Harman Kardon HK 990 (serv.man2) Service Manual ▷ View online
General Description
The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communica-
tions interfaces, particularly applications where ±12V is
not available.
intended for all EIA/TIA-232E and V.28/V.24 communica-
tions interfaces, particularly applications where ±12V is
not available.
These parts are especially useful in battery-powered sys-
tems, since their low-power shutdown mode reduces
power dissipation to less than 5µW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for appli-
cations where printed circuit board space is critical.
tems, since their low-power shutdown mode reduces
power dissipation to less than 5µW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for appli-
cations where printed circuit board space is critical.
________________________Applications
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multidrop RS-232 Networks
____________________________Features
Superior to Bipolar
♦ Operate from Single +5V Power Supply
(+5V and +12V—MAX231/MAX239)
♦ Low-Power Receive Mode in Shutdown
(MAX223/MAX242)
♦ Meet All EIA/TIA-232E and V.28 Specifications
♦ Multiple Drivers and Receivers
♦ 3-State Driver and Receiver Outputs
♦ Open-Line Detection (MAX243)
♦ Multiple Drivers and Receivers
♦ 3-State Driver and Receiver Outputs
♦ Open-Line Detection (MAX243)
Ordering Information
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
*Contact factory for dice specifications.
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
________________________________________________________________ Maxim Integrated Products
1
Selection Table
19-4323; Rev 10; 8/01
PART
MAX220CPE
MAX220CSE
MAX220CWE
0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
MAX220C/D
0°C to +70°C
Dice*
MAX220EPE
MAX220ESE
MAX220EWE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
16 Plastic DIP
16 Narrow SO
16 Wide SO
MAX220EJE
-40°C to +85°C
16 CERDIP
MAX220MJE
-55°C to +125°C
16 CERDIP
Power
No. of
Nominal
SHDN
Rx
Part
Supply
RS-232
No. of
Cap. Value & Three- Active in Data Rate
Number
(V)
Drivers/Rx Ext. Caps (µF)
State
SHDN
(kbps)
Features
MAX220
+5
2/2
4
0.1
No
—
120
Ultra-low-power, industry-standard pinout
MAX222
+5
2/2
4 0.1
Yes
—
200
Low-power
shutdown
MAX223 (MAX213) +5
4/5
4
1.0 (0.1)
Yes
✔
120
MAX241 and receivers active in shutdown
MAX225
+5
5/5
0
—
Yes
✔
120
Available in SO
MAX230 (MAX200) +5
5/0
4
1.0 (0.1)
Yes
—
120
5 drivers with shutdown
MAX231 (MAX201) +5 and
2/2
2
1.0 (0.1)
No
—
120
Standard +5/+12V or battery supplies;
+7.5 to +13.2
same functions as MAX232
MAX232 (MAX202) +5
2/2
4
1.0 (0.1)
No
—
120 (64)
Industry standard
MAX232A
+5
2/2
4
0.1
No
—
200
Higher slew rate, small caps
MAX233 (MAX203) +5
2/2
0
—
No
—
120
No external caps
MAX233A
+5
2/2
0
—
No
—
200
No external caps, high slew rate
MAX234 (MAX204) +5
4/0
4
1.0 (0.1)
No
—
120
Replaces 1488
MAX235 (MAX205) +5
5/5
0
—
Yes
—
120
No external caps
MAX236 (MAX206) +5
4/3
4
1.0 (0.1)
Yes
—
120
Shutdown, three state
MAX237 (MAX207) +5
5/3
4
1.0 (0.1)
No
—
120
Complements IBM PC serial port
MAX238 (MAX208) +5
4/4
4
1.0 (0.1)
No
—
120
Replaces 1488 and 1489
MAX239 (MAX209) +5 and
3/5
2
1.0 (0.1)
No
—
120
Standard +5/+12V or battery supplies;
+7.5 to +13.2
single-package solution for IBM PC serial port
MAX240
+5
5/5
4
1.0
Yes
—
120
DIP or flatpack package
MAX241 (MAX211) +5
4/5
4
1.0 (0.1)
Yes
—
120
Complete IBM PC serial port
MAX242
+5
2/2
4
0.1
Yes
✔
200
Separate shutdown and enable
MAX243
+5
2/2
4
0.1
No
—
200
Open-line detection simplifies cabling
MAX244
+5
8/10
4
1.0
No
—
120
High slew rate
MAX245
+5
8/10
0
—
Yes
✔
120
High slew rate, int. caps, two shutdown modes
MAX246
+5
8/10
0
—
Yes
✔
120
High slew rate, int. caps, three shutdown modes
MAX247
+5
8/9
0
—
Yes
✔
120
High slew rate, int. caps, nine operating modes
MAX248
+5
8/8
4
1.0
Yes
✔
120
High slew rate, selective half-chip enables
MAX249
+5
6/10
4
1.0
Yes
✔
120
Available in quad flatpack package
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.
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
59
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
GND
T1
OUT
R1
IN
C2+
C1-
V+
C1+
MAX220
MAX232
MAX232
MAX232A
R1
OUT
T1
IN
T2
IN
R2
OUT
R2
IN
T2
OUT
V-
C2-
DIP/SO
V+
V-
2 +10V
C1+
C1
C2
1
3
4
5
11
10
12
9
6
14
7
13
8
T1
IN
R1
OUT
T2
IN
R2
OUT
T1
OUT
R1I
N
T2
OUT
R2
IN
+5V INPUT
C2+
-10V
C4
RS-232
OUTPUTS
OUTPUTS
RS-232
INPUTS
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
15
5k
5k
400k
400k
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
+5V TO +10V
VOLTAGE DOUBLER
16
C3
C5
CAPACITANCE (
µF)
DEVICE
MAX220
MAX232
MAX232A
MAX220
MAX232
MAX232A
C1
4.7
1.0
0.1
1.0
0.1
C2
4.7
1.0
0.1
1.0
0.1
C3
10
1.0
0.1
0.1
C4
10
1.0
0.1
0.1
C5
4.7
1.0
0.1
1.0
0.1
C2-
C1-
V
CC
5k
DIP/SO
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1
OUT
C1-
V+
C1+
(N.C.) EN
R1
IN
R1
OUT
T1
IN
T2
IN
T2
OUT
V-
C2-
C2+
10
9
R2
OUT
R2
IN
MAX222
MAX242
MAX242
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1
OUT
C1-
V+
C1+
(N.C.) EN
N.C.
