LT1039 Datasheet, PDF (3/7 Pages) Texas Instruments – TRIPLE EIA-232 LINE TRANSCEIVER

LT1039
TRIPLE EIA-232 LINE TRANSCEIVER
SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992
Terminal Functions
PIN
NAME
BIAS
D1IN, D2IN, D3IN
D1OUT, D2OUT,
D3OUT
GND
ON/OFF
R1IN, R2IN, R3IN
R1OUT, R2OUT,
R3OUT
VDD ₊
VDD _–
VCC
NO.
2
15, 13,
11
4, 6, 8
DESCRIPTION
Keeps receiver 1 alive while the LT1039 is in the shutdown mode. Leave BIAS open when not in use.
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.
Line driver outputs
10
17
3, 5, 7
16, 14,
12
1
9
18
Ground
Shuts down entire circuit. Cannot be left open. If VIL is at or near 0.8 V, significant settling time may be required.
Receiver inputs. Input impedance is normally 30 kΩ. Accepts EIA-232 voltage levels and has 0.4 V of
hysteresis to provide noise immunity.
Receiver outputs with TTL/CMOS voltage levels
Positive supply voltage for driver
Negative supply voltage for driver
5-V supply voltage for receivers
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V_{DD +} (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 15 V
Supply voltage range, V_{DD –} . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to – 15 V
Supply voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage range, driver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V_{DD –} to 25 V
receiver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30 V
Input voltage range, ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 12 V
Output voltage range, driver output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V_DD+ – 30 V to V_{DD –} + 30 V
Duration of output short circuit at (or below) T_A = 25°C (to ± 30 V, see Note 2) . . . . . . . . . . . . . . . . . unlimited
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
PACKAGE
DW
N
DISSIPATION RATING TABLE
TA ≤ 25°C
POWER RATING
1025 mW
1150 mW
DERATING FACTOR
ABOVE TA = 25°C
8.2 mW/°C
9.2 mW/°C
TA = 70°C
POWER RATING
656 mW
736 mW
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