RS-422(2011) Ver la hoja de datos (PDF) - Exar Corporation
Número de pieza
componentes Descripción
Fabricante
RS-422 Datasheet PDF : 21 Pages
| |||
SP339E
REV. 1.0.0
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
TIMING CHARACTERISTICS (Continued)
UNLESS OTHERWISE NOTED:
VCC = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1µF; TA = TMIN to TMAX. Typical values are at VCC = 3.3V, TA = +25°C.
SYMBOL
PARAMETERS
MIN. TYP. MAX. UNITS
CONDITIONS
RS-485/RS-422, DATA RATE = 250kbps (SLEW = Vcc), ONE TRANSMITTER SWITCHING
Maximum Data Rate
250
kbps RL = 54Ω, CL = 50pF
tRPHL, tRPLH Receiver Propagation Delay
⏐tRPHL-tRPLH⏐ Receiver Propagation Delay Skew
50 150 ns
CL = 15pF, Figure 11
20
ns
tDPHL, tDPLH Driver Propagation Delay
⏐tDPHL-tDPLH⏐ Driver Propagation Delay Skew
tDR, tDF
Driver Rise and Fall Time
500 1000 ns
100
ns RL = 54Ω, CL = 50pF,
Figure 12
300 650 1200 ns
tRZH, tRZL
tRHZ, tRLZ
tDZH, tDZL
tDHZ, tDLZ
Receiver Output Enable Time
Receiver Output Disable Time
Driver Output Enable Time
Driver Output Disable Time
200
200
1000
200
ns
Figure 13
ns
ns
Figure 14
ns
RS-485/RS-422, DATA RATE = 20Mbps (SLEW = 0V), ONE TRANSMITTER SWITCHING
Maximum Data Rate
20
Mbps RL = 54Ω, CL = 50pF
tRPHL, tRPLH Receiver Propagation Delay
⏐tRPHL-tRPLH⏐ Receiver Propagation Delay Skew
50 150 ns
CL = 15pF, Figure 11
10
ns
tDPHL, tDPLH Driver Propagation Delay
⏐tDPHL-tDPLH⏐ Driver Propagation Delay Skew
tDR, tDF
Driver Rise and Fall Time
30 100 ns
10
ns RL = 54Ω, CL = 50pF,
Figure 12
10
20
ns
tRZH, tRZL
tRHZ, tRLZ
tDZH, tDZL
tDHZ, tDLZ
Receiver Output Enable Time
Receiver Output Disable Time
Driver Output Enable Time
Driver Output Disable Time
200 ns
Figure 13
200 ns
200 ns
Figure 14
200 ns
9
Share Link: 