XR3170E Datasheet, PDF (7/24 Pages) Exar Corporation – 3.3V High Speed RS-485/RS-422 TRANSCEIVERS WITH 1/8 UNIT LOAD

REV. 1.0.0
XR3170E-3178E
3.3V HIGH SPEED RS-485/RS-422 TRANSCEIVERS WITH 1/8^th UNIT LOAD
UNLESS OTHERWISE NOTED: VCC = +3.0V TO +3.6V WITH T_A FROM -40^OC TO +85^OC. TYPICAL VALUES ARE AT
VCC = +3.3V AND 25^OC.
SYMBOL
PARAMETERS
MIN. TYP. MAX. UNITS
CONDITIONS
t_SHDN
Time to Shutdown
50 200 600 ns Notes 3 and 4
XR3173E, XR3174E and XR3175E
DRIVER AC CHARACTERISTICS
freq
Max. Data Signaling Rate
500
kbps 1/t_UI, Duty Cycle 40 to 60%
t_PLH
Driver Propagation Delay (Low to
180
High)
800 ns C_L = 50pF, R_L = 54Ω, Figures 6
and 7
t_PHL
Driver Propagation Delay (High to
180
Low)
800 ns C_L = 50pF, R_L = 54Ω, Figures 6
and 7
t_R
Driver Rise Time
200
800 ns C_L = 50pF, R_L = 54Ω, Figures 6
and 7
t_F
Driver Fall Time
200
800 ns C_L = 50pF, R_L = 54Ω, Figures 6
and 7
|t_PLH-t_PHL| ^{Differential Pulse Skew}
100 ns Figures 6 and 7
t_ZH
Driver Enable to Output High
2500
ns C_L = 50pF, R_L = 500Ω, Figures
8 and 9
t_ZL
Driver Enable to Output Low
2500
ns C_L = 50pF, R_L = 500Ω, Figures
10 and 11
t_HZ
Driver Disable from Output High
150 ns C_L = 50pF, R_L = 500Ω, Figures
8 and 9
t_LZ
Driver Disable from Output Low
150 ns C_L = 50pF, R_L = 500Ω, Figures
10 and 11
t_OZV
Shutdown to Driver Output Valid
3500 ns C_L = 50pF, R_L = 500Ω
t_SHDN
Time to Shutdown
50 200 600 ns Notes 3 and 4
RECEIVER AC CHARACTERISTICS
freq
Data Signaling Rate
500
kbps 1/t_UI, Duty Cycle 40 to 60%
t_PLH
Receiver Propagation Delay (Low to
High)
200 ns V_ID = +/-2V, C_L = 15pF, Figures
12 and 13
t_PHL
Receiver Propagation Delay (High to
Low)
200 ns V_ID = +/-2V, C_L = 15pF, Figures
12 and 13
skew
Receiver Propagation Delay Skew
30
ns V_ID = +/-2V, C_L = 15pF, Figures
12 and 13
skew = |t_PLH-t_PHL|
t_R
Receiver Output Rise Time
3
6
ns C_L = 15pF
t_F
Receiver Output Fall Time
3
6
ns C_L = 15pF
t_ZH
Receiver Enable to Output High
50
ns C_L = 15pF, Figure 14
t_ZL
Receiver Enable to Output Low
50
ns C_L = 15pF, Figure 14
t_HZ
Receiver Disable from Output High
50
ns C_L = 15pF, Figure 14
7