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Part: MAX3243CDWR
Category:
Interface and Interconnect
-> RS-232 (EIA-232)
Description: ti MAX3243, 3-V to 5.5-V Multichannel RS-232 Line Driver/receiver With +/-15kV Esd (HBM) Protection
Company: Texas Instruments, Inc.
Datasheet: Download MAX3243CDWR datasheet File size : 259 kB
Request For quote: Find where to buy MAX3243CDWR
Datasheet text preview:
MAX3243 S 3 V TO 5.5 V MULTICHANNEL RS 232 LINE DRIVER/RECEIVER WITH ±15 kV ESD (HBM) PROTECTION
LLS350I - APRIL 1999 - REVISED SEPTEMBER 2003
D Single-Chip and Single-Supply Interface for D D D D D D D D D D D D D D D
IBM PC/AT Serial Port Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards Operates With 3-V to 5.5-V VCC Supply Three Drivers and Five Receivers Operates Up To 250 kbit/s Designed to Transmit at a Data Rate of 250 kbit/s Low Standby Current . . . 1 µA Typical External Capacitors . . . 4 × 0.1 µF Accepts 5-V Logic Input With 3.3-V Supply Always-Active Noninverting Receiver Output (ROUT2B) Designed to Be Interchangeable With Maxim MAX3243 Alternative High-Speed Pin-Compatible Device (1 Mbit/s) - SNx5C3243 Serial-Mouse Driveability RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM) Auto-Powerdown Feature to Disable Driver Outputs When No Valid RS-232 Signal Is Sensed Applications - Battery-Powered Systems, PDAs, Notebooks, Laptops, Palmtop PCs, and Hand-Held Equipment
DB, DW, OR PW PACKAGE (TOP VIEW)
C2+ C2- V- RIN1 RIN2 RIN3 RIN4 RIN5 DOUT1 DOUT2 DOUT3 DIN3 DIN2 DIN1
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
C1+ V+ VCC GND C1- FORCEON FORCEOFF INVALID ROUT2B ROUT1 ROUT2 ROUT3 ROUT4 ROUT5
description/ordering information
The MAX3243 consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. AT, IBM, and PC are trademarks of International Business Machines Corporation.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
1
MAX3243 S 3 V TO 5.5 V MULTICHANNEL RS 232 LINE DRIVER/RECEIVER WITH ±15 kV ESD (HBM) PROTECTION
LLS350I - APRIL 1999 - REVISED SEPTEMBER 2003
description/ordering information (continued)
Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high and should be done when driving a serial mouse. With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any receiver input voltage is greater than 2.7 V or less than -2.7 V or has been between -0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid data) if all receiver input voltages are between -0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels. ORDERING INFORMATION
TA SOIC (DW) 0°C to 70°C 70 C SSOP (DB) TSSOP (PW) SOIC (DW) -40°C to 85 C 85°C SSOP (DB) TSSOP (PW) PACKAGE Tube of 20 Reel of 1000 Reel of 2000 Tube of 50 Reel of 2000 Tube of 20 Reel of 1000 Reel of 2000 Tube of 50 Reel of 2000 ORDERABLE PART NUMBER MAX3243CDW MAX3243CDWR MAX3243CDBR MAX3243CPW MAX3243CPWR MAX3243IDW MAX3243IDWR MAX3243IDBR MAX3243IPW MAX3243IPWR MB3243I MAX3243I MAX3243I MA3243C MAX3243C MAX3243C TOP-SIDE MARKING
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
Function Tables
EACH DRIVER INPUTS DIN X L H L H L H FORCEON X H H L L L L FORCEOFF L H H H H H H VALID RIN RS-232 LEVEL X X X Yes Yes No No OUTPUT DOUT Z H L H L Z Z DRIVER STATUS Powered off Normal operation with auto-powerdown disabled Normal operation with auto-powerdown enabled Powered off by auto-powerdown feature
H = high level, L = low level, X = irrelevant, Z = high impedance
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
MAX3243 S 3 V TO 5.5 V MULTICHANNEL RS 232 LINE DRIVER/RECEIVER WITH ±15 kV ESD (HBM) PROTECTION
LLS350I - APRIL 1999 - REVISED SEPTEMBER 2003
EACH RECEIVER INPUTS RIN2 L H L L H H Open RIN1, RIN3-RIN5 X X L H L H Open FORCEOFF L L H H H H H VALID RIN RS-232 LEVEL X X Yes Yes Yes Yes No OUTPUTS ROUT2B L H L L H H L ROUT Z Z H L H L H Normal operation with auto-powerdown disabled/enabled RECEIVER STATUS Powered off while ROUT2B is active
H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
logic diagram (positive logic)
DIN1 14 9 DOUT1
DIN2
13
10
DOUT2
DIN3
12
11
DOUT3
FORCEOFF FORCEON
22 23 Auto-powerdown 21 INVALID
ROUT1 ROUT2B
19 20
4 5 kW
RIN1
ROUT2
18
5 5 kW
RIN2
ROUT3
17
6 5 kW
RIN3
ROUT4
16
7 RIN4 5 kW
ROUT5
15
8 5 kW
RIN5
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
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