參數(shù)資料
型號(hào)： ISL4238EIR-T
廠(chǎng)商： INTERSIL CORP
元件分類(lèi)： 通用總線(xiàn)功能
英文描述： 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors
中文描述： TRIPLE LINE TRANSCEIVER, PQCC32
封裝： 5 X 5 MM, PLASTIC, MO-220VHHD-2, QFN-32
文件頁(yè)數(shù)： 15/17頁(yè)
文件大小： 457K
代理商： ISL4238EIR-T
15
AIR-GAP DISCHARGE TEST METHOD
For this test method, a charged probe tip moves toward the
IC pin until the voltage arcs to it. The current waveform
delivered to the IC pin depends on approach speed,
humidity, temperature, etc., so it is difficult to obtain
repeatable results. The “E” device RS-232 pins withstand
±
15kV air-gap discharges.
CONTACT DISCHARGE TEST METHOD
During the contact discharge test, the probe contacts the
tested pin before the probe tip is energized, thereby
eliminating the variables associated with the air-gap
discharge. The result is a more repeatable and predictable
test, but equipment limits prevent testing devices at voltages
higher than
±
8kV. All “E” family devices survive
±
8kV contact
discharges on the RS-232 pins.
Typical Performance Curves
V
CC
= 3.3V, T
A
= 25
o
C
FIGURE 17. ISL4238E TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
FIGURE 18. ISL4244E TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
FIGURE 19. ISL4245E TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
FIGURE 20. ISL4238E SUPPLY CURRENT vs LOAD
CAPACITANCE WHEN TRANSMITTING DATA
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
T
1 TRANSMITTER AT 250kbps
OTHER TRANSMITTERS AT 30kbps
V
OUT
+
V
OUT
-
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
T
1 TRANSMITTER AT 250kbps
OTHER TRANSMITTERS AT 30kbps
V
OUT
+
V
OUT
-
-6
-4
-2
0
2
4
6
1000
2000
3000
4000
5000
0
LOAD CAPACITANCE (pF)
T
1 TRANSMITTER AT 1Mbps
OTHER TRANSMITTERS AT 30kbps
V
OUT
+
V
OUT
-
20
25
30
35
40
55
45
50
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
S
20kbps
250kbps
120kbps
1 TRANSMITTER AT INDICATED RATE
ISL4238E, ISL4244E, ISL4245E
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