R1
IN
R1
OUT
N.C.
T2
OUT
V-
C2-
C2+
12
11
9
10
T1
IN
T2
IN
R2
OUT
R2
IN
MAX222
MAX242
MAX242
SSOP
( ) ARE FOR MAX222 ONLY.
PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.
PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.
V+
V-
3 +10V
C1
C2
2
4
5
6
12
11
13
7
15
8
14
9
T1IN
R1OUT
T2IN
R2OUT
T1OUT
(EXCEPT MAX220)
(EXCEPT MAX220)
R1IN
T2OUT
R2IN
+5V INPUT
C2+
-10V
C4
RS-232
OUTPUTS
OUTPUTS
RS-232
INPUTS
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
16
5k
400k
400k
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
VCC
+5V TO +10V
VOLTAGE DOUBLER
17
C3
C5
1
10
18
SHDN
EN
(N.C.)
ALL CAPACITORS = 0.1
µF
C2-
C1+
C1-
TOP VIEW
Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit
6
0
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
2SC2073
1. BASE
2. COLLECTOR
3. EMITTER
2. COLLECTOR
3. EMITTER
1. EMITTER
2. COLLECTOR
3. BASE
2. COLLECTOR
3. BASE
2SA950
2SC2458
1. EMITTER
2. COLLECTOR
3. BASE
2. COLLECTOR
3. BASE
1. EMITTER
2. COLLECTOR
3. BASE
2. COLLECTOR
3. BASE
2SC2235
2SC1815
1. EMITTER
2. COLLECTOR
3. BASE
2. COLLECTOR
3. BASE
1. EMITTER
2. COLLECTOR
3. BASE
2. COLLECTOR
3. BASE
2SC2120
2SC2406
6
1
Low Cost, General-Purpose
High Speed JFET Amplifier
AD825
Rev. F
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. Trademarks and
registered trademarks are the property of their respective owners.
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. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
FEATURES
High speed
41 MHz, −3 dB bandwidth
125 V/µs slew rate
80 ns settling time
80 ns settling time
Input bias current of 20 pA and noise current of 10 fA/√Hz
Input voltage noise of 12 nV/√Hz
Fully specified power supplies: ±5 V to ±15 V
Input voltage noise of 12 nV/√Hz
Fully specified power supplies: ±5 V to ±15 V
Low distortion: −76 dB at 1 MHz
High output drive capability
High output drive capability
Drives unlimited capacitance load
50 mA min output current
50 mA min output current
No phase reversal when input is at rail
Available in 8-lead SOIC
APPLICATIONS
CCDs
Low distortion filters
Mixed gain stages
Low distortion filters
Mixed gain stages
Audio amplifiers
Photo detector interfaces
Photo detector interfaces
ADC input buffers
DAC output buffers
DAC output buffers
CONNECTION DIAGRAMS
NC = NO CONNECT
AD825
TOP VIEW
(Not to Scale)
NC
1
–IN
2
+IN
3
–V
S
4
NC
8
+V
S
7
OUTPUT
6
NC
5
00876-E
-001
Figure 1. 8-Lead Plastic SOIC (R) Package
NC
1
NC
2
NC
3
–INPUT
4
+INPUT
5
–V
S
6
NC
7
NC
8
NC
10
NC
16
NC
15
NC
14
+V
S
13
OUTPUT
12
NC
11
NC
9
AD825
TOP VIEW
(Not to Scale)
NC = NO CONNECT
00876-E
-002
Figure 2. 16-Lead Plastic SOIC (R-16) Package
GENERAL DESCRIPTION
The AD825 is a superbly optimized operational amplifier for
high speed, low cost, and dc parameters, making it ideally suited
for a broad range of signal conditioning and data acquisition
applications. The ac performance, gain, bandwidth, slew rate,
and drive capability are all very stable over temperature. The
AD825 also maintains stable gain under varying load
conditions.
high speed, low cost, and dc parameters, making it ideally suited
for a broad range of signal conditioning and data acquisition
applications. The ac performance, gain, bandwidth, slew rate,
and drive capability are all very stable over temperature. The
AD825 also maintains stable gain under varying load
conditions.
The unique input stage has ultralow input bias current and
input current noise. Signals that go to either rail on this high
performance input do not cause phase reversals at the output.
These features make the AD825 a good choice as a buffer for
MUX outputs, creating minimal offset and gain errors.
input current noise. Signals that go to either rail on this high
performance input do not cause phase reversals at the output.
These features make the AD825 a good choice as a buffer for
MUX outputs, creating minimal offset and gain errors.
The AD825 is fully specified for operation with dual ±5 V and
±15 V supplies. This power supply flexibility, and the low supply
current of 6.5 mA with excellent ac characteristics under all
supply conditions, makes the AD825 well-suited for many
demanding applications.
±15 V supplies. This power supply flexibility, and the low supply
current of 6.5 mA with excellent ac characteristics under all
supply conditions, makes the AD825 well-suited for many
demanding applications.
00876-E
-003
10V
200ns
10V
Figure 3. Performance with Rail-to-Rail Input Signals
6
2
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