XR3172EID-F Datasheet, PDF (14/24 Pages) Exar Corporation – 3.3V HIGH SPEED RS-485/RS-422 TRANSCEIVERS WITH 1/8th UNIT LOAD

XR3170E-3178E
3.3V HIGH SPEED RS-485/RS-422 TRANSCEIVERS WITH 1/8^th UNIT LOAD
FIGURE 14. RECEIVER ENABLE AND DISABLE TIMES TEST CIRCUIT
1.5V
S3
-1.5V
A
BR
S1
1kΩ
S2
GENERATOR
RE
50Ω
C_L= 15pF
REV. 1.0.0
Vcc
FIGURE 15. RECEIVER ENABLE AND DISABLE TIMING DIAGRAM 1
S1 is open, S2 is closed, S3 = 1.5V
3V
RE
1.5V
t t ZH, ZH(SHDN)
VOH
OUT
VOH /2
0V
FIGURE 16. RECEIVER ENABLE AND DISABLE TIMING DIAGRAM 2
S1 is closed, S2 is open, S3 = -1.5V
3V
RE
1.5V
0V
t t ZL, ZL(SHDN)
VCC
OUT
VOL= VCC /2
VOL
14