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PDF ISL4223E Data sheet ( Hoja de datos )
| Número de pieza | ISL4223E | |
| Descripción | QFN Packaged/ +/-15kV ESD Protected/ +2.7V to +5.5V/ 150Nanoamp/ 250kBps/ RS-232 Transmitters/Receivers | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Data Sheet
ISL4221E, ISL4223E
April 2003
FN6045
QFN Packaged, +/-15kV ESD Protected,
+2.7V to +5.5V, 150Nanoamp, 250kBps,
RS-232 Transmitters/Receivers
Features
• Available in Near Chip Scale QFN (5mmx5mm) Package
which is 40% Smaller than a 20 Lead TSSOP
The Intersil ISL422XE devices are 2.7V to 5.5V powered
RS-232 transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at VCC = 3.0V. Additionally,
they provide ±15kV ESD protection (IEC61000-4-2 Air Gap,
and Human Body Model) on transmitter outputs and receiver
inputs (RS-232 pins). Targeted applications are PDAs,
Palmtops, and hand-held products where the low
operational, and even lower standby, power consumption is
critical. Efficient on-chip charge pumps, coupled with manual
and automatic powerdown functions, reduce the standby
supply current to a 150nA trickle. Tiny 5mm x 5mm Quad
Flat No-Lead (QFN) packaging and the use of small, low
value capacitors ensure board space savings as well. Data
rates greater than 250kBps are guaranteed at worst case
load conditions.
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• RS-232 Compatible with VCC = 2.7V
• On-Chip Voltage Converters Require Only Four External
0.1µF Capacitors
• Manual and Automatic Powerdown Features
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . 250kBps
• Wide Power Supply Range . . . . . . Single +2.7V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . .150nA
Applications
The ISL4221E is a 1 driver, 1 receiver device and the
ISL4223E is a 2 driver, 2 receiver device that, coupled with
the 5x5 QFN package, provide the industry’s smallest,
lowest power serial port suitable for PDAs, and hand-held
applications. The 5x5 QFN requires 40% less board area
than a 20 lead TSSOP, and is nearly 20% thinner.
• Any Space Constrained System Requiring RS-232 Ports
- Battery Powered, and Portable Equipment
- Hand-Held Products (GPS Receivers, Bar Code
Scanners, etc.)
- PDAs and Palmtops, Data Cables
- Cellular/Mobile Phones, Digital Cameras
The ISL422XE features an automatic powerdown function
that powers down the on-chip power-supply and driver
Related Literature
circuits. This occurs when an attached peripheral device is
shut off or the RS-232 cable is removed, conserving system
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
power automatically without changes to the hardware or
operating system. It powers up again when a valid RS-232
voltage is applied to any receiver input.
Table 1 summarizes the features of the ISL422XE, while
Application Note AN9863 summarizes the features of each
• ”Technical Brief TB379 “Thermal Characterization of
Packages for ICs”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
device comprising the 3V RS-232 family.
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO. OF NO. OF QFN PKG.
Tx. Rx. AVAILABLE?
DATA RATE
(kBps)
Rx. ENABLE
MANUAL
AUTOMATIC POWERDOWN
FUNCTION? POWERDOWN?
FUNCTION?
ISL4221E 1 1
YES
250
YES
YES
YES
ISL4223E 2 2
YES
250
YES
YES
YES
Ordering Information
PART NO.
ISL4221EIR
ISL4221EIR-T
ISL4223EIR
ISL4223EIR-T
TEMP. RANGE
(oC)
PACKAGE
-40 to 85 16 Ld QFN
-40 to 85
16 Ld QFN
Tape & Reel
-40 to 85 20 Ld QFN
-40 to 85
20 Ld QFN
Tape & Reel
PKG. NO.
L16.5x5
L16.5x5
L20.5x5
L20.5x5
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
1 page  
ISL4221E, ISL4223E
Electrical Specifications
TTyepsitcCalosnadrietioantsT: AVC=C25=o3CV
to 5.5V, C1 -
(Continued)
C4
=
0.1µF;
Unless
Otherwise
Specified.
