ICL3241 Intersil, ICL3241 Datasheet

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ICL3241

Manufacturer Part Number
ICL3241
Description
1 Microamp Supply-Current/ +3V to +5.5V/ 250kbps/ RS-232 Transmitters/Receivers
Manufacturer
Intersil
Datasheet

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1 Microamp Supply-Current, +3V to +5.5V,
250kbps, RS-232 Transmitters/Receivers
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 automatic
powerdown functions (except for the ICL3232), reduce the
standby supply current to a 1 A trickle. Small footprint
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. This
family is fully compatible with 3.3V only systems, mixed 3.3V
and 5.0V systems, and 5.0V only systems.
The ICL324X are 3 driver, 5 receiver devices that provide a
complete serial port suitable for laptop or notebook
computers. Both devices also include noninverting always-
active receivers for “wake-up” capability.
The ICL3221, ICL3223 and ICL3243, feature an automatic
powerdown function which 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. These devices power up
again when a valid RS-232 voltage is applied to any receiver
input.
Table 1 summarizes the features of the devices represented
by this data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL32XX 3V family.
NUMBER
ICL3221
ICL3222
ICL3223
ICL3232
ICL3241
ICL3243
PART
NO. OF
Tx.
1
2
2
2
3
3
NO. OF
TM
Rx.
3-1
1
2
2
2
5
5
CC
1-888-INTERSIL or 321-724-7143
MONITOR Rx.
Data Sheet
= 3.0V. Targeted
(R
NO. OF
OUTB
0
0
0
0
2
1
)
TABLE 1. SUMMARY OF FEATURES
(kbps)
DATA
RATE
250
250
250
250
250
250
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
Intersil and Design is a trademark of Intersil Corporation.
Rx. ENABLE
FUNCTION?
Features
• Drop in Replacements for MAX3221, MAX3222,
• ICL3222 is Low Power, Pin Compatible Upgrade for 5V
• ICL3232 is Low Power Upgrade for HIN232/ICL232 and
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
• Manual and Automatic Powerdown Features (Except
• Guaranteed Mouse Driveability
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate . . . . . . . . . . . . 250kbps
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/ s
• Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State . . . . . . . . . . 1 A
Applications
• Any System Requiring RS-232 Communication Ports
YES
YES
YES
YES
NO
NO
MAX3223, MAX3232, MAX3241, MAX3243, SP3243
MAX242, and SP312A
Pin Compatible Competitor Devices
0.1 F Capacitors
ICL3232)
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Digital Cameras
- Cellular/Mobile Phones
OUTPUT?
May 2000
READY
NO
NO
NO
NO
NO
NO
ICL3221 thru ICL3243
MANUAL
POWER-
DOWN?
YES
YES
YES
YES
YES
NO
|
File Number
Copyright
©
POWERDOWN
Intersil Corporation 2000
AUTOMATIC
FUNCTION?
YES
YES
YES
NO
NO
NO
4805.2

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ICL3241 Summary of contents

Page 1

... Rx. ICL3221 1 1 ICL3222 2 2 ICL3223 2 2 ICL3232 2 2 ICL3241 3 5 ICL3243 3 5 3-1 1-888-INTERSIL or 321-724-7143 Features • Drop in Replacements for MAX3221, MAX3222, MAX3223, MAX3232, MAX3241, MAX3243, SP3243 • ICL3222 is Low Power, Pin Compatible Upgrade for 5V MAX242, and SP312A • ICL3232 is Low Power Upgrade for HIN232/ICL232 and Pin Compatible Competitor Devices • ...

Page 2

... Ld SOIC ICL3232CP PDIP ICL3232CV TSSOP ICL3241CA SSOP ICL3241CB SOIC ICL3241CV TSSOP ICL3243CA SSOP ICL3243CB SOIC ICL3243CV TSSOP NOTE: 1. Most surface mount devices are available on tape and reel; add “ ...

Page 3

... T1 OUT OUT FORCEON OUT INVALID R2 OUT ICL3241 (SOIC, SSOP, TSSOP) TOP VIEW 28 C2+ 1 C1+ C2 GND C1 SHDN ...

