D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
19-4323; Rev 15; 1/06
+5V-Powered, Multichannel RS-232
Drivers/Receivers
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.
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.
Next-Generation
Device Features
♦
For Low-Voltage, Integrated ESD Applications
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: +3.0V to +5.5V, Low-Power, Up to
1Mbps, True RS-232 Transceivers Using Four
0.1µF External Capacitors (MAX3246E Available
in a UCSP™ Package)
♦
For Low-Cost Applications
MAX221E: ±15kV ESD-Protected, +5V, 1µA,
Single RS-232 Transceiver with AutoShutdown™
MAX220–MAX249
________________________Applications
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multidrop RS-232 Networks
PART
MAX220CPE
MAX220CSE
MAX220CWE
MAX220C/D
MAX220EPE
MAX220ESE
MAX220EWE
MAX220EJE
MAX220MJE
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
Dice*
16 Plastic DIP
16 Narrow SO
16 Wide SO
16 CERDIP
16 CERDIP
AutoShutdown and UCSP are trademarks of Maxim Integrated
Products, Inc.
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Selection Table
Part
Number
MAX220
MAX222
MAX223 (MAX213)
MAX225
MAX230 (MAX200)
MAX231 (MAX201)
MAX232 (MAX202)
MAX232A
MAX233 (MAX203)
MAX233A
MAX234 (MAX204)
MAX235 (MAX205)
MAX236 (MAX206)
MAX237 (MAX207)
MAX238 (MAX208)
MAX239 (MAX209)
MAX240
MAX241 (MAX211)
MAX242
MAX243
MAX244
MAX245
MAX246
MAX247
MAX248
MAX249
Power
Supply
(V)
+5
+5
+5
+5
+5
+5 and
+7.5 to +13.2
+5
+5
+5
+5
+5
+5
+5
+5
+5
+5 and
+7.5 to +13.2
+5
+5
+5
+5
+5
+5
+5
+5
+5
+5
No. of
RS-232
Drivers/Rx
2/2
2/2
4/5
5/5
5/0
2/2
2/2
2/2
2/2
2/2
4/0
5/5
4/3
5/3
4/4
3/5
5/5
4/5
2/2
2/2
8/10
8/10
8/10
8/9
8/8
6/10
No. of
Ext. Caps
4
4
4
0
4
2
4
4
0
0
4
0
4
4
4
2
4
4
4
4
4
0
0
0
4
4
Nominal
Cap. Value
(µF)
0.047/0.33
0.1
1.0 (0.1)
—
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
0.1
—
—
1.0 (0.1)
—
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
1.0
1.0 (0.1)
0.1
0.1
1.0
—
—
—
1.0
1.0
SHDN
& Three-
State
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Rx
Active in
SHDN
—
—
✔
✔
—
—
—
—
—
—
—
—
—
—
—
—
—
—
✔
—
—
✔
✔
✔
✔
✔
Data Rate
(kbps)
120
200
120
120
120
120
120 (64)
200
120
200
120
120
120
120
120
120
120
120
200
200
120
120
120
120
120
120
Features
Ultra-low-power, industry-standard pinout
Low-power shutdown
MAX241 and receivers active in shutdown
Available in SO
5 drivers with shutdown
Standard +5/+12V or battery supplies;
same functions as MAX232
Industry standard
Higher slew rate, small caps
No external caps
No external caps, high slew rate
Replaces 1488
No external caps
Shutdown, three state
Complements IBM PC serial port
Replaces 1488 and 1489
Standard +5/+12V or battery supplies;
single-package solution for IBM PC serial port
DIP or flatpack package
Complete IBM PC serial port
Separate shutdown and enable
Open-line detection simplifies cabling
High slew rate
High slew rate, int. caps, two shutdown modes
High slew rate, int. caps, three shutdown modes
High slew rate, int. caps, nine operating modes
High slew rate, selective half-chip enables
Available in quad flatpack package
________________________________________________________________
Maxim Integrated Products
1
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.
+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243
Supply Voltage (V
CC
) ...............................................-0.3V to +6V
V+ (Note 1) ..................................................(V
CC
- 0.3V) to +14V
V- (Note 1) .............................................................+0.3V to +14V
Input Voltages
T
IN
..............................................................-0.3V to (V
CC
- 0.3V)
R
IN
(Except MAX220) ........................................................±30V
R
IN
(MAX220).....................................................................±25V
T
OUT
(Except MAX220) (Note 2) .......................................±15V
T
OUT
(MAX220)...............................................................±13.2V
Output Voltages
T
OUT
...................................................................................±15V
R
OUT
.........................................................-0.3V to (V
CC
+ 0.3V)
Driver/Receiver Output Short Circuited to GND.........Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW
20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW
18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW
Operating Temperature Ranges
MAX2_ _AC_ _, MAX2_ _C_ _ .............................0°C to +70°C
MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C
MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) (Note 3) ...................+300°C
Note 1:
For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.
Note 2:
Input voltage measured with T
OUT
in high-impedance state,
SHDN
or V
CC
= 0V.
Note 3:
Maximum reflow temperature for the MAX233A is +225°C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.)
