ISL32430E Datasheet, PDF (9/21 Pages) Intersil Corporation – ±40V Fault Protected, 3.3V to 5V, ±15V Common Mode Range, RS-485/RS-422 Transceivers With Cable Invert and ±15kV ESD

ISL32430E, ISL32432E, ISL32433E, ISL32435E, ISL32437E
Electrical Specifications Test Conditions: V_CC = 3V to 3.6V and 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at the worst
case of V_CC = 5V or V_CC = 3.3V, T_A = +25°C (Note 8). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Note 16) TYP (Note 16) UNITS
Receiver Skew |t_PLH - t_PHL|
Receiver Enable to Output Low
t_SKD (Figure 7)
Full
-
t_ZL
R_L = 1kΩ, C_L = 15pF, SW = V_CC (Figure 8),
Full
-
(Note 12)
4
20
ns
-
80
ns
Receiver Enable to Output High
t_ZH
R_L = 1kΩ, C_L = 15pF, SW = GND (Figure 8),
Full
-
(Note 12)
-
80
ns
Receiver Disable from Output Low
t_LZ
R_L = 1kΩ, C_L = 15pF, SW = V_CC (Figure 8)
Full
-
-
80
ns
Receiver Disable from Output High
t_HZ
R_L = 1kΩ, C_L = 15pF, SW = GND (Figure 8)
Full
-
-
80
ns
Time to Shutdown
t_SHDN (Note 13)
Full
60
160
600
ns
Receiver Enable from Shutdown to t_ZH(SHDN) R_L = 1kΩ, C_L = 15pF, SW = GND (Figure 8), Full
-
Output High
(Notes 13, 15)
-
2500
ns
Receiver Enable from Shutdown to t_ZL(SHDN) R_L = 1kΩ, C_L = 15pF, SW = V_CC (Figure 8),
Full
-
Output Low
(Notes 13, 15)
-
2500
ns
NOTES:
8. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise
specified.
9. Supply current specification is valid for loaded drivers when DE = 0V.
10. Applies to peak current. See “Typical Performance Curves” beginning on page 14 for more information.
11. Keep RE = 0 to prevent the device from entering SHDN (does not apply to the ISL32437E).
12. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN.
13. Transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 60ns, the parts are guaranteed not to enter
shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See “Low Power Shutdown Mode” on
page 13.
14. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN.
15. Set the RE signal high time >600ns to ensure that the device enters SHDN.
16. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design.
17. See “Caution” statement below the “Recommended Operating Conditions” section on page 6.
18. Does not apply to the ISL32437E. The ISL32437E has no Rx enable function, and thus no SHDN function.
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
R_L/2
375Ω
V_CM
R_L/2
375Ω
FIGURE 3A. V_OD AND V_OC
FIGURE 3B. V_OD WITH COMMON MODE LOAD
FIGURE 3. DC DRIVER TEST CIRCUITS
9
FN7920.0
March 1, 2012