ISL3332 Datasheet, PDF (13/26 Pages) Intersil Corporation – 3.3V, ±15kV ESD Protected, Two Port, Dua Protocol RS-232/RS-485 Transceivers

ISL3332, ISL3333
Test Circuits and Waveforms (Continued)
DEN (QFN ONLY)
V_CC
D_Y,Z
Y, Z
C_L
D
R_L
SIGNAL
GENERATOR
D_Y,Z
1.5V
t_DPHL
OUT (Y,Z)
0V
SKEW = |t_DPHL - t_DPLH|
3V
1.5V
0V
t_DPLH
V_O+
0V
V_O-
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RS-232 DRIVER PROPAGATION DELAY AND TRANSITION TIMES
RXEN (QFN ONLY)
A, B
R_A, R_B
R
SIGNAL
GENERATOR
C_L = 15pF
A, B
50%
t_RPHL
R_A, R_B
SKEW = |t_RPHL - t_RPLH|
50%
3V
50%
0V
t_RPLH
50%
V_OH
V_OL
FIGURE 7A. TEST CIRCUIT
FIGURE 7B. MEASUREMENT POINTS
FIGURE 7. RS-232 RECEIVER PROPAGATION DELAY AND TRANSITION TIMES
13
FN6362.0
May 27, 2008