PARAMETER
RS-232 TRANSMITTERS
Output Voltage Swing
Input Logic Threshold Low
Input Logic Threshold High
All devices except MAX220
MAX220: V
CC
= 5.0V
All except MAX220, normal operation
Logic Pullup/lnput Current
SHDN
= 0V, MAX222/MAX242, shutdown,
MAX220
V
CC
= 5.5V,
SHDN
= 0V, V
OUT
= ±15V,
MAX222/MAX242
Output Leakage Current
V
CC
=
SHDN
= 0V
Data Rate
Transmitter Output Resistance
Output Short-Circuit Current
RS-232 RECEIVERS
RS-232 Input Voltage Operating Range
RS-232 Input Threshold Low
RS-232 Input Threshold High
V
CC
= 5V
V
CC
= 5V
MAX220
All except MAX243 R2
IN
MAX243 R2
IN
(Note 4)
All except MAX243 R2
IN
MAX243 R2
IN
(Note 4)
0.8
-3
1.8
-0.5
2.4
-0.1
1.3
±30
±25
V
V
V
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V
OUT
= 0V
V
OUT
= 0V
MAX220
300
±7
V
OUT
= ±15V
MAX220, V
OUT
= ±12V
200
10M
±22
±60
2
2.4
5
±0.01
±0.01
±0.01
40
±1
±10
±10
±25
116
kbps
Ω
mA
µA
µA
All transmitter outputs loaded with 3kΩ to GND
±5
±8
1.4
1.4
0.8
V
V
V
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.)
PARAMETER
CONDITIONS
All except MAX220/MAX243, V
CC
= 5V, no
hysteresis in SHDN
RS-232 Input Hysteresis
MAX220
MAX243
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Leakage Current
EN Input Threshold Low
EN Input Threshold High
Operating Supply Voltage
MAX220
No load
V
CC
Supply Current (SHDN = V
CC
),
Figures 5, 6, 11, 19
MAX222/MAX232A/MAX233A/
MAX242/MAX243
MAX220
3kΩ load both
MAX222/MAX232A/MAX233A/
inputs
MAX242/MAX243
T
A
= +25°C
Shutdown Supply Current
MAX222/
MAX242
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= -55°C to +125°C
SHDN
Input Leakage Current
SHDN
Threshold Low
SHDN
Threshold High
MAX222/MAX242
MAX222/MAX242
MAX222/MAX242
C
L
= 50pF to
MAX222/MAX232A/MAX233/
2500pF, R
L
= 3kΩ MAX242/MAX243
to 7kΩ, V
CC
= 5V,
T
A
= +25°C,
MAX220
measured from
+3V to -3V or -3V
t
PHLT
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation), Figure 1
t
PLHT
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
2.0
6
1.4
1.4
12
30
V/µs
1.5
3
30.0
T
A
= +25°C (MAX220)
I
OUT
= 3.2mA
I
OUT
= 1.6mA (MAX220)
I
OUT
= -1.0mA
Sourcing V
OUT
= GND
Sinking V
OUT
= V
CC
SHDN
= V
CC
or
EN
= V
CC
(SHDN = 0V for
MAX222), 0V
≤
V
OUT
≤
V
CC
MAX242
MAX242
3.5
-2
10
V
CC
- 0.2
-10
30
±0.05
1.4
2.0
4.5
0.5
4
12
15
0.1
2
2
35
10
50
50
100
±1
0.8
µA
V
V
µA
1.4
5.5
2
10
µA
±10
0.8
3
3
MIN
0.2
TYP
0.5
0.3
1
5
5
0.2
7
7
0.4
0.4
kΩ
V
V
mA
µA
V
V
V
MAX
1.0
V
UNITS
Transition Slew Rate
1.3
4
1.5
5
3.5
10
3.5
10
µs
Note 4:
MAX243 R2
OUT
is guaranteed to be low when R2
IN
is
≥
0V or is floating.
_______________________________________________________________________________________
3
+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.)
PARAMETER
t
PHLR
Receiver Propagation Delay RS-232 to
TLL (Normal Operation), Figure 2
t
PLHR
CONDITIONS
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
Receiver Propagation Delay RS-232 to
TLL (Shutdown), Figure 2
Receiver-Output Enable Time, Figure 3
Receiver-Output Disable Time, Figure 3
Transmitter-Output Enable Time (SHDN
Goes High), Figure 4
Transmitter-Output Disable Time (SHDN
Goes Low), Figure 4
t
PHLS
t
PHLS
t
ER
t
DR
t
ET
MAX242
MAX242
MAX242
MAX242
MAX222/MAX242, 0.1µF
caps (includes charge-pump
start-up)
MAX222/MAX242,
0.1µF caps
MAX222/MAX232A/MAX233/
MAX242/MAX243
t
PHLT
- t
PLHT
MAX220
Receiver + to - Propagation Delay
Difference (Normal Operation)
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
2000
100
225
MIN
TYP
0.5
0.6
0.6
0.8
0.5
2.5
125
160
250
MAX
1
3
1
3
10
µs
10
500
500
ns
ns
µs
µs
UNITS
t
DT
600
300
ns
Transmitter + to - Propagation Delay
Difference (Normal Operation)
ns
t
PHLR
- t
PLHR
ns
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX220-01
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
MAX220-02
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
1μF CAPS
V+
V+, V- VOLTAGE (V)
+5V
+5V
0V
0V
1μF CAPS
0.1μF CAPS
V-
-10V
V-
500μs/div
0.1μF CAPS
SHDN
V+
MAX220-03
10
8
6
OUTPUT VOLTAGE (V)
4
2
0
-2
-4
-6
-8
-10
0
5
EITHER V+ OR V- LOADED
V
CC
= ±5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
V- LOADED, NO LOAD ON V+
0.1μF
1μF
11
10
OUTPUT CURRENT (mA)
9
8
7
6
5
ALL CAPS
0.1μF
ALL CAPS
1μF
V
CC
= +5.25V
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
+10V
0.1μF
1μF
V
CC
= +4.75V
V+ LOADED, NO LOAD ON V-
10
15
20
25
LOAD CURRENT (mA)
4
0
10
20
30
40
50
60
DATA RATE (kb/s)
4
_______________________________________________________________________________________
京公网安备 11010802033920号
EEWORLD
