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What is ADM235L?

This electronic component, produced by the manufacturer "Analog Devices", performs the same function as "CMOS RS-232 Drivers/Receivers".


ADM235L Datasheet PDF - Analog Devices

Part Number ADM235L
Description CMOS RS-232 Drivers/Receivers
Manufacturers Analog Devices　
Logo Analog Devices Logo　


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a
5 V Powered
CMOS RS-232 Drivers/Receivers
ADM223/ADM230L–ADM241L
FEATURES
ADM232L TYPICAL OPERATING CIRCUIT
Single 5 V Power Supply
5V INPUT
Meets All EIA-232-E and V.28 Specifications
120 kB/s Data Rate
On-Board DC-DC Converters
1␮F
6.3V
C1+ +5V TO +10V VCC
VOLTAGE
C1– DOUBLER
V+
1␮F
6.3V
1␮F
6.3V
؎9 V Output Swing with 5 V Supply
Small 1 ␮F Capacitors
Low Power Shutdown ≤1 ␮A
Receivers Active in Shutdown (ADM223)
؎30 V Receiver Input Levels
Latch-Up FREE
Plug-In Upgrade for MAX223/230-241
Plug-In Upgrade for AD230–AD241
OAPPLICATIONS
Computers
BPeripherals
SModems
Printers
OInstruments
LGENERAL DESCRIPTION
EThe ADM2xx family of line drivers/receivers is intended for all
EIA-232-E and V.28 communications interfaces, especially in
TEapplications where ±12 V is not available. The ADM223,
1␮F
16V
TTL/CMOS
INPUTS*
T1IN
T2IN
TTL/CMOS
OUTPUTS
R1OUT
R2OUT
C2+ +10V TO –10V
VOLTAGE
C2– INVERTER
V–
T1
T2
R1
R2
GND ADM232L
1␮F
16V
T1OUT
T2OUT
RS-232
OUTPUTS
R1IN
R2IN
RS-232
INPUTS**
* INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
** INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
All members of the ADM230L family, except the ADM231L
and the ADM239L, include two internal charge pump voltage
converters that allow operation from a single 5 V supply. These
converters convert the 5 V input power to the ± 10 V required
ADM230L, ADM235L, ADM236L and ADM241L feature a
for RS-232 output levels. The ADM231L and ADM239L are
low power shutdown mode that reduces power dissipation to
less than 5 µW, making them ideally suited for battery powered
designed to operate from 5 V and 12 V supplies. An internal
+12 V to –12 V charge pump voltage converter generates the
equipment. Two receivers remain enabled during shutdown on –12 V supply.
the ADM223. The ADM233L and ADM235L do not require
any external components and are particularly useful in applica-
tions where printed circuit board space is critical.
The ADM2xxL is an enhanced upgrade for the AD2xx family
featuring lower power consumption, faster slew rate and opera-
tion with smaller (1 µF) capacitors.
Table I. Selection Table
Part
Number
ADM223
ADM230L
ADM231L
ADM232L
ADM233L
ADM234L
ADM235L
ADM236L
ADM237L
ADM238L
ADM239L
ADM241L
Power
Supply Voltage
5V
5V
5 V and 7.5 V to 13.2 V
5V
5V
5V
5V
5V
5V
5V
5 V and 7.5 V to 13.2 V
5V
No. of
RS-232
Drivers
4
5
2
2
2
4
5
4
5
4
3
4
No. of
RS-232
Receivers
5
0
2
2
2
0
5
3
3
4
5
5
External
Capacitors
4
4
2
4
None
4
None
4
4
4
2
4
Low Power
Shutdown
(SD)
Yes (SD)
Yes
No
No
No
No
Yes
Yes
No
No
No
Yes
TTL
Three-State
EN
Yes (EN)
No
No
No
No
No
Yes
Yes
No
No
Yes
Yes
No. of
Pins
28
20
14
16
20
16
24
24
24
24
24
28
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001

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ADM235L equivalent
ADM223/ADM230L–ADM241L
5V INPUT
1␮F
6.3V
C1+ +5V TO +10V VCC
VOLTAGE
C1– DOUBLER
V+
1␮F
6.3V
1␮F
6.3V
C1+ 1
16 VCC
1␮F
16V
C2+ +10V TO –10V
VOLTAGE
C2– INVERTER
V–
1␮F
16V
V+ 2
15 GND
T1IN
T1
T1OUT
C1– 3
14 T1OUT
TTL/CMOS
INPUTS*
RS-232
OUTPUTS
C2+ 4 ADM232L 13 R1IN
T2IN
T2
T2OUT
TOP VIEW
C2– 5 (Not to Scale) 12 R1OUT
R1OUT
R1 R1IN
V– 6
T2OUT 7
R2IN 8
11 T1IN
10 T2IN
9 R2OUT
OFigure 5. ADM232L DIP/SOIC Pin Configuration
BSOLETET2IN 1
20 R2OUT
TTL/CMOS
OUTPUTS
R2OUT
R2
GND ADM232L
R2IN
RS-232
INPUTS**
* INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
** INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 6. ADM232L Typical Operating Circuit
5V INPUT
TTL/CMOS
INPUTS*
T1IN
T2IN
VCC
T1
T2
T1OUT
T2OUT
RS-232
OUTPUTS
T1IN 2
19 R2IN
R1OUT 3
18 T2OUT
R1IN 4
T1OUT 5
GND 6
ADM233L
TOP VIEW
(Not to Scale)
17 V–
16 C2–
15 C2+
VCC 7
14 V+
C1+ 8
13 C1–
GND 9
12 V–
C2– 10
11 C2+
TTL/CMOS
OUTPUTS
R1OUT
R2OUT
DO NOT MAKE
CONNECTIONS TO
THESE PINS
INTERNAL
–10V POWER
SUPPLY
INTERNAL
+10V POWER
SUPPLY
R1
R2
C1+ C2+
C1–
ADM233L
V–
C2+
C2–
V– C2–
V+ GND GND
R1IN
R2IN
RS-232
INPUTS**
Figure 7. ADM233L DIP Pin Configuration
* INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
** INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 8. ADM233L Typical Operating Circuit
REV. B
–5–


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Featured Datasheets

Part NumberDescriptionMFRS
ADM235LThe function is CMOS RS-232 Drivers/Receivers. Analog DevicesAnalog Devices

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