ISL32483E Datasheet, PDF (7/17 Pages) Intersil Corporation – Fault Protected, Extended CMR, RS-485/RS-422 Transceivers

ISL32483E, ISL32485E
Electrical Specifications Test Conditions: V_CC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V_CC = 5V, T_A = +25°C (Note 6).
Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Note 14) TYP (Note 14) UNITS
Driver Disable from Output
High
t_HZ
SW = GND (Figure 5)
Full
-
-
120
ns
Time to Shutdown
Driver Enable from Shutdown
to Output High
t_SHDN
t_ZH(SHDN)
(Notes 11, 16)
SW = GND (Figure 5),
(Notes 11, 12, 16)
Full
60
160
600
ns
Full
-
-
2000
ns
Driver Enable from Shutdown t_ZL(SHDN) SW = V_CC (Figure 5),
to Output Low
(Notes 11, 12, 16)
Full
-
-
2000
ns
RECEIVER SWITCHING CHARACTERISTICS
Maximum Data Rate
f_MAX -25V ≤ V_CM ≤ 25V (Figure 7)
Full
1
Receiver Input to Output Delay t_PLH, t_PHL -25V ≤ V_CM ≤ 25V (Figure 7)
Full
-
Receiver Skew | t_PLH - t_PHL |
t_SKD
(Figure 7)
Full
-
Receiver Enable to Output
t_ZL
R_L = 1kΩ, C_L = 15pF, SW = V_CC (Figure 8),
Full
-
Low
(Notes 10, 16)
15
-
Mbps
90
150
ns
4
10
ns
-
50
ns
Receiver Enable to Output
t_ZH
R_L = 1kΩ, C_L = 15pF, SW = GND (Figure 8),
Full
-
High
(Notes 10, 16)
-
50
ns
Receiver Disable from Output
t_LZ
R_L = 1kΩ, C_L = 15pF, SW = V_CC (Figure 8)
Full
-
Low
(Note 16)
-
50
ns
Receiver Disable from Output
t_HZ
R_L = 1kΩ, C_L = 15pF, SW = GND (Figure 8)
Full
-
High
(Note 16)
-
50
ns
Time to Shutdown
t_SHDN (Notes 11, 16)
Full
60
160
600
ns
Receiver Enable from
t_ZH(SHDN) R_L = 1kΩ, C_L = 15pF, SW = GND (Figure 8),
Full
-
Shutdown to Output High
(Notes 11, 13, 16)
-
2000
ns
Receiver Enable from
t_ZL(SHDN) R_L = 1kΩ, C_L = 15pF, SW = V_CC (Figure 8),
Full
-
Shutdown to Output Low
(Notes 11, 13, 16)
-
2000
ns
NOTES:
6. 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.
7. Supply current specification is valid for loaded drivers when DE = 0V.
8. Applies to peak current. See “Typical Performance Curves” beginning on page 18 for more information
9. Keep RE = 0 to prevent the device from entering SHDN.
10. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN.
11. Transceivers (except on the ISL32485E) 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 12.
12. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN.
13. Set the RE signal high time >600ns to ensure that the device enters SHDN.
14. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design.
15. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15ms at a 1% duty cycle).
16. Does not apply to the ISL32485E. The ISL32485E has no Rx enable function, and thus no SHDN function.
17. See “Caution” statement in the “Recommended Operating Conditions” section on page 5.
7
FN7785.0
January 18, 2011