MAX2_ _C_ _ .....................................................0°C to +70°C
MAX2_ _E_ _ ................................................. -40°C to +85°C
MAX2_ _ M_ _.............................................. -55°C to +125°C
Storage Temperature Range ............................ -65°C to +160°C
Lead Temperature (soldering, 10s) (Note 1) ................... +300°C
Note 1:
Maximum reflow temperature for the MAX203 and MAX205 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
(MAX202/MAX204/MAX206/MAX208/MAX211/MAX213: V
CC
= +5V ±10%; MAX200/MAX203/MAX205/MAX207: V
CC
= +5V ±5%,
C1–C4 = 0.1µF; MAX201/MAX209: V
CC
= +5V ±10%, V+ = +9.0V to +13.2V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
Output-Voltage Swing
V
CC
Power-Supply
Current
CONDITIONS
All transmitter outputs loaded with 3kΩ to ground
MAX202, MAX203
No load, T
A
= +25°C
MAX200, MAX204–MAX208, MAX211,
MAX213
MAX201, MAX209
V+ Power-Supply Current
Shutdown Supply Current
Input Logic Threshold Low
Input Logic Threshold High
Logic Pullup Current
RS-232 Input-Voltage
Operating Range
No load
Figure 1, T
A
= +25°C
MAX201
MAX209
MAX200, MAX205, MAX206, MAX211
MAX213
MIN
±5
TYP
±8
8
11
0.4
5
7
1
15
15
20
1
10
15
10
50
0.8
2.0
2.4
15
-30
200
+30
mA
µA
V
V
µA
V
mA
MAX
UNITS
V
T
IN
,
EN,
SHDN, EN,
SHDN
T
IN
EN,
SHDN, EN,
SHDN
T
IN
= 0V
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Maxim Integrated
│
2
MAX200–MAX209/
MAX211/MAX213
Electrical Characteristics (continued)
+5V, RS-232 Transceivers
with 0.1μF External Capacitors
(MAX202/MAX204/MAX206/MAX208/MAX211/MAX213: V
CC
= +5V ±10%; MAX200/MAX203/MAX205/MAX207: V
CC
= +5V ±5%,
C1–C4 = 0.1µF; MAX201/MAX209: V
CC
= +5V ±10%, V+ = +9.0V to +13.2V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
Receiver Input Threshold
Low
Receiver Input Threshold
High
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output-Voltage
Low
TTL/CMOS Output-Voltage
High
TTL/CMOS Output
Leakage Current
Output Enable Time
Output Disable Time
Receiver Propagation
Delay
Transmitter Output
Resistance
Transition Region Slew
Rate
RS-232 Output Short-
Circuit Current
Maximum Data Rate
R
L
= 3kΩ to 7kΩ, C
L
= 50pF to 1000pF, one transmitter
120
V
CC
= +5V,
T
A
= +25°C
V
CC
= +5V,
T
A
= +25°C
V
CC
= +5V, T
A
= +25°C
I
OUT
= 3.2mA
I
OUT
= 1.6mA
I
OUT
= 1.0mA
EN
= V
CC
, EN = 0V, 0 ≤ R
OUT
≤ V
CC
Figure 2
Figure 2
SHDN
= 0V, R4, R5
SHDN
= V
CC
MAX200–MAX211
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
C
L
= 50pF to 2500pF,
R
L
= 3kΩ to 7kΩ,
V
CC
= 5V, T
A
= +25°C
measured from +3V to
-3V or -3V to +3V
MAX200, MAX202–MAX211, MAX213
MAX201
300
3
5.5
4
±10
30
V/µs
30
±60
mA
kbps
MAX205, MAX206, MAX209, MAX211,
MAX213
MAX205, MAX206, MAX209, MAX211,
MAX213
MAX213
CONDITIONS
Active mode
Shutdown mode, MAX213, R4, R5
Active mode
Shutdown mode, MAX213, R4, R5
0.2
3
MIN
0.8
0.6
TYP
1.2
1.5
1.7
1.5
0.5
5
2.4
2.4
1.0
7
0.4
3.5
0.05
600
200
4
0.5
0.5
40
10
10
Ω
µs
±10
MAX
UNITS
V
V
V
kΩ
V
V
µA
ns
ns
V
CC
= +5V, no hysteresis in shutdown
MAX201, MAX202, MAX203
All others
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Maxim Integrated
│
3
MAX200–MAX209/
MAX211/MAX213
Typical Operating Characteristics
MAX200/204/205/206/207/208/211/213
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX200-MAX213 toc01
+5V, RS-232 Transceivers
with 0.1μF External Capacitors
MAX200-MAX213 toc02
6.8
Tx OUTPUT VOLTAGE (IVI)
6.6
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
0
V
CC
= +5V
ALL Tx OUTPUTS
LOADED 3kΩIIC
L
T
A
= +25°C
116kbps
60kbps
20kbps
