If VIL is at or near 0.8 V, significant settling time may be required.
R1IN, R2IN, R3IN
3, 5, 7
Receiver inputs. Input impedance is normally 30 kΩ. Accepts EIA-232 voltage levels and has 0.4 V of
hysteresis to provide noise immunity.
R1OUT, R2OUT,
R3OUT
16, 14,
12
Receiver outputs with TTL/CMOS voltage levels
VDD +
VDD –
1
Positive supply voltage for driver
9
Negative supply voltage for driver
VCC
18
5-V supply voltage for receivers
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VDD + (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 15 V
Supply voltage range, VDD – . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to – 15 V
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage range, driver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VDD – to 25 V
receiver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30 V
Input voltage range, ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 12 V
Output voltage range, driver output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VDD+ – 30 V to VDD – + 30 V
Duration of output short circuit at (or below) TA = 25°C (to ± 30 V, see Note 2) . . . . . . . . . . . . . . . . . unlimited
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
NOTES: 1. All voltage values, except differential voltages, are with respect to the GND terminal.
2. The output may be shorted to either supply. Temperature and/or supply voltages must be limited to ensure that the maximum
dissipation rating is not exceeded.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
DW
1025 mW
8.2 mW/°C
656 mW
N
1150 mW
9.2 mW/°C
736 mW
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–3
LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
recommended operating conditions
Supply voltage, VDD +
Supply voltage, VDD –
Supply voltage, VCC
High-level input voltage, VIH (see Note 3)
MIN
NOM
MAX
5
12
15
V
–5
– 12
– 15
V
4.75
5
5.25
V
2
Low-level input voltage, VIL (see Note 3)
Operating free-air temperature, TA
UNIT
V
0.8
V
70
°C
0
NOTE 3: VIH and VIL specifications apply only for inputs D1IN to D3IN.
DRIVER SECTION
electrical characteristics over recommended operating free-air temperature range, VDD± = ±11.4 V
to ±12.6 V, ON/OFF at 2.5 V (unless otherwise noted)
PARAMETER
VOM +
VOM –
IIH
IIL
Maximum positive peak output
voltage swing
Maximum negative peak output
voltage swing
High-level input current
Low-level input current
TEST CONDITIONS
MIN
VDD+ – 0.4
TYP†
V
VDD – + 1.0
VI ≥ 2 V
VI ≤ 0.8 V
1
20
µA
5
20
µA
80
Sinking current,
Supply current
VO = ±18 V,
IO = 0
VI = 0,
VO = 0
VO = 0
POST OFFICE BOX 655303
5
15
–5
– 15
ON/OFF at 0.4 V
ICC(off) Off-state supply current
ON/OFF at 0.4 V
SR
Slew rate
RL = 3 kΩ,
CL = 51 pF
† All typical values are at VDD ± = ±12 V, TA = 25°C.
2–4
VDD – + 1.5
15
Sourcing current,
Off-state output current
UNIT
VDD + – 0.4
Load = 3 kΩ to GND
VI = 0
VI = 5 V
IOZ
ICC
MAX
• DALLAS, TEXAS 75265
4
± 10
± 200
µA
4
8
mA
1
100
µA
15
30
V/µs
LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
RECEIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature, ON/OFF at 2.5 V (unless otherwise noted)
PARAMETER
VT –
VT +
Negative-going input threshold voltage
Vhys
VOL
Hysteresis (VT + – VT –)
VOH
High-level output voltage
TEST CONDITIONS
MIN
TYP†
0.5
1.3
Positive-going input threshold voltage
Low-level output voltage
IOS
Short circuit output current
Short-circuit
IOZ
Off-state (high-impedance state)
output current
0.1
IO = – 1.6 mA
IO = 160 µA
Sinking current,
3.5
Sourcing current,
VO = VCC
VO = 0
VO = 0 to VCC,
VI = 0,
0.5
ON/OFF at 0.4 V
• DALLAS, TEXAS 75265
UNIT
V
1.7
2.8
V
0.4
1
V
0.4
0.5
V
4.8
V
– 10
ICC
Supply current
IO = 0
ICC(off) Off-state supply current
ON/OFF at 0.4 V
† All typical values ground are at VCC = 5 V, TA = 25°C.
POST OFFICE BOX 655303
MAX
mA
1
±1
± 10
µA
4
7
mA
1
100
µA
2–5
LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
2–6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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Copyright  1998, Texas Instruments Incorporated