ICL3245CB Intersil Corporation, ICL3245CB Datasheet

ICL3245CB

Manufacturer Part Number

ICL3245CB

Description

Manufacturer

Intersil Corporation

Datasheet

1.ICL3245CB.pdf (20 pages)

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Company:

Meier Automation Equipment Co., Limited

Part Number:

ICL3245CB

Manufacturer:

HARRIS

Quantity:

20 000

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1 Microamp, +3V to +5.5V, 1Mbps, RS-232

Transceivers with Enhanced Automatic

Powerdown

The Intersil ICL32XX devices are 3.0V to 5.5V powered

RS-232 transmitters/receivers which meet ElA/TIA-232 and

V.28/V.24 specifications, even at V

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 1PA trickle. Small footprint packaging, and the

use of small, low value capacitors ensure board space

savings as well. Data rates greater than 1Mbps are

guaranteed at worst case load conditions. This family is fully

compatible with 3.3V only systems, mixed 3.3V and 5.0V

systems, and 5.0V only systems.

The ICL3245 is a 3 driver, 5 receiver device that provides a

complete serial port suitable for laptop or notebook

computers. It also includes a noninverting always-active

receiver for “wake-up” capability.

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

30s. These devices power back up, automatically, whenever

they sense a transition on any transmitter or receiver input.

Table 1 summarizes the features of the device represented

by this data sheet, while Application Note AN9863

summarizes the features of each device comprising the

ICL32XX 3V family.

NUMBER

ICL3225

ICL3227

ICL3245

PART

NO. OF

Tx.

NO. OF

Rx.

MONITOR Rx.

Data Sheet

= 3.0V. Targeted

NO. OF

OUTB

)

TABLE 1. SUMMARY OF FEATURES

(kbps)

DATA

RATE

1000

1-888-INTERSIL or 321-724-7143

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

Rx. ENABLE

FUNCTION?

Features

•

• Manual and Enhanced Automatic Powerdown Features

• Drop in Replacements for MAX3225, MAX3227,

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

• Latch-Up Free

• On-Chip Voltage Converters Require Only Four External

• Guaranteed Mouse Driveability (ICL3245)

• “Ready to Transmit” Indicator Output (ICL3225, ICL3227)

• Receiver Hysteresis For Improved Noise Immunity

• Guaranteed Minimum Data Rate . . . . . . . . . . . . . . 1Mbps

• Low Skew at Transmitter/Receiver Input Trip Points. . . 10ns

• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . 24V/Ps

• Wide Power Supply Range . . . . . . . Single +3V to +5.5V

• Low Supply Current in Powerdown State. . . . . . . . . . .1PA

Applications

• Any System Requiring RS-232 Communication Ports

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

MAX3245

0.1PF Capacitors

- Battery Powered, Hand-Held, and Portable Equipment

- Laptop Computers, Notebooks, Palmtops

- Modems, Printers and other Peripherals

- Digital Cameras

- Cellular/Mobile Phones

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

15kV ESD Protected (Human Body Model)

ICL3225, ICL3227, ICL3245

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

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

June 2003

OUTPUT?

READY

Yes

MANUAL

POWER-

DOWN?

Yes

POWERDOWN

AUTOMATIC

FUNCTION?

ENHANCED

FN4878.4

Yes

Related parts for ICL3245CB

ICL3245CB Summary of contents

Page 1

Data Sheet 1 Microamp, +3V to +5.5V, 1Mbps, RS-232 Transceivers with Enhanced Automatic Powerdown The Intersil ICL32XX devices are 3.0V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even 3.0V. Targeted CC applications ...

Page 2

... Ld SSOP ICL3225IA - SSOP ICL3225CP PDIP ICL3227CA SSOP ICL3227IA - SSOP ICL3245CA SSOP ICL3245IA - SSOP ICL3245CB SOIC ICL3245IB - SOIC ICL3245CV TSSOP ICL3245IV - TSSOP NOTE: 1. Most surface mount devices are available on tape and reel; add “-T” to suffix. 2 ICL3225, ICL3227, ICL3245 Pinout PKG. ...

