ISL3293E Datasheet, PDF (9/17 Pages) Intersil Corporation – ±16.5kV ESD Protected, +125°C, 3.0V to 5.5V, SOT-23/TDFN Packaged, Low Power, RS-485/RS-422 Transmitters

ISL3293E, ISL3294E, ISL3295E, ISL3296E, ISL3297E, ISL3298E
Test Circuits and Waveforms (Continued)
DI
50%
50%
3V OR V_L
0V
DE
V_CC OR V_L
DI
SIGNAL
GENERATOR
Z
D
Y
R_DIFF
CD
OUT (Z)
OUT (Y)
t_DDLH
t_SD1
50%
DIFF OUT (Y - Z)
90%
50%
10%
t_R
t_SD2
50%
V_OH
V_OL
t_DDHL
90%
50%
10%
t_F
+V_OD
-V_OD
t_SSK = |t_SD1(Y) - t_SD2(Y)| OR |t_SD1(Z) - t_SD2(Z)| t_DSK = |t_DDLH - t_DDHL|
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
DI
SIGNAL
GENERATOR
Z
D
Y
500Ω
V_CC
50pF
SW ^GND
PARAMETER OUTPUT
DI
SW
t_HZ
Y/Z
1/0
GND
t_LZ
Y/Z
0/1
V_CC
t_ZH
Y/Z
1/0
GND
t_ZL
Y/Z
0/1
V_CC
DE
t_ZH
OUT (Y, Z)
t_ZL
OUT (Y, Z)
50%
50%
3V OR V_L
0V
t_HZ
OUTPUT HIGH
50%
V_OH - 0.25V ^VOH
0V
t_LZ
50%
OUTPUT LOW
V_CC
V_OL + 0.25V _VOL
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
DE
V_CC OR V_L
DI
SIGNAL
GENERATOR
Z
D
Y
54Ω
C_D
+
V_OD
-
DI
DIFF OUT (Y - Z)
-V_OD
3V OR V_L
0V
+V_{OD 0V}
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER DATA RATE
9
FN6544.0
September 19, 2007