MAX3221CAE-T Maxim Integrated, MAX3221CAE-T Datasheet

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MAX3221CAE-T

Manufacturer Part Number
MAX3221CAE-T
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX3221, MAX3223, MAX3243r
Datasheet

Specifications of MAX3221CAE-T

Data Rate
120 Kbps
Operating Supply Voltage
3 V to 5.5 V
Supply Current
1 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Function
Transceiver
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Number Of Drivers
1
Number Of I/os
4
Number Of Receivers
1
Propagation Delay Time Ns
0.3 us
Shutdown
Yes

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX3221CAE-T
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX3221/MAX3223/MAX3243 achieve 1µA supply
current with Maxim’s revolutionary AutoShutdown™ fea-
ture. When the MAX3221/MAX3223/MAX3243 do not
sense a valid signal level on their receiver inputs, the
on-board power supply and drivers shut down. This
occurs if the RS-232 cable is disconnected or if the
transmitters of the connected peripheral are turned off.
The system turns on again when a valid level is applied
to any RS-232 receiver input. As a result, the system
saves power without changes to the existing BIOS or
operating system.
The MAX3221/MAX3223/MAX3243 transceivers are 3V-
powered EIA/TIA-232 and V.28/V.24 communications
interfaces intended for notebook computer applica-
tions. A proprietary, high-efficiency, dual charge-pump
power supply and a low-dropout transmitter combine to
deliver true RS-232 performance from a single +3.0V to
+5.5V supply. A guaranteed data rate of 120kbps pro-
vides compatibility with popular software for communi-
cating with personal computers.
The MAX3221/MAX3223/MAX3243 require only 0.1µF
capacitors in 3.3V operation, and can operate from input
voltages ranging from +3.0V to +5.5V. They are ideal for
3.3V-only systems, mixed 3.3V and 5.0V systems, or
5.0V-only systems that require true RS-232 performance.
The MAX3221 is a 1-driver/1-receiver 16-pin SSOP ver-
sion of the 20-pin MAX3223 (2-driver/2-receiver). The
MAX3243 3-driver/5-receiver, complete serial port is
ideal for notebook or subnotebook computers. The
MAX3243 includes one complementary always-active
receiver. This receiver can monitor an external device
(such as a modem) in shutdown, without forward bias-
ing the protection diodes in a UART that may have V
completely removed.
19-0306; Rev 8; 10/03
Pin Configurations appear at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
†Future product—contact factory for availability.
AutoShutdown and UCSP are trademarks of Maxim Integrated
Products, Inc.
* .
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
_____________________Selector Guide
_______________General Description
MAX3221
MAX3223
MAX3243
PART
Tx
1
2
3
RS-232 Transceivers with AutoShutdown
________________________________________________________________ Maxim Integrated Products
Rx
1
2
5
1µA Supply-Current, True +3V to +5.5V
V
CC
3.0 to 5.5
RANGE (V) AutoShutdown
3.0 to 5.5
3.0 to 5.5
Yes
Yes
Yes
CC
________________________Applications
______________Ordering Information
MAX3221CAE
MAX3221CUE†
MAX3221EAE
MAX3221EUE†
MAX3223CPP
MAX3223CAP
MAX3223CUP
MAX3223EPP
MAX3223EAP
MAX3223EUP
MAX3243CWI
MAX3243CAI
MAX3243CUI
MAX3243EWI
MAX3243EAI
MAX3243EUI
Notebook, Subnotebook, and Palmtop Computers
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
Printers
For Space-Constrained Applications:
MAX3228/MAX3229: +2.5V to +5.5V RS-232
Transceivers in UCSP™
For Integrated ESD Protection:
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: ±15kV ESD-Protected, Down to 10nA,
3.0V to 5.5V, Up to 1Mbps, True RS-232
Transceivers (MAX3246E Available in UCSP
Package)
For Low-Voltage or Data Cable Applications:
MAX3380E/MAX3381E: +2.5V to +5.5V, 1µA,
2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-
Protected I/O and Logic Pins
Next Generation Device Features
PART
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
16 SSOP
16 TSSOP
16 SSOP
16 TSSOP
20 Plastic DIP
20 SSOP
20 TSSOP
20 Plastic DIP
20 SSOP
20 TSSOP
28 Wide SO
28 SSOP
28 TSSOP
28 Wide SO
28 SSOP
28 TSSOP
PIN-PACKAGE
1