Page 3

Pin Descriptions PIN V System power supply input (3.0V to 5.5V 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- ...

Page 4

Typical Operating Circuits +3.3V TTL/CMOS LOGIC LEVELS +3.3V TTL/CMOS LOGIC LEVELS CONTROL LOGIC 4 ICL3225, ICL3227, ICL3245 (Continued) ICL3227 15 + 0.1PF 0.1PF 4 C1 C2+ + 0.1PF V- ...

Page 5

Absolute Maximum Ratings V to Ground -0. ...

Page 6

Electrical Specifications Test Conditions: V Typicals are at T PARAMETER TRANSMITTER OUTPUTS Output Voltage Swing All Transmitter Outputs Loaded with 3k: to Ground Output Resistance V CC Output Short-Circuit Current Output Leakage Current V OUT Automatic Powerdown or FORCEOFF = ...

Page 7

Detailed Description These ICL32XX interface ICs operate from a single +3V to +5.5V supply, guarantee a 1Mbps minimum data rate, require only four small external 0.1PF capacitors, feature low power consumption, and meet all ElA RS-232C and V.28 specifications. The ...

Page 8

RCVR OR XMTR EDGE WITHIN FORCEOFF FORCEON 30s? INPUT INPUT ICL3225, ICL3227 YES H L YES ICL322X - INVALID DRIVING ...

Page 9

FORCEOFF PWR FORCEON MGT LOGIC INVALID I/O UART CPU FIGURE 4. CONNECTIONS FOR MANUAL POWERDOWN WHEN NO VALID RECEIVER SIGNALS ARE PRESENT With any of the above control schemes, the time required to exit powerdown, and resume transmission is only ...

Page 10

RECEIVER INPUTS TRANSMITTER INPUTS TRANSMITTER OUTPUTS t INVH INVALID t INVL OUTPUT READY OUTPUT FIGURE 8. ENHANCED AUTOMATIC POWERDOWN, INVALID AND READY TIMING DIAGRAMS Figure 7 illustrates the enhanced powerdown control logic. Note that once ...

Page 11

Detaching the cable allows the receiver inputs to drop to an invalid level (GND), so INVALID switches low and forces the RS-232 device to power down. The ICL32XX remains powered down until the cable is reconnected ...

Page 12

High Data Rates The ICL32XX maintain the RS-232 5V minimum transmitter r output voltages even at high data rates. Figure 12 details a transmitter loopback test circuit, and Figure 13 illustrates the loopback test result at 250kbps. For this test, ...

Page 13

Typical Performance Curves TRANSMITTER AT 1Mbps OTHER TRANSMITTERS AT 30kbps 1000 2000 3000 LOAD CAPACITANCE (pF) FIGURE 15. TRANSMITTER OUTPUT VOLTAGE vs LOAD CAPACITANCE 90 ICL3225 80 1Mbps ...

Page 14

Typical Performance Curves 90 ICL3245 1000 2000 3000 LOAD CAPACITANCE (pF) FIGURE 19. SUPPLY CURRENT vs LOAD CAPACITANCE WHEN TRANSMITTING DATA Die Characteristics SUBSTRATE POTENTIAL (POWERED UP) GND TRANSISTOR COUNT ICL3225: ...

Page 15

Dual-In-Line Plastic Packages (PDIP INDEX ...

Page 16

Small Outline Plastic Packages (SSOP ...

Page 17

Shrink Small Outline Plastic Packages (SSOP ...

Page 18

Thin Shrink Small Outline Plastic Packages (TSSOP) N INDEX 0.25(0.010) E AREA ...

Page 19

Small Outline Plastic Packages (SOIC ...

Page 20

... Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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