ISL32600E_14 Datasheet, PDF (10/23 Pages) Intersil Corporation – 1.8V to 3.3V, Micro-Power, ±15kV ESD, +125°C, Slew Rate Limited, RS-485/RS-422 Transceivers

ISL32600E, ISL32601E, ISL32602E, ISL32603E
Test Circuits and Waveforms
V_CC ^DE
DI
Z
D
Y
V_OD
R_L/2
R_L/2 VOC
V_CC ^DE
DI
Z
D
Y
V_OD
375Ω
R_L = 60Ω
V_CM
-7V to +12V
375Ω
FIGURE 3A. V_OD AND V_OC
FIGURE 3B. V_OD WITH COMMON MODE LOAD
FIGURE 3. DC DRIVER TEST CIRCUITS
DE
V_CC
DI
Z
D
Y
R_DIFF
C_D
DI
OUT (Z)
OUT (Y)
50%
t_DDLH
50%
t_DDHL
V_CC
0V
V_OH
V_OL
SIGNAL
GENERATOR
DIFF OUT (Y - Z)
90%
10%
t_R
90%
10%
t_F
+V_OD
-V_OD
t_SKEW = |t_DDLH - t_DDHL|
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
SIGNAL
GENERATOR
PARAMETER
t_HZ
t_LZ
t_ZH
t_ZL
t_ZH(SHDN)
t_ZL(SHDN)
DE
DI
Z
D
Y
1kΩ
50pF
V_CC
SW ^GND
DE
NOTE 11
50%
50%
V_CC
0V
OUTPUT
RE
DI
SW
Y/Z
X
1/0
GND
Y/Z
X
0/1
V_CC
Y/Z
0 (Note 9)
1/0
GND
Y/Z
0 (Note 9)
0/1
V_CC
Y/Z
1 (Note 12) 1/0
GND
Y/Z
1 (Note 12) 0/1
V_CC
t_ZH, t_ZH(SHDN)
NOTE 11
OUT (Y, Z)
t_ZL, t_ZL(SHDN)
NOTE 11
OUT (Y, Z)
t_HZ
OUTPUT HIGH
50%
V_OH - 0.25V ^VOH
0V
t_LZ
50%
OUTPUT LOW
V_CC
V_OL + 0.25V _VOL
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. DRIVER ENABLE AND DISABLE TIMES
10
FN7967.0
June 22, 2012