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MAX3221CAE-T Summary of contents

Page 1

... Tx/2 Rx RS-232 Transceivers with ±15kV ESD- Protected I/O and Logic Pins ________________________Applications Notebook, Subnotebook, and Palmtop Computers Battery-Powered Equipment Hand-Held Equipment Peripherals Printers ______________Ordering Information PART TEMP RANGE MAX3221CAE CC MAX3221CUE† MAX3221EAE -40°C to +85°C MAX3221EUE† -40°C to +85°C MAX3223CPP MAX3223CAP MAX3223CUP MAX3223EPP -40° ...

Page 2

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown ABSOLUTE MAXIMUM RATINGS V ...........................................................................-0. (Note 1) ...............................................................-0.3V to +7V V- (Note 1) ...............................................................+0. (Note 1).................................................................+13V Input Voltages FORCEOFF, ...

Page 3

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2 PARAMETER RECEIVER INPUTS Input Voltage Range Input Threshold Low T A Input Threshold High T ...

Page 4

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown __________________________________________Typical Operating Characteristics (V = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ MAX3221/MAX3223 TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE OUT+ 4 ...

Page 5

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown ______________________________________________________________Pin Description PIN MAX3221 MAX3223 MAX3243 1 1 — 4– 10 12, ...

Page 6

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown POWER FORCEOFF MANAGEMENT FORCEON UNIT OR KEYBOARD INVALID CONTROLLER MAX3243 I/O CHIP CPU WITH UART Figure 1. Interface Under Control of PMU RS-232 Receivers The MAX3221/MAX3223/MAX3243’s receivers convert RS-232 signals ...

Page 7

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown Table 1a. MAX3221/MAX3223 Enable Control Truth Table ...

Page 8

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown Table 2. AutoShutdown Logic RS-232 SIGNAL INPUT PRESENT AT RECEIVER INPUT Yes H No ...

Page 9

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown 5V/div 2V/div 50µs/div V = +3.3V CC C1–C4 = 0.1µF Figure 6. Transmitter Outputs when Exiting Shutdown or Powering Up Power-Supply Decoupling In most circumstances a 0.1µF bypass capacitor is ...

Page 10

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown +3.3V 0.1µ C1+ C1 0.1µF 24 C1- 1 MAX3243 C2+ C2 0.1µF 2 C2- T1IN 14 LOGIC T2IN 13 INPUTS T3IN 12 R2OUTB 20 R1OUT 19 R2OUT ...

Page 11

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown V CC 0.1µ C1+ C1 C1- C2+ MAX3221 MAX3223 C2 C2- MAX3243 OUT OUT EN (MAX3221/3) 5kΩ FORCEOFF CC GND ...

Page 12

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown __________________________________________________Typical Operating Circuits +3.3V 15 0.1µ C1 0.1µF C1- MAX3221 5 C2 0.1µF C2- 11 T1IN 9 R1OUT EN INVALID 10 1 ...

Page 13

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown ______3V-Powered EIA/TIA-232 and EIA/TIA-562 Transceivers from Maxim POWER- No. OF SUPPLY PART TRANSMITTERS/ VOLTAGE RECEIVERS (V) MAX212 3.0 to 3.6 MAX218 1.8 to 4.25 MAX562 2.7 to 5.25 MAX563 3.0 ...

Page 14

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown __________________________________________________________Pin Configurations C1 MAX3221 R1IN 8 SSOP/TSSOP ___________________Chip Information ...

Page 15

Supply-Current, True +3V to +5.5V RS-232 Transceivers with AutoShutdown (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages NOTES: 1. D&E DO NOT ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circu implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Package Information (continued) ...

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