ISL4221E Intersil Corporation, ISL4221E Datasheet - Page 5

• Manufacturer Part Number: ISL4221E
• Description: QFN Packaged, +/-15kV Esd Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/receivers
• Manufacturer: Intersil Corporation

Electrical Specifications
NOTE:
Detailed Description
The ISL422XE operate from a single +2.7V to +5.5V supply,
guarantee a 250kBps minimum data rate, require only four
small external 0.1µF capacitors, feature low power
consumption, and meet all ElA RS-232C and V.28
specifications even with V
into three sections: The charge pump, the transmitters, and
the receivers.
RECEIVER INPUTS
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance
TRANSMITTER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
ESD PERFORMANCE
RS-232 Pins (T
All Other Pins
2. Transmitter skew is measured at the transmitter zero crossing points.
PARAMETER
OUT
, R
IN
)
CC
= 3.0V. The circuit is divided
5
Test Conditions: V
Typicals are at T
V
V
V
V
All Transmitter Outputs Loaded with 3kΩ to Ground
V
V
Automatic Powerdown or FORCEOFF = GND
R
Receiver Input to Receiver
Output, C
Normal Operation
Normal Operation
t
t
V
Measured From 3V to -3V
or -3V to 3V
Human Body Model
IEC61000-4-2 Contact Discharge
IEC61000-4-2 Air Gap Discharge
Human Body Model
PHL
PHL
CC
CC
CC
CC
CC
OUT
L
CC
= 3kΩ, C
= 3.3V
= 5.0V
= 3.3V
= 5.0V
= V+ = V- = 0V, Transmitter Output = ±2V
- t
- t
= 3.3V, R
= ±12V, V
PLH
PLH
L
= 150pF
(Note 2)
L
= 1000pF, One Transmitter Switching
L
A
CC
= 3kΩ to 7kΩ,
CC
= 25
TEST CONDITIONS
= 0V or 3V to 5.5V,
ISL4221E, ISL4223E
= 3V to 5.5V, C
o
C (Continued)
t
t
C
C
PHL
PLH
1
L
L
- C
= 150pF to 2500pF
= 150pF to 1000pF
4
Charge-Pump
Intersil’s new ISL422XE devices utilize regulated on-chip
dual charge pumps as voltage doublers, and voltage
inverters to generate ±5.5V transmitter supplies from a V
supply as low as 3.0V. This allows them to maintain RS-232
compliant output levels over the ±10% tolerance range of
3.3V powered systems. The efficient on-chip power supplies
require only four small, external 0.1µF capacitors for the
voltage doubler and inverter functions. The charge pumps
operate discontinuously (i.e., they turn off as soon as the V+
= 0.1
µ
F; Unless Otherwise Specified.
TEMP
(
Full
Full
Full
Full
Full
o
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
C)
±5.0
MIN
300
250
-25
0.6
0.8
3
4
6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TYP
±5.4
10M
0.15
0.15
±35
500
200
200
100
±15
±15
1.2
1.5
1.5
1.8
0.5
50
±8
±2
5
-
-
-
-
MAX
±60
±25
2.4
2.4
25
30
30
7
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
UNITS
kBps
V/µs
V/µs
mA
kΩ
µA
µs
µs
kV
kV
kV
kV
ns
ns
ns
ns
V
V
V
V
V
V
V
Ω
CC