intersil ISL4221E DATA SHEET

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ISL4221E, ISL4223E

Data Sheet August 2004

QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers

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 speci fications, even at V 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.

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.

The ISL422XE features an automatic powerdown function that powers down the on-chip power-supply and driver circuits. This occurs when an attached peripheral device is shut off or the RS-232 cable is removed, conserving system 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 device comprising the 3V RS-232 family.

= 3.0V. Additionally,

FN6045.1

Features

• Available in Near Chip Scale QFN (5mmx5mm) Package which is 40% Smaller than a 20 Lead 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

• 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

• Pb-free Available as an Option

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

• Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices

• ”Technical Brief TB379 “Thermal Characterization of Packages f or ICs”

• Technical Brief TB389 “PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages”

TABLE 1. SUMMARY OF FEATURES

PART

NUMBER

ISL4221E 1 1 YES 250 YES YES YES ISL4223E 2 2 YES 250 YES YES YES

NO. OF

Tx.

NO. OF

Rx.

QFN PKG.

AVAILABLE?

DATA RATE

(kBps)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Rx. ENABLE

FUNCTION?

All other trademarks mentioned are the property of their respective owners.

MANUAL

POWERDOWN?

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

AUTOMATIC POWERDOWN

FUNCTION?

ISL4221E, ISL4223E

Ordering Information

PART NO. TEMP. RANGE (°C) PACKAGE PKG. DWG. #

ISL4221EIR -40 to 85 16 Ld QFN L16.5x5 ISL4221EIR-T -40 to 85 16 Ld QFN

L16.5x5

Tape & Reel

ISL4221EIRZ-T (Note)

-40 to 85 16 Ld QFN Tape & Reel

L16.5x5

(Pb-free)

ISL4223EIR -40 to 85 20 Ld QFN L20.5x5 ISL4223EIRZ

(Note)

-40 to 85 20 Ld QFN (Pb-free)

L20.5x5

Pinouts

ISL4221E (QFN)

TOP VIEW

FORCEOFF

OUT

INVALID

GND

FORCEON

OUT

V+

C1-

C2+

C2-

C1+

16 14 13 1

V-

6578

Ordering Information (Continued)

PART NO. TEMP. RANGE (°C) PACKAGE PKG. DW G . #

ISL4223EIR-T -40 to 85 20 Ld QFN

Tape & Reel

ISL4223EIRZ-T (Note)

-40 to 85 20 Ld QFN Tape & Reel (Pb-free)

NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J Std-020B.

ISL4223E (QFN)

TOP VIEW

C1+

FORCEOFF

VCCGND

20 19 18 17 16

V+

C1-

C2+

C2-

V-

789106

OUT

INVALID

14 13

FORCEON

L20.5x5

OUT

Pin Descriptions

PIN FUNCTION

V+ Internally generated positive transmitter supply (+5.5V).

V- Internally generated negative transmitter supply (-5.5V).

GND Ground connection.

C1+ External capacitor (voltage doubler) is connected to this lead.

C1- External capacitor (voltage doubler) is connected to this lead.

C2+ External capacitor (voltage inverter) is connected to this lead.

C2- External capacitor (voltage inverter) is connected to this lead. T

OUT

INVALID

FORCEOFF

FORCEON Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF

System power supply input (2.7V to 5.5V).

TTL/CMOS compatible transmitter Inputs.

±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs. ±15kV ESD Protected, RS-232 compatible receiver inputs.

TTL/CMOS level receiver outputs. Active low output that indicates if no valid RS-232 levels are present on any receiver input. Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).

Active low receiver enable control.

must be high).

Typical Operating Circuits

ISL4221E, ISL4223E

ISL4221E

TTL/CMOS

LOGIC

LEVELS

TTL/CMOS

LOGIC LEVELS

+3.3V

0.1µF

0.1µF C

0.1µF

OUT

16 +

0.1µF

C1+

C1-

C2+

C2-

FORCEON

0.1µF

C1+

C1-

C2+

C2-

FORCEON

FORCEOFF

GND

ISL4223E

FORCEOFF

GND

5kΩ

INVALID

5kΩ

INVALID

V+

V-

V+

V-

0.1µF

OUT

TO POWER CONTROL LOGIC

0.1µF

OUT

TO POWER CONTROL LOGIC

RS-232 LEVELS

ISL4221E, ISL4223E

Absolute Maximum Ratings Thermal Information

VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V

V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V

V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V

V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V

Input Voltages

, FORCEOFF, FORCEON, EN . . . . . . . . . . . . . . . -0.3V to 6V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V

Output Voltages

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V

OUT

, INVALID. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC +0.3V

OUT

Short Circuit Duration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous

OUT

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

1. θ

Tech Brief TB379, and Tech Brief TB389.

Thermal Resistance (Typical, Note 1)

(oC/W)

16 Ld QFN Package. . . . . . . . . . . . . . . . . . . . . . . . . 35

20 Ld QFN Package. . . . . . . . . . . . . . . . . . . . . . . . . 32

Moisture Sensitivity (see Technical Brief TB363)

QFN Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1

Maximum Junction Temperature (Plastic Package) . . . . . . . 150

Maximum Storage Temperature Range. . . . . . . . . . -65

C to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300

Operating Conditions

Temperature Range

ISL422XEIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40

C to 85oC

Electrical Specifications Test Conditions: V

Typicals are at T

= 3V to 5.5V, C1 - C4 = 0.1µF; Unless Otherwise Specified.

= 25oC

PARAMETER TEST CONDITIONS

DC CHARACTERISTICS

Supply Current, Automatic Powerdown

Supply Current, Powerdown FORCEOFF Supply Current,

Automatic Powerdown Disabled

Open, FORCEON = GND, FORCEOFF = V

All R

= GND 25 - 0.15 1 µA

All Outputs Unloaded, FORCEON = FORCEOFF

= V

LOGIC AND TRANSMITTER INPUTS AND RECEIVER OUTPUTS

Input Logic Threshold Low T Input Logic Threshold High T

Input Leakage Current T Output Leakage Current EN Output Voltage Low I Output Voltage High I

, FORCEON, FORCEOFF, EN Full - - 0.8 V

, FORCEON, FORCEOFF, ENVCC = 3.3V Full 2.0 - - V

, FORCEON, FORCEOFF, EN Full - ±0.01 ±1.0 µA

= V

= 1.6mA Full - - 0.4 V

OUT

= -1.0mA Full V

OUT

AUTOMATIC POWERDOWN (FORCEON = GND, FORCEOFF Receiver Input Thresholds to

ISL422XE Powers Up (See Figure 6) Full -2.7 - 2.7 V

Enable Transmitters Receiver Input Thresholds to

ISL422XE Powers Down (See Figure 6) Full -0.3 - 0.3 V

Disable Transmitters INVALID INVALID

Output Voltage Low I Output Voltage High I

= 1.6mA Full - - 0.4 V

OUT

= -1.0mA Full VCC-0.6 - - V

OUT

Receiver Threshold to Transmitters Enabled Delay (t

)

Receiver Positive or Negative Threshold to INVALID (t

)

INVH

High Delay

Receiver Positive or Negative Threshold to INVALID (t

)

INVL

Low Delay

TEMP

C) MIN TYP MAX UNITS

(

25 - 0.15 1 µA

VCC = 3.15V 25 - 0.3 1.0 mA

= 5.0V Full 2.4 - - V

Full - ±0.05 ±10 µA

-0.6 V

-0.1 - V

= VCC)

25 - 100 - µs

25 - 1 - µs

25 - 30 - µs

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