ISL3158AE Datasheet, PDF (9/16 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)
RE
0V ^B
A
RO
R
15pF
SIGNAL
GENERATOR
A
0V
+1.5V
0V
-1.5V
t_PLH
t_PHL
V_CC
RO
1.5V
1.5V
0V
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER PROPAGATION DELAY AND DATA RATE
SIGNAL
GENERATOR
RE
GND
B
RO
AR
1kΩ
15pF
V_CC
SW ^GND
PARAMETER
DE
t_HZ
0
t_LZ
0
t_ZH (Note 6)
0
t_ZL (Note 6)
0
t_ZH(SHDN) (Note 9)
0
t_ZL(SHDN) (Note 9)
0
A
+1.5V
-1.5V
+1.5V
-1.5V
+1.5V
-1.5V
SW
GND
V_CC
GND
V_CC
GND
V_CC
NOTE 7
RE
t_ZH, t_ZH(SHDN)
NOTE 7
RO
t_ZL, t_ZL(SHDN)
NOTE 7
RO
1.5V
3V
1.5V
0V
t_HZ
OUTPUT HIGH
1.5V
V_OH - 0.5V ^VOH
0V
t_LZ
1.5V
OUTPUT LOW
V_CC
V_OL + 0.5V _VOL
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
9
FN6886.0
April 3, 2009