FN6046.8 February 28, 2006 Receiver Disable from Output Low tLZ C
參數(shù)資料
型號: ISL8490IB
廠商: Intersil
文件頁數(shù): 14/16頁
文件大小: 0K
描述: IC TXRX RS485/422 5V ESD 8-SOIC
標準包裝: 98
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: RS422,RS485
電源電壓: 4.5 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設(shè)備封裝: 8-SOICN
包裝: 管件
7
FN6046.8
February 28, 2006
Receiver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, Figure 5
Full
-
10
50
ns
Maximum Data Rate
fMAX
Note 11
Full
250
-
kbps
Time to Shutdown (ISL8483 only)
tSHDN
Note 7
Full
50
200
600
ns
Driver Enable from Shutdown to
Output High (ISL8483 only)
tZH(SHDN) CL = 100pF, SW = GND, Figure 3, Notes 7, 8
Full
-
2000
ns
Driver Enable from Shutdown to
Output Low (ISL8483 only)
tZL(SHDN) CL = 100pF, SW = VCC, Figure 3, Notes 7, 8
Full
-
2000
ns
Receiver Enable from Shutdown to
Output High (ISL8483 only)
tZH(SHDN) CL = 15pF, SW = GND, Figure 5, Notes 7, 9
Full
-
2500
ns
Receiver Enable from Shutdown to
Output Low (ISL8483 only)
tZL(SHDN) CL = 15pF, SW = VCC, Figure 5, Notes 7, 9
Full
-
2500
ns
NOTES:
2. 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.
3. Supply current specification is valid for loaded drivers when DE = 0V.
4. Applies to peak current. See “Typical Performance Curves” for more information.
5. When testing the ISL8483, keep RE = 0 to prevent the device from entering SHDN.
6. When testing the ISL8483, the RE signal high time must be short enough (typically <200ns) to prevent the device from entering SHDN.
7. The ISL8483 is put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns, 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” section.
8. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN.
9. Set the RE signal high time >600ns to ensure that the device enters SHDN.
10. Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus.
11. Guaranteed by characterization, but not tested.
Test Circuits and Waveforms
FIGURE 1. DRIVER VOD AND VOC
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified.
Typicals are at VCC = 5V, TA = 25°C, Note 2 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
D
DE
DI
VCC
VOD
VOC
R
Z
Y
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
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