ISL3158AE Datasheet, PDF (8/16 Pages) Intersil Corporation – ±16.5kV ESD (IEC61000-4-2) Protected, Large Output Swing, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceiver

ISL3158AE
Test Circuits and Waveforms (Continued)
3V
DI
1.5V
1.5V
0V
DE
V_CC
DI
SIGNAL
GENERATOR
Z
D
Y
C_L = 100pF
R_DIFF
C_L = 100pF
OUT (Z)
OUT (Y)
t_PLH
t_PHL
V_OH
V_OL
DIFF OUT (Y - Z)
90%
10%
t_R
90%
10%
t_F
SKEW = |t_PLH - t_PHL|
+V_OD
-V_OD
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
SW ^GND
C_L
PARAMETER OUTPUT
RE
DI
SW C_L (pF)
t_HZ
Y/Z
X
1/0 GND 15
t_LZ
Y/Z
X
0/1 V_CC
15
t_ZH
Y/Z 0 (Note 5) 1/0 GND 100
t_ZL
Y/Z 0 (Note 5) 0/1 V_CC 100
t_ZH(SHDN)
Y/Z 1 (Note 8) 1/0 GND 100
t_ZL(SHDN)
Y/Z 1 (Note 8) 0/1 V_CC 100
DE
NOTE 7
t_ZH, t_ZH(SHDN)
NOTE 7
OUT (Y, Z)
t_ZL, t_ZL(SHDN)
NOTE 7
OUT (Y, Z)
1.5V
3V
1.5V
0V
t_HZ
OUTPUT HIGH
2.3V
V_OH - 0.5V ^VOH
0V
t_LZ
2.3V
OUTPUT LOW
V_CC
V_OL + 0.5V _VOL
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
DE
V_CC
DI
SIGNAL
GENERATOR
Z
D
Y
60Ω
C_D
FIGURE 4A. TEST CIRCUIT
+
3V
DI
V_OD
0V
-
DIFF OUT (Y - Z)
-V_OD
+V_{OD 0V}
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER DATA RATE
8
FN6886.0
April 3, 2009