Page 4

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 5

Typical Operating Circuits TTL/CMOS LOGIC LEVELS TTL/CMOS LOGIC LEVELS 3-5 ICL3221 thru ICL3243 (Continued) ICL3222 +3. C2 ...

Page 6

Typical Operating Circuits TTL/CMOS LOGIC LEVELS 3-6 ICL3221 thru ICL3243 (Continued) ICL3232 +3. C2 ...

Page 7

... Typical Operating Circuits TTL/CMOS LOGIC LEVELS 3-7 ICL3221 thru ICL3243 (Continued) ICL3241 +3. C2 OUTB 20 R2 OUTB 19 R1 OUT OUT OUT ...

Page 8

Typical Operating Circuits TTL/CMOS LOGIC LEVELS CONTROL LOGIC 3-8 ICL3221 thru ICL3243 (Continued) ICL3243 +3. C2 C2- T ...

Page 9

... Maximum Lead Temperature (Soldering 10s 300 (SOIC, SSOP, TSSOP - Lead Tips Only 5.5V 0.1 F; Unless Otherwise Specified TEST CONDITIONS Open, FORCEON = GND, FORCEOFF = 3.3V, ICL3221- 3.0V, ICL3241 1.6mA = -1.0mA = 1.6mA = -1.0mA TEMP MIN ...

Page 10

... Loaded with 2.5mA Each OUT OUT C = 1000pF, One Transmitter Switching L t PHL = 150pF L t PLH PLH PLH C = 200pF to 2500pF 200pF to 1000pF L ICL3221 - ICL3243 ICL3221 - ICL3243 ICL3221 - ICL3232 ICL3241 - ICL3243 ICL3221 - ICL3243 TEMP MIN TYP MAX UNITS Full - ...

Page 11

... Most devices in the ICL32XX family provide pins that allow the user to force the IC into the low power, standby state. On the ICL3222 and ICL3241, the powerdown control is via a simple shutdown (SHDN) pin. Driving this pin high enables normal operation, while driving it low forces the IC into it’s powerdown state. Connect SHDN to V function isn’ ...

Page 12

... NOTE: 4. Applies only to the ICL3241 and ICL3243. 3-12 ICL3221 thru ICL3243 are floating (but pulled to GND by the internal receiver pull down resistors), the INVALID logic detects the invalid levels and drives the output low. The power management logic then uses this indicator to power down the interface block. ...

Page 13

OUT CC Rx POWERED DOWN UART Tx SHDN = GND GND FIGURE 2. POWER DRAIN THROUGH POWERED DOWN PERIPHERAL V CC TRANSITION DETECTOR TO WAKE-UP LOGIC OUTB ...

Page 14

Devices with the automatic powerdown feature include an INVALID output signal, which switches low to indicate that invalid levels have persisted on all of the receiver inputs for more than 30 s (see Figure 7). INVALID switches high 1 s ...

Page 15

... OUT - ICL3241/ OUT - LOAD CURRENT PER TRANSMITTER (mA) FIGURE 9. TRANSMITTER OUTPUT VOLTAGE vs LOAD CURRENT (PER TRANSMITTER, i.e., DOUBLE CURRENT AXIS FOR TOTAL V High Data Rates The ICL32XX maintain the RS-232 5V minimum transmitter output voltages even at high data rates ...

Page 16

Typical Performance Curves 7.5 5.0 2.5 1 TRANSMITTER AT 235kbps TRANSMITTERS AT 30kbps 0 -2.5 -5.0 -7.5 0 1000 2000 3000 LOAD CAPACITANCE (pF) FIGURE 13. TRANSMITTER OUTPUT VOLTAGE vs LOAD CAPACITANCE 45 ICL3221 - ICL3232 40 ...

Page 17

... Die Characteristics DIE DIMENSIONS: ICL3221/22/23/32: 100 mils x 100 mils (2540 m x 2540 m) ICL3241/43: 100 mils x 127 mils (2550 m x 3230 m) METALLIZATION: Type: Metal 1: AISi(1%) Å Thickness: Metal 1: 8k Type: Metal 2: AISi (1%) Å Thickness: Metal 2: 10k SUBSTRATE POTENTIAL (POWERED UP): GND 3-17 ICL3221 thru ICL3243 ...

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