10
FN6202.3
November 21, 2007
Driver Maximum Data Rate
fMAX
RDIFF = 54Ω, CL = 100pF (Figure 2) Full
-
2000
-
kbps
RS-485 DRIVER SWITCHING CHARACTERISTICS (SLOW DATA RATE (115kbps, QFN ONLY), SEL = VCC, SPA = GND, SPB = VCC)
Driver Differential Input to Output
Delay
tDLH,
tDHL
RDIFF = 54Ω, CL = 100pF (Figure 2) Full
800
1500
2500
ns
Driver Output Skew
tSKEW
RDIFF = 54Ω, CL = 100pF (Figure 2) Full
-
350
1250
ns
Driver Differential Rise or Fall Time
tR, tF
RDIFF = 54Ω, CL = 100pF (Figure 2) Full
1000
2000
3100
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC (Figure 3) Full
-
32
600
ns
Driver Enable to Output High
tZH
CL = 100pF, SW = GND (Figure 3) Full
-
300
600
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC (Figure 3) Full
-
31
60
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND (Figure 3) Full
-
24
60
ns
Driver Enable from Shutdown to
Output Low
tZL(SHDN) RL = 500Ω, CL = 100pF, SW = VCC (Figure 3) Full
-
65
800
ns
Driver Enable from Shutdown to
Output High
tZH(SHDN) RL = 500Ω, CL = 100pF, SW = GND (Figure 3) Full
-
420
800
ns
Driver Maximum Data Rate
fMAX
RDIFF = 54Ω, CL = 100pF (Figure 2) Full
-
800
-
kbps
RS-485 RECEIVER SWITCHING CHARACTERISTICS (SEL = VCC, ALL VERSIONS AND SPEEDS)
Receiver Input to Output Delay
Full
20
50
90
ns
Receiver Skew | tPLH - tPHL |tSKEW
Full
-
0.1
10
ns
Receiver Maximum Data Rate
fMAX
Full
-
40
-
Mbps
RECEIVER ENABLE/DISABLE CHARACTERISTICS (ALL MODES AND SPEEDS)
Receiver Enable to Output Low
tZL
QFN Only, CL = 15pF, SW = VCC (Figure 5) Full
-
22
60
ns
Receiver Enable to Output High
tZH
QFN Only, CL = 15pF, SW = GND (Figure 5) Full
-
23
60
ns
Receiver Disable from Output Low
tLZ
QFN Only, CL = 15pF, SW = VCC (Figure 5) Full
-
24
60
ns
Receiver Disable from Output High
tHZ
QFN Only, CL = 15pF, SW = GND (Figure 5) Full
-
25
60
ns
Receiver Enable from Shutdown to
Output Low
tZLSHDN CL = 15pF, SW = VCC (Figure 5) RS-485 Mode
Full
-
260
700
ns
RS-232 Mode
25
-
35
-
ns
Receiver Enable from Shutdown to
Output High
tZHSHDN CL = 15pF, SW = GND (Figure 5) RS-485 Mode Full
-
260
700
ns
RS-232 Mode
25
-
25
-
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 (RS-485 mode only).
8. Applies to peak current. See “Typical Performance Curves” starting on
page 19 for more information.
9. RIN defaults to RS-485 mode (>15kΩ) when the device is unpowered (VCC = 0V), or in SHDN, regardless of the state of the SEL inputs.
10. VCC ≤ 5.25V.
11. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V, C1 - C4 = 0.1F, VL = VCC (for QFN only); Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = +25°C (Note 6). (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
(Note 11)
TYP
MAX
(Note 11) UNITS
ISL81334, ISL41334