intersil ISL3232E, ISL4223E DATA SHEET

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ISL3232E, ISL4221E, ISL4223E

Data Sheet February 13, 2008

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

The Intersil ISL3232E and ISL4221E, ISL4223E 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 V

= 3.0V. Additionally, they pro vide ±15kV ESD protection

(IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver input s (RS-232 pins). Targeted applications are PDAs, Palmtops, and hand-he ld products where the low operational, and even lower st andby, power consumption is critical. Efficient on-chip charge pumps, coupled with manual and automatic power-down functions, reduce the standby supply current to a 150nA trickle. Tiny 5mmx5mm 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 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, ISL4223E versions feature an automatic power-down 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 IC’s, while Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family.

FN6045.3

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

• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V

• RS-232 Compatible wi th VCC = 2.7V

• On-Chip Voltage Converters Require Only Four External

0.1µF Capacitors

• Manual and Automatic Power-down Features (Except ISL3232E)

• 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 Power-down State . . . . . . . .150nA

• Pb-Free Available (RoHS Compliant)

±15kV (IEC61000)

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 for ICs”

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

TABLE 1. SUMMARY OF FEATURES

NO. OF

PART NUMBER

ISL4221E 1 1 YES 250 YES YES YES ISL3232E 2 2 YES 250 NO NO NO ISL4223E 2 2 YES 250 YES YES YES

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 1-888-468-3774

Rx. ENABLE

FUNCTION?

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

POWER-DOWN?

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

MANUAL

AUTOMATIC POWER-DOWN

FUNCTION?

ISL3232E, ISL4221E, ISL4223E

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Ordering Information

PART

NUMBER

ISL3232EIRZ* (Note) ISL3232 EIRZ -40 to +85 16 Ld QFN (Pb-free) L16.5x5B ISL4221EIR* ISL 4221EIR -40 to +85 16 Ld QFN L16.5x5B ISL4221EIRZ* (Note) ISL4221 EIRZ -40 to +85 16 Ld QFN (Pb-free) L16.5x5B ISL4223EIR* ISL 4223EIR -40 to +85 20 Ld QFN L20.5x5 ISL4223EIRZ* (Note) ISL4223 EIRZ -40 to +85 20 Ld QFN (Pb-free) L20.5x5 *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and 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-020.

PART

MARKING

TEMP.

RANGE (°C) PACKAGE

PKG .

DWG. #

Pinouts

C1-

C2+

C2-

ISL3232E

(16 LD QFN)

TOP VIEW

V+

C1+

VCC

GND

16 14 13

T2IN

T1OUT

R1IN

R1OUT

T1IN

V+

C1-

C2+

C2-

V-

6578

R2IN

T2OUT

R2OUT

ISL4221E

(16 LD QFN)

TOP VIEW

C1+

FORCEOFF

16 14 13

6578

V-

R1IN

R1OUT

VCC

INVALID

GND

T1OUT

FORCEON

T1IN

V+

C1-

C2+

C2-

C1+

20 19 18 17 16

V-

T2OUT

ISL4223E

(20 LD QFN)

TOP VIEW

FORCEOFF

789106

R2IN

R2OUT

VCC

GND

T1OUT

R1IN

R1OUT

FORCEON

T1IN

T2IN

INVALID

FN6045.3

February 13, 2008

ISL3232E, ISL4221E, ISL4223E

www.BDTIC.com/Intersil

Pin Descriptions

PIN FUNCTION

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

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. TIN TTL/CMOS compatible transmitter Inputs.

TOUT ±15kV ESD Protected

RIN ±15kV ESD Protected

ROUT TTL/CMOS level receiver outputs.

INVALID

FORCEOFF

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 T able 2).

FORCEON Active high input to override automatic power-down circuitry thereby keeping transmitters active. (FORCEOFF

Active low receiver enable control.

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

must be high).