PARAMETER
TEST CONDITIONS
TEMP
(oC)
MIN
TYP
RECEIVER INPUTS
Input Voltage Range
25 -25
-
Input Threshold Low
Input Threshold High
Input Hysteresis
VCC = 3.3V
VCC = 5.0V
VCC = 3.3V
VCC = 5.0V
25 0.6 1.2
25 0.8 1.5
25 -
1.5
25 -
1.8
25 -
0.5
Input Resistance
25 3
5
TRANSMITTER OUTPUTS
Output Voltage Swing
All Transmitter Outputs Loaded with 3kΩ to Ground
Full ±5.0 ±5.4
Output Resistance
Output Short-Circuit Current
VCC = V+ = V- = 0V, Transmitter Output = ±2V
Full 300 10M
Full -
±35
Output Leakage Current
VOUT = ±12V, VCC = 0V or 3V to 5.5V,
Automatic Powerdown or FORCEOFF = GND
Full -
-
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
RL = 3kΩ, CL = 1000pF, One Transmitter Switching
Receiver Input to Receiver
Output, CL = 150pF
tPHL
tPLH
Normal Operation
Full 250
500
25 - 0.15
25 - 0.15
25 - 200
Receiver Output Disable Time Normal Operation
25 - 200
Transmitter Skew
tPHL - tPLH (Note 2)
25 - 100
Receiver Skew
tPHL - tPLH
25 -
50
Transition Region Slew Rate
VCC = 3.3V, RL = 3kΩ to 7kΩ,
Measured From 3V to -3V
or -3V to 3V
CL = 150pF to 2500pF
CL = 150pF to 1000pF
25
25
4
6
-
-
ESD PERFORMANCE
RS-232 Pins (TOUT, RIN)
Human Body Model
IEC61000-4-2 Contact Discharge
25 - ±15
25 -
±8
IEC61000-4-2 Air Gap Discharge
25 - ±15
All Other Pins
Human Body Model
25 -
±2
NOTE:
2. Transmitter skew is measured at the transmitter zero crossing points.
MAX UNITS
25 V
-V
-V
2.4 V
2.4 V
-V
7 kΩ
-V
-Ω
±60 mA
±25 µA
- kBps
- µs
- µs
- ns
- ns
- ns
- ns
30 V/µs
30 V/µs
- kV
- kV
- kV
- kV
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 VCC = 3.0V. The circuit is divided
into three sections: The charge pump, the transmitters, and
the receivers.
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 VCC
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+
5
5 Page 
ISL4221E, ISL4223E
Typical Performance Curves VCC = 3.3V, TA = 25oC
6
VOUT+
4
2
1 TRANSMITTER AT 250kBps
OTHER TRANSMITTERS AT 30kBps
0
-2
-4 VOUT -
-6
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
FIGURE 12. TRANSMITTER OUTPUT VOLTAGE vs LOAD
CAPACITANCE
45
ISL4221E
40
35
250kBps
30
25
20 120kBps
15
10 20kBps
5
0
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
FIGURE 14. SUPPLY CURRENT vs LOAD CAPACITANCE
WHEN TRANSMITTING DATA
3.5
NO LOAD
ALL OUTPUTS STATIC
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE
25
20
15
-SLEW
+SLEW
10
5
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
FIGURE 13. SLEW RATE vs LOAD CAPACITANCE
45
ISL4223E
40
35
30
250kBps
25 120kBps
20
15 20kBps
10
5
0
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
FIGURE 15. SUPPLY CURRENT vs LOAD CAPACITANCE
WHEN TRANSMITTING DATA
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
TRANSISTOR COUNT:
ISL4221E: 286
ISL4223E: 357
PROCESS:
Si Gate CMOS
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ISL4223E.PDF ] | |
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