ISL4241E Intersil Corporation, ISL4241E Datasheet - Page 11

• Manufacturer Part Number: ISL4241E
• Description: QFN Packaged, +/-15kV Esd Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitters/receivers
• Manufacturer: Intersil Corporation

storage capacitor yields a test that is much more severe than
the HBM test. The extra ESD protection built into this
device’s RS-232 pins allows the design of equipment
meeting level 4 criteria without the need for additional board
level protection on the RS-232 port.
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
Typical Performance Curves
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
TRANSISTOR COUNT:
FIGURE 12. TRANSMITTER OUTPUT VOLTAGE vs LOAD
FIGURE 14. SUPPLY CURRENT vs LOAD CAPACITANCE
GND
ISL424XE: 464
45
40
35
30
25
20
15
10
-2
-4
-6
6
4
2
0
0
0
1 TRANSMITTER AT 250kbps
OTHER TRANSMITTERS AT 30kbps
CAPACITANCE
WHEN TRANSMITTING DATA
1000
1000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
2000
2000
11
3000
3000
250kbps
V
120kbps
CC
20kbps
4000
4000
= 3.3V, T
V
V
OUT
OUT
ISL4241E, ISL4243E
+
-
5000
A
5000
= 25
o
C
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.
PROCESS:
Si Gate CMOS
FIGURE 15. SUPPLY CURRENT vs SUPPLY VOLTAGE
25
20
15
10
3.5
3.0
2.5
2.0
1.5
1.0
0.5
5
FIGURE 13. SLEW RATE vs LOAD CAPACITANCE
0
0
2.5
3.0
1000
+SLEW
3.5
LOAD CAPACITANCE (pF)
SUPPLY VOLTAGE (V)
2000
4.0
-SLEW
4.5
3000
NO LOAD
ALL OUTPUTS STATIC
5.0
4000
5.5
5000
6.0