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PDF ADM3232E Data sheet ( Hoja de datos )
| Número de pieza | ADM3232E | |
| Descripción | RS-232 Line Driver/Receiver | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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±15 kV ESD Protected, 3.3 V, RS-232
Line Driver/Receiver
ADM3232E
FEATURES
Data rate: 460 kbps
2 Tx and 2 Rx
Meets EIA-232E specifications
0.1 μF charge pump capacitors
ESD protection to IEC 1000-4-2 (801.2) on RS-232 I/Os
Contact discharge: ±8 kV
Air gap discharge: ±15 kV
APPLICATIONS
General-purpose RS-232 data link
Portable instruments
Handsets
Industrial/telecom diagnostic ports
GENERAL DESCRIPTION
The ADM3232E transceiver is a high speed, 2-channel RS-232/V.28
interface device that operates from a single 3.3 V power supply.
Low power consumption makes it ideal for battery-powered
portable instruments. The ADM3232E conforms to the EIA-232E
and ITU-T V.28 specifications and operates at data rates up to
460 kbps.
All RS-232 (TxOUT and RxIN) inputs and outputs are protected
against electrostatic discharges (up to ±15 kV ESD protection).
This ensures compliance with IEC 1000-4-2 requirements.
This device is ideally suited for operation in electrically harsh
environments or where RS-232 cables are frequently plugged/
unplugged, with the ±15 kV ESD protection of the ADM3232E
RS-232 input/output pins.
FUNCTIONAL BLOCK DIAGRAM
+3.3V INPUT
C1
0.1µF
+
10V
C2 +
0.1µF
10V
TTL/CMOS
INPUTS
T1IN
T2IN
ADM3232E
C1+
+3.3V TO +6.6V
VOLTAGE
VCC
C1– DOUBLER V+
C2+ +6.6V TO –6.6V V–
C2–
VOLTAGE
INVERTER
T1
T2
C3
0.1µF
6.3V
C4
0.1µF
10V
C5
0.1µF
T1OUT
T2OUT
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
R1OUT
R2OUT
R1
GND
R2
R1IN
5kΩ RS-232
INPUTS*
R2IN
5kΩ
*INTERNAL 5kΩ PULL-DOWN RESISTOR
ON EACH RS-232 INPUT.
Figure 1.
Emissions are also controlled to within very strict limits. CMOS
technology is used to keep the power dissipation to an absolute
minimum, allowing maximum battery life in portable applications.
Four external 0.1 μF charge pump capacitors are used for the
voltage doubler/inverter, permitting operation from a single
3.3 V supply.
The ADM3232E is available in a 16-lead narrow and wide SOIC
packages, as well as a space-saving 16-lead TSSOP.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2011 Analog Devices, Inc. All rights reserved.
1 page  
ADM3232E
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
C1+ 1
V+ 2
C1– 3
C2+ 4
C2– 5
V– 6
T2OUT
R2IN
7
8
ADM3232E
TOP VIEW
(Not to Scale)
16 VCC
15 GND
14 T1OUT
13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9 R2OUT
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1, 3 C1+, C1– External Capacitor 1 is connected between these pins. A 0.1 μF capacitor is recommended, but larger capacitors
of up to 47 μF can be used.
2 V+
Internally Generated Positive Supply (6 V Nominal).
4, 5 C2+, C2– External Capacitor 2 is connected between these pins. A 0.1 μF capacitor is recommended, but larger capacitors
of up to 47 μF can be used.
6 V–
Internally Generated Negative Supply (−6 V Nominal).
7, 14
T2OUT, T1OUT Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±6 V).
8, 13
R2IN, R1IN
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is connected
on each input.
9, 12
R2OUT, R1OUT Receiver Outputs. These are TTL/CMOS output logic levels.
10, 11
T2IN, T1IN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels.
15 GND Ground Pin. Must be connected to 0 V.
16 VCC
Power Supply Input (3.3 V ± 0.3 V).
Rev. B | Page 5 of 12
5 Page 
NOTES
ADM3232E
Rev. B | Page 11 of 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADM3232E.PDF ] | |
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