Datasheet > ISL4238EIR-T

ISL4238EIR-T

更新时间： 2024-11-23 22:24:35

品牌	Logo	应用领域
英特矽尔 - INTERSIL		驱动器接口集成电路
页数	文件大小	规格书
17页	443K
描述
QFN Packaged, 【15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps/ 1Mbps, RS-232 Transceivers with Enhanced Automatic Powerdown

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ISL4238EIR-T 数据手册

ISL4238E, ISL4244E, ISL4245E

Data Sheet

April 2004

FN8038.3

QFN Packaged, ±15kV ESD Protected,

+2.7V to +5.5V, 10Nanoamp, 250kbps/

1Mbps, RS-232 Transceivers with

Enhanced Automatic Powerdown

Features

• Parameters Fully Specified for 10% Tolerance Supplies

and Full Industrial Temp Range

• Available in Small QFN (5mm x 5mm) Package which is

60% Smaller than a 28 Lead TSSOP

The Intersil ISL4238E/44E/45E 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

• ESD Protection for RS-232 I/O Pins to ±15kV (IEC6100)

• DTE (ISL4244E/45E) and DCE (ISL4238E) Versions

• Lowest Supply Current in Powerdown . . . . . . . . . . . .10nA

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

(IEC6100-4-2 Air Gap and Human Body Model) on

transmitter outputs and receiver inputs (RS-232 pins).

Targeted applications are PDAs, Palmtops, and notebook

and laptop computers where the low operational, and even

lower standby, power consumption is critical. Efficient on-

chip charge pumps, coupled with manual and enhanced

automatic powerdown functions, reduce the standby supply

current to a 10nA 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 (ISL4238E/44E)/1Mbps (ISL4245E)

are guaranteed at worst case load conditions.

• Active Feedback Resistors on T and Logic Inputs

(ISL4238E)

• Flow Through Pinouts

• Manual and Enhanced Automatic Powerdown Features

• Guaranteed Minimum Data Rate

250kbps (ISL4238E/44E) / 1Mbps (ISL4245E)

• Latch-Up Free

• On-Chip Charge Pumps Require Only Four External

0.1µF Capacitors

The ISL424XE are 3 driver, 5 receiver (DTE) devices that,

coupled with the QFN package, provide the industry’s

smallest, lowest power complete serial port suitable for

PDAs, and laptop or notebook computers. The 5x5 QFN

requires 60% less board area than a 28 lead TSSOP, and is

nearly 20% thinner. The devices also include a noninverting

always-active receiver for “wake-up” capability.

• Wide Power Supply Range. . . . . . . Single +2.7V to +5.5V

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

• RS-232 Compatible with V

= 2.7V

• Pb-free Available as an Option

Applications

The ISL4238E is a 5 driver, 3 receiver device optimized for

DCE applications with full hardware handshaking. It also

includes a noninverting always-active receiver for RING

INDICATOR monitoring. Transmitter and logic inputs include

active feedback resistors that retain the input state once

driven to a valid logic level.

• Any Space Constrained System Requiring RS-232 Ports

- Battery Powered, Hand-Held, and Portable Equipment

- Laptop Computers, Notebooks

- PDAs and Palmtops, Data Cables

- Cellular/Mobile Phones, Digital Cameras, GPS

Receivers

These devices feature an enhanced automatic

powerdown function which powers down the on-chip power-

supply and driver circuits. This occurs when all receiver and

transmitter inputs detect no signal transitions for a period of

30sec. These devices power back up, automatically,

whenever they sense a transition on any transmitter or

receiver input.

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 summarizes the features of the ISL4238E/4XE, while

Application Note AN9863 summarizes the features of each

device comprising the 3V RS-232 family.

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.

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

12 3 4 5 6 7...17

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ISL4238EIR-T 替代型号

型号	品牌	替代类型	描述	数据表
ISL4238EIRZ-T	INTERSIL	类似代替	QFN Packaged, 【15kV ESD Protected, +2.7V to +

与ISL4238EIR-T相关器件

型号	品牌	获取价格	描述	数据表
ISL4238EIRZ	INTERSIL	获取价格	QFN Packaged, 【15kV ESD Protected, +2.7V to +
ISL4238EIRZ-T	INTERSIL	获取价格	QFN Packaged, 【15kV ESD Protected, +2.7V to +
ISL4241E	INTERSIL	获取价格	QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitte
ISL4241E	RENESAS	获取价格	QFN Packaged, ±15kV ESD Protected, +2.7V to +
ISL4241EIR	INTERSIL	获取价格	QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitte
ISL4241EIR-T	INTERSIL	获取价格	QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitte
ISL4241EIRZ	INTERSIL	获取价格	QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitte
ISL4241EIRZ-T	INTERSIL	获取价格	QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitte
ISL4243E	INTERSIL	获取价格	QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps, RS-232 Transmitte
ISL4243E	RENESAS	获取价格	QFN Packaged, ±15kV ESD Protected, +2.7V to +

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