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PDF LS7273-20 Data sheet ( Hoja de datos )
| Número de pieza | LS7273-20 | |
| Descripción | 30V QUAD-CHANNEL DIFFERENTIAL LINE DRIVER | |
| Fabricantes | LSI | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LS7273-20 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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LS7272 LS7272-20
LS7273 LS7273-20
30 VO LT QUAD-CHANNEL DIFFERENTIAL LINE DRIVER
Nov 2012
PIN ASSIGNMENT – TOP VIEW
FEATURES:
• More feature-rich and cost-effective than the OL7272 and ET7273
• Pin to pin replaceable with the OL7272 and functionally equivalent to the ET7273
• Push-Pull or Open-Drain output drivers (LS7272)
• Open-Drain output drivers only (LS7273)
• Voltage Range: 4.5V – 30V (VDD – VSS)
• 120mA Sink/Source output drive
• Operating frequency up to 4 MHz
• Thermal shutdown protection for output driver overload
• Enable input with Thermal Shutdown disconnect feature
• 1.5A dynamic peak output current drive
• Outputs RS422A compatible
• Inputs CMOS/TTL compatible with hysteresis
• Output drivers fully connected or high-impedance state
PART NUMBER ORDERING INFORMATION:
This part is available in three package styles, DIP, SOIC, and TSSOP.
For DIP packages: LS7272, LS7273, LS7272-20, LS7273-20
For SOIC packages: LS7272-S, LS7273-S, LS7272-S20, LS7273-S20
For TSSOP packages: LS7272-TS, LS7273-TS, LS7272TS20, LS7273TS20
DESCRIPTION:
The LS7272/LS7273 are short-circuit proof Quad Differential Industrial Power Line Drivers. They
can operate up to 30V and have a selectable thermal shutdown features.
The Data inputs are TTL / CMOS compatible and can also be driven up to the supply voltage VDD.
The ENA input can be u sed to place all the outputs in a high impedance state. For the LS7272
the OPD input is used to connect the outputs a s push-pull drivers or open- drain drivers, where
the outputs can be returned through external loads to a maximum voltage of VDD.
For the LS7273, pin4 is LOW and is tied to ground. The outputs are open drain and the loads can
be returned to any voltage between 4.5V and 30V independent of VDD.
An internal 5V regulated supply is used to power the logic and level converter blocks.
The thermal shu tdown block located in the center of the I C can be disabled by setting the ENA
input, Pin 12, to a voltage between 7.5V and 12V.
Upon power-up, a Power-On-Reset (POR) circ uit block forces all output drive rs to the high -
impedance state until the power supply voltage reaches a nominal 3.8V. Includ ed in the POR
circuit block is a hysteresis of 100mV such that if the power sup ply drops below 3.7V all output
drivers are forced to the high-impedance state until the voltage rises above 3.8V. There is a built-
in 5μs delay for disabling the output drivers should the power supply drop below 3.7V. The output
drivers are immediately enabled when the voltage rises above 3.8V.
7272-112912-1
A 1 16 VDD
AO 2
AO 3
15 D
14 DO
OPD 4
13 DO
BO 5
12 ENA
BO 6
11 CO
B7
10 CO
VSS 8
9C
FIGURE 1
A1
AO 2
AO 3
LOW 4
BO 5
BO 6
B7
VSS 8
16 VDD
15 D
14 DO
13 DO
12 ENA
11 CO
10 CO
9C
FIGURE 2
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ELECTRICAL CHARACTERISTICS
(VDD = 12V, TA = 25°C, unless otherwise specified)
Parameter Symbol
Min
Typ Max
Inputs:
Data Input High-Threshold
VDH -
1.7 2.4
Data Input Low Threshold
VDL 0.8
1.2 -
Data Input Hysteresis
VDHY - 0.5 -
ENA / OPD Input High-Threshold
VEH -
1.7 2.4
ENA / OPD Input Low-Threshold
VEL 0.8
1.2 -
ENA / OPD Input Hysteresis
VEHY - 0.5 -
Inputs:
Leakage Current
ILKG -5
+5
ENA I
ESO - 100
OPD, LOW
IDSI -30 -
Outputs:
High-Level Output Voltage
(LS7272 only)
V
VOH
OH
VDD – 0.4
VDD – 0.6
-
Output Resistance
RDSON
- 20 -
Low Voltage Output Voltage
VOL - 0.3 -
V OL - 0.4 -
High-Impedance Output
Leakage Current (Outputs Disabled)
IOT -10
+10
Reset:
Power-On-Reset (POR)
VPOR -
3.6 2.4 V
POR Hysteresis
VPORH
0.1 -
POR Removal Time
TPORR
-5-
Over-Temperature Protection:
Junction Temperature Operate Point
TJTO
165
Junction Temperature Release Point
TJTR -
135
ENA Input Protection Inhibit
VEPI 7.0
12.5
Unit
V
V
V
V
V
V
μA
μA
μA
V
V
Ω
V
V
μA
V
μS
°C
°C
V
Conditions
ENA ≤ 0.8V
ENA ≤ 0.8V
ENA ≤ 0.8V
-
-
-
ENA = 12V
OPD , LOW= 0V
ILOAD = 20mA, VDD = 4.75V
ILOAD = 30mA, VDD = 30V
ILOAD = 30mA
ILOAD = -20mA, VDD = 4.75V
ILOAD = -30mA, VDD = 30V
VDD = 20V, 2.4V < ENA < 7.5V
-
-
-
NOTE: ENA input disables Outputs between 2.4V and 7.5V. ENA input enables Outputs between 7.5V and 12V but
disables Temperature Shutdown. ENA input disables Outputs above 12V.
7272-112912-5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LS7273-20.PDF ] | |
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