9 FN7639.0 June 17, 2010 Receiver Skew |tPLH
參數(shù)資料
型號: ISL31475EIBZ-T
廠商: Intersil
文件頁數(shù): 21/21頁
文件大?。?/td> 0K
描述: IC TXRX RS485 FAULT PROT 8SOIC
標準包裝: 2,500
類型: 收發(fā)器
驅動器/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)
供應商設備封裝: 8-SOICN
包裝: 帶卷 (TR)
ISL31470E, ISL31472E, ISL31475E, ISL31478E
9
FN7639.0
June 17, 2010
Receiver Skew |tPLH - tPHL|tSKD
(Figure 5)
Full
-
4
10
ns
Receiver Enable to Output Low
tZL
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Note 12)
Full
-
50
ns
Receiver Enable to Output High
tZH
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Note 12)
Full
-
50
ns
Receiver Disable from Output
Low
tLZ
RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6)
Full
-
50
ns
Receiver Disable from Output
High
tHZ
RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6)
Full
-
50
ns
Time to Shutdown
tSHDN
(Note 13)
Full
60
160
600
ns
Receiver Enable from
Shutdown to Output High
tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND
(Figure 6), (Notes 13, 15)
Full
-
2000
ns
Receiver Enable from
Shutdown to Output Low
tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC
(Figure 6), (Notes 13, 15)
Full
-
2000
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.
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
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. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established
by characterization and are not production tested.
17. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15μs at a 1% duty cycle).
18. See “Caution” statement below the “Recommended Operating Conditions” section on page 5.
Test Circuits and Waveforms
FIGURE 1A. VOD AND VOC
FIGURE 1B. VOD AND VOC WITH COMMON MODE LOAD
FIGURE 1. DC DRIVER TEST CIRCUITS
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V,
TA = +25°C (Note 8). Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
(Note 16) TYP
MAX
(Note 16) UNITS
D
DE
DI
VCC
VOD
VOC
RL/2
Z
Y
D
DE
DI
VOD
375Ω
Z
Y
VCM
VCC
RL/2
VOC
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