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Renesas Electronics Components Datasheet

ISL3232E Datasheet

Transmitters/Receivers

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Datasheet
ISL3232E, ISL4221E, ISL4223E
QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps,
RS-232 Transmitters/Receivers
The ISL3232E, ISL4221E, and ISL4223E devices are
2.7V to 5.5V powered RS-232 transmitters/receivers
that meet ElA/TIA-232 and V.28/V.24 specifications,
even at VCC = 3.0V. 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 power consumption and even lower
standby power consumption are critical. Efficient
on-chip charge pumps, coupled with manual and
automatic powerdown functions, reduce the standby
supply current to a 150nA trickle. The 5mmx5mm
Quad Flat No-Lead (QFN) packaging and the use of
small, low value capacitors ensure board space
savings. Data rates greater than 250kbps are ensured
at worst case load conditions.
The ISL4221E is a 1 driver, 1 receiver device and the
ISL3232E and ISL4223E are 2 driver, 2 receiver
devices that, coupled with the 5mmx5mm QFN
package, provide the industry’s smallest, lowest
power serial port suitable for PDAs, and hand-held
applications. The 5mmx5mm QFN requires 40% less
board area than a 20 Ld TSSOP, and is nearly 20%
thinner.
The ISL4221E and ISL4223E versions feature an
automatic powerdown function that powers down the
on-chip power supply and driver circuits. Automatic
powerdown occurs when an attached peripheral
device is shut off or the RS-232 cable is removed, and
conserves system power automatically without
changes to the hardware or operating system. The
ISL4221E and ISL4223E power back up automatically
when a valid RS-232 voltage is applied to any
receiver input.
Table 1 summarizes the features of the IC’s and
AN9863 summarizes the features of each device
comprising the 3V RS-232 family.
Features
• Available in near chip scale QFN (5mmx5mm)
package, which is 40% smaller than a 20 Ld
TSSOP
• 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 (except
ISL3232E)
• Receiver hysteresis for improved noise immunity
• Assured minimum data rate: 250kbps
• Wide power supply range: single +2.7V to +5.5V
• Low supply current in powerdown state: 150nA
• Pb-free (RoHS compliant)
Applications
• 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
Related Literature
For a full list of related documents, visit our website:
ISL3232E, ISL4221E, and ISL4223E device pages
Table 1. Summary of Features
Number Number QFN Pkg.
Part Number of Tx. of Rx. Available?
ISL4221E
11
Yes
ISL3232E
22
Yes
ISL4223E
22
Yes
Rx. Enable
Data Rate (kbps) Function?
250 Yes
250 No
250 Yes
Manual
Powerdown?
Yes
No
Yes
Automatic Powerdown
Function?
Yes
No
Yes
FN6045 Rev.7.00
May.2.19
Page 1 of 24


Renesas Electronics Components Datasheet

ISL3232E Datasheet

Transmitters/Receivers

No Preview Available !

ISL3232E, ISL4221E, ISL4223E
Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. Application Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Charge Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.1 Charge Pump Abs Max Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Low Power Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.5 Powerdown Functionality (Excluding ISL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5.1 Software Controlled (Manual) Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5.2 Automatic Powerdown (Excluding ISL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5.3 INVALID Output (Excluding ISL3232E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6 Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.7 Power Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.8 Transmitter Outputs when Exiting Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.9 Operation Down to 2.7V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.10 High Data Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.11 Interconnection with 3V and 5V Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5. ±15kV ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Human Body Model (HBM) Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 IEC61000-4-2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Air-Gap Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4 Contact Discharge Test Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6. Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8. Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
FN6045 Rev.7.00
May.2.19
Page 2 of 24


Part Number ISL3232E
Description Transmitters/Receivers
Maker Renesas
Total Page 24 Pages
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