Typical Operating Circuits

TTL/CMOS

LOGIC LEVELS

+3.3V

0.1µF

OUT

ISL3232E

0.1µF

C1+

C1-

C2+

C2-

GND

V+

V-

5kΩ

0.1µF

OUT

RS-232 LEVELS

FN6045.3

February 13, 2008

Typical Operating Circuits

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TTL/CMOS

ISL3232E, ISL4221E, ISL4223E

ISL4221E

+3.3V

LOGIC

LEVELS

0.1µF

OUT

0.1µF

16 +

C1+

C1-

C2+

C2-

FORCEON

FORCEOFF

GND

INVALID

V+

V-

5kΩ

0.1µF

OUT

TO POWER CONTROL LOGIC

RS-232 LEVELS

TTL/CMOS

LOGIC LEVELS

+3.3V

0.1µF

OUT

ISL4223E

0.1µF

C1+

C1-

C2+

C2-

FORCEON

FORCEOFF

GND

V+

V-

5kΩ

INVALID

0.1µF

OUT

TO POWER CONTROL LOGIC

RS-232 LEVELS

FN6045.3

February 13, 2008

ISL3232E, ISL4221E, ISL4223E

www.BDTIC.com/Intersil

Absolute Maximum Ratings Thermal Information

VCC to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V

V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V

V- to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +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: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.

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.

2. For θ

, the “case temp” location is the center of the exposed metal pad on the package underside.

Thermal Resistance (Typical)

16 Ld QFN Package (Notes 1, 2). . . . . 35 4.3

20 Ld QFN Package (Notes 1, 2). . . . . 32 4.3

Maximum Junction Temperature (Plastic Package) . . . . . . +150°C

Maximum Storage Temperature Range. . . . . . . . . .-65°C to +150°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

(°C/W) θJC (°C/W)

Operating Conditions

Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Electrical Specifications Test Conditions: V

Typicals are at T

PARAMETER TEST CONDITIONS

DC CHARACTERISTICS

Supply Current, Automatic Power-down All R

Supply Current, Power-down FORCEOFF Supply Current,

Automatic Power-down Disabled

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 AUTOMATIC POWER-DOWN (FORCEON = GND, FORCEOFF Receiver Input Thresholds to Enable

Transmitters Receiver Input Thresholds to Disable

Transmitters INVALID INVALID Receiver Threshold to T r ansmi tters

Enabled Delay (t Receiver Positive or Negative Threshold

to INVALID Receiver Positive or Negative Threshold

to INVALID

Output Voltage Low I Output Voltage High I

)

High Delay (t

Low Delay (t

INVH

INVL

)

(Except ISL3232E)

All Outputs Unloaded, FORCEON = FORCEOFF

, FORCEON, FORCEOFF, EN Full - - 0.8 V

, FORCEON, FORCEOFF, EN VCC = 3.3V Full 2.0 - - V

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

= VCC (Except ISL3232E) Full - ±0.05 ±10 µA

= 1.6mA Full - - 0.4 V

OUT

= -1.0mA Full V

OUT

ISL4221E, ISL4223E Powers Up (See Figure 6) Full -2.7 - 2.7 V

ISL4221E, ISL4223E Powers Down (See Figure 6) Full -0.3 - 0.3 V

= 1.6mA Full - - 0.4 V

OUT

= -1.0mA Full V

OUT

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

= +25°C

Open, FORCEON = GND, FORCEOFF = VCC

= GND (Except ISL3232E) 25 - 0.15 1 µA

VCC = 3.15V 25 - 0.3 1.0 mA

= V

= 5.0V Full 2.4 - - V

= VCC, Except ISL3232E)

TEMP

(°C)

25 - 0.15 1 µA

25 - 100 - µs

25 - 1 - µs

25 - 30 - µs

MIN

(Note 4) TYP

- 0.6 V

- 0.6 - - V

- 0.1 - V

MAX

(Note 4) UNITS

FN6045.3

February 13, 2008

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