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PDF SP26LV431 Data sheet ( Hoja de datos )
| Número de pieza | SP26LV431 | |
| Descripción | HIGH SPEED +3.3V QUAD RS-422 DIFFERENTIAL LINE DRIVER | |
| Fabricantes | Exar | |
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SP26LV431
HIGH SPEED +3.3V QUAD RS-422 DIFFERENTIAL LINE DRIVER
JUNE 2011
REV. 1.1.1
GENERAL DESCRIPTION
The SP26LV431 is a quad differential line driver that
meets the specifications of the EIA standard RS-422
serial protocol. The SP26LV431 features Exar's
BiCMOS process allowing low power operational
characteristics of CMOS technology while meeting all
of the demands of the RS-422 serial protocol over
60Mbps under load. The RS-422 protocol allows up
to 10 receivers to be connected to a multipoint bus
transmission line. The SP26LV431 features a driver
enable control common to all four drivers that places
the output pins in a high impedance state. Since the
cabling can be as long as 4,000 feet, the RS-422
drivers of the SP26LV431 are equipped with a wide
common-mode output voltage range to accommodate
ground potential differences.
FEATURES
• Quad Differential Line Drivers
• Compatible with the EIA standard for RS-422 serial
protocol
• High-Z Output Control
• At Least 60Mbps Transmission Rates
• 11ns Typical Driver Propagation Delays
• Less than 1ns Typical Output Skew
• Single +3.3V Supply Operation
• Common Driver Enable Control
• Compatibility with the industry standard 26LV31
• Ideal For Use with SP26LV432, Quad Receivers
FIGURE 1. TYPICAL APPLICATION CIRCUIT
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com
1 page  
SP26LV431
REV. 1.1.1
HIGH SPEED +3.3V QUAD RS-422 DIFFERENTIAL LINE DRIVER
UNLESS OTHERWISE NOTED: THE FOLLOWING SPECIFICATIONS APPLY FOR VCC = +3.0V TO +3.6V WITH TA =
+25OC AND ALL MIN AND MAX LIMITS APPLY ACROSS THE RECOMMENDED OPERATING TEMPERATURE RANGE.
SYMBOL
IOZ
PARAMETERS
Tri-state Output Leakage Current
ISC Output Short Circuit Current
IOFF Output Leakage Current Power Off
IOFF Output Leakage Current Power Off
Switching Characteristics
tPLHD, tPHLD Propagation Delays
tSKEW
Skew, SP26LV431C_
tSKEW
Skew, SP26LV431E_
tTLH, tTHL Differential Output Rise/Fall Times
tPZH Output Enable Time
tPZL Output Enable Time
tPHZ Output Disable Time
tPLZ Output Disable Time
CPD Power Dissipation Capacitance
CIN Input Capacitance
MIN.
-30
TYP.
±2.0
MAX.
-150
100
-100
UNITS
CONDITIONS
uA VOUT = VCC or GND,
ENABLE = VIL, ENABLE = VIH
mA VIN = VCC or GND, Notes 1 & 3
uA VCC = 0V, VOUT = 6V, Note 1
uA VCC = 0V, VOUT = -0.25V, Note
1
11 18 ns Figure 5
0.8 2 ns Figure 5, Note 4,
3 ns Figure 5, Note 4
4 10 ns Figure 5
40 ns Figure 7
40 ns Figure 7
35 ns Figure 7, Note 5
35 ns Figure 7, Note 5
50 pF Note 6
6 pF
NOTE:
1.
2.
3.
4.
5.
6.
Refer to EIA specifications for RS-422 serial protocol for exact test conditions.
Measured per input. All other inputs at VCC or GND.
This is the current sourced when a high output is shorted to GND. Only one output at a time should be shorted.
Skew is defined as the difference in propagation delays between complementary outputs at the 50% input.
Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off.
The actual disable times are less than indicated due to the delay added by the RC time constant of the load.
CPD determines the no load dynamic power consumption, PD = (CPDVCC2f) + (ICCVCC), and the no load dynamic
power consumption, IS = (CPDVCCf) + ICC.
5
5 Page 
REV. 1.1.1
SP26LV431
HIGH SPEED +3.3V QUAD RS-422 DIFFERENTIAL LINE DRIVER
FIGURE 12. DIFFERENTIAL SKEW VS TEMPERATURE
FIGURE 13. DIFFERENTIAL SKEW VS VOLTAGE
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet SP26LV431.PDF ] | |
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