MAX3238-Q1 Line Driver/Receiver Datasheet

MAX3238-Q1 Datasheet, PDF, Equivalent


Part Number

MAX3238-Q1

Description

3-V to 5.5V Multichannel RS-232 Line Driver/Receiver

Manufacture

etcTI

Total Page 20 Pages
Datasheet
Download MAX3238-Q1 Datasheet


MAX3238-Q1
ą MAX3238ĆQ1
3ĆV TO 5.5ĆV MULTICHANNEL RSĆ232 LINE DRIVER/RECEIVER
WITH ±15ĆkV ESD (HBM) PROTECTION
SLLS569B − MAY 2003 − REVISED APRIL 2008
D Qualified for Automotive Applications
D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D Meets or Exceeds Requirements of
TIA/EIA-232-F and ITU v.28 Standards
D Operates With 3-V to 5.5-V VCC Supply
D Operates Up To 250 kbit/s
D Five Drivers and Three Receivers
D Low Standby Current . . . 1 µA Typical
D External Capacitors . . . 4 × 0.1 µF
D Accepts 5-V Logic Input With 3.3-V Supply
D Always-Active Noninverting Receiver
Output (ROUT1B)
D RS-232 Bus-Pin ESD Protection Exceeds
±15 kV Using Human-Body Model (HBM)
DB OR PW PACKAGE
(TOP VIEW)
C2 +
GND
C2−
V−
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
DOUT5
FORCEON
FORCEOFF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 C1+
27 V+
26 VCC
25 C1−
24 DIN1
23 DIN2
22 DIN3
21 ROUT1
20 ROUT2
19 DIN4
18 ROUT3
17 DIN5
16 ROUT1B
15 INVALID
description/ordering information
The MAX3238 consists of five line drivers, three 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 notebook and subnotebook computer
applications. 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 (ROUT1B), which allows
applications using the ring indicator to transmit data while the device is powered down. These devices operate
at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.
ORDERING INFORMATION{
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 85°C
SSOP (DB) Tape and reel
TSSOP (PW) Tape and reel
MAX3238IDBRQ1
MAX3238IPWRQ1
MAX3238Q
MB3238Q
For the most current package and ordering information, see the Package Option Addendum at
the end of this document, or see the TI web site at http://www.ti.com.
Package drawings, thermal data, and symbolization are available at
http://www.ti.com/packaging.
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.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2008, Texas Instruments Incorporated
1

MAX3238-Q1
MAX3238ĆQ1
3ĆV TO 5.5ĆV MULTICHANNEL RSĆ232 LINE DRIVER/RECEIVER
WITH ±15ĆkV ESD (HBM) PROTECTION
SLLS569B − MAY 2003 − REVISED APRIL 2008
ą
description/ordering information (continued)
Flexible control options for power management are featured when the serial port and driver inputs are inactive.
The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode
of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for
approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to
1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there
is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON
and FORCEOFF are high. With auto-powerdown plus enabled, the device automatically activates once a valid
signal is applied to any receiver or driver 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.
Function Tables
EACH DRIVER
INPUTS
DIN FORCEON FORCEOFF
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
XX
L
X
LH
H
X
HH
H
X
LL
H
<30 s
HL
H
<30 s
LL
H
>30 s
HL
H
>30 s
H = high level, L = low level, X = irrelevant, Z = high impedance
OUTPUT
DOUT
DRIVER STATUS
Z Powered off
H Normal operation with
L auto-powerdown plus disabled
H Normal operation with
L auto-powerdown plus enabled
Z Powered off by auto-powerdown
Z plus feature
EACH RECEIVER
INPUTS
OUTPUTS
RIN1 RIN2−RIN3 FORCEOFF
TIME ELAPSED SINCE LAST RIN
OR DIN TRANSITION
ROUT1B ROUT
RECEIVER STATUS
LX
HX
L
L
X L Z Powered off while
X H Z ROUT1B is active
LL
H
<30 s
LH
LH
HL
HH
H
H
H
<30 s
<30 s
<30 s
L L Normal operation with
H H auto-powerdown plus
H L disabled/enabled
Open Open
H
>30 s
LH
H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features ą MAX3238ĆQ1 3ĆV TO 5.5ĆV MULTICHANN EL RSĆ232 LINE DRIVER/RECEIVER WITH ± 15ĆkV ESD (HBM) PROTECTION SLLS569B MAY 2003 − REVISED APRIL 2008 D Qu alified for Automotive Applications D E SD Protection Exceeds 2000 V Per MIL-ST D-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) D Me ets or Exceeds Requirements of TIA/EIA- 232-F and ITU v.28 Standards D Operates With 3-V to 5.5-V VCC Supply D Operate s Up To 250 kbit/s D Five Drivers and T hree Receivers D Low Standby Current . . . 1 µA Typical D External Capacitors . . . 4 × 0.1 µF D Accepts 5-V Logic Input With 3.3-V Supply D Always-Activ e Noninverting Receiver Output (ROUT1B) D RS-232 Bus-Pin ESD Protection Exceed s ±15 kV Using Human-Body Model (HBM) DB OR PW PACKAGE (TOP VIEW) C2 + GND C2− V− DOUT1 DOUT2 DOUT3 RIN1 RIN2 DOUT4 RIN3 DOUT5 FORCEON FORCEOFF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 C1+ 27 V+ 26 VCC 25 C1− 24 DIN1 23 DIN2 22 DIN3 21 ROUT1 20 ROUT2 19 DIN4 18 ROUT3 17 DIN5 16 ROUT1B 15 INVALID description/or.
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