20
18
Tx SLEW RATE (V/µs)
16
14
12
10
8
6
4
+SLEW RATE
0
2
Tx OUTPUT VOLTAGE (IVI)
V
CC
= +5V
ALL Tx OUTPUTS
LOADED 3kΩIIC
L
T
A
= +25°C
9.8
9.6
9.4
9.2
9.0
8.8
8.6
V
CC
= +5V
ALL Tx OUTPUTS
LOADED 3kΩIIC
L
T
A
= +25°C
V+ = 12V
0
20kbps
60kbps
-SLEW RATE
116kbps
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
8.4
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
MAX200-MAX213 toc04
-SLEW RATE
Tx OUTPUT VOLTAGE (IVI)
9.5
9.0
8.5
8.0
7.5
7.0
V
CC
= +5V
ALL Tx OUTPUTS
LOADED 3kΩIIC
L
T
A
= +25°C
V+ = 12V
0
Tx SLEW RATE (V/µs)
20kbps
60kbps
20
15
V
CC
= +5V
ALL Tx OUTPUTS
LOADED 3kΩIIC
L
T
A
= +25°C
V+ = 12V
MAX209
10
5
+SLEW RATE
112kbps
5000
0
0
MAX201
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
MAX200-MAX213 toc06
MAX200-MAX213 toc07
5.0
Tx OUTPUT VOLTAGE (V)
2.5
0
-2.5
-5.0
-7.0
240kbps
V
CC
= +4.5V, T
A
= +25°C
BOTH Tx OUTPUTS, LOADED 3kΩIIC
L
ONE TRANSMITTER AT FULL DATA RATE
ONE TRANSMITTER AT 1/8 DATA RATE
240kbps
120kbps
20kbps
Tx SLEW RATE (V/µs)
120kbps
10
8
6
4
2
-SLEW RATE
20kbps
120kbps
240kbps
SUPPLY CURRENT (mA)
20kbps
12
+SLEW RATE
20kbps
120kbps
240kbps
30
25
20
V
CC
= +4.5V, T
A
= +25°C,
BOTH Tx OUTPUTS, LOADED 3kΩIIC
L
ONE TRANSMITTER AT FULL DATA RATE
ONE TRANSMITTER AT 1/8 DATA RATE
240kbps
120kbps
0
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
0
V
CC
= +4.5V, T
A
= +25°C
BOTH Tx OUTPUTS, LOADED 3kΩIIC
L
ONE TRANSMITTER AT FULL DATA RATE
ONE TRANSMITTER AT 1/8 DATA RATE
0
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
20kbps
15
10
0
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
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Maxim Integrated
│
4
MAX200-MAX213 toc08
7.5
MAX202/203
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
14
MAX202/203
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
35
MAX202/203
SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX200-MAX213 toc05
10.0
MAX201
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
25
MAX201/MAX209
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
MAX200-MAX213 toc03
7.0
22
MAX200/204/205/206/207/208/211/213
TRANSMITTER SKEW RATE
vs. LOAD CAPACITANCE
10.0
MAX209
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX200–MAX209/
MAX211/MAX213
+5V, RS-232 Transceivers
with 0.1μF External Capacitors
Detailed Description
I
SHDN
+5.5V
0.1µF
C1+
0.1µF
C1-
C2+
0.1µF
C2-
V
CC
0.1µF
The MAX200–MAX209/MAX211/MAX213 consist of three
sections: charge-pump voltage converters, drivers (trans-
mitters), and receivers. Each section is described in detail.
V+
MAX200
MAX205
MAX206
MAX211
MAX213
+5.5V
+5V to ±10V Dual Charge-Pump
Voltage Converter
0.1µF
V-
400kΩ
+5.5V
T
IN
T1 T0 T5
T
OUT
3kΩ
R
OUT
0V OR +5.5V
DRIVE
+5.5V (0)
EN
(EN)
SHDN
(SHDN)
GND
R1 T0 R5
R
IN
5kΩ
The +5V to ±10V conversion is performed by two charge-
pump voltage converters (Figure 4). The first uses capaci-
tor C1 to double +5V to +10V, storing +10V on the V+
output filter capacitor, C3. The second chargepump volt-
age converter uses capacitor C2 to invert +10V to -10V,
storing -10V on the V- output filter capacitor, C4.
The MAX201 and MAX209 include only the V+ to Vcharge
pump, and are intended for applications that have a V
CC
= +5V supply and a V+ supply in the +9V to +13.2V range.
In shutdown mode, V+ is internally connected to V
CC
by
a 1kΩ pulldown resistor and V- is internally connected to
ground by a 1kΩ pullup resistor.
+5.5V
RS-232 Drivers
NOTE 1:
( ) ARE FOR MAX213.
NOTE 2:
CAPACITORS CAN BE POLARIZED OR UNPOLARIZED.
Figure 1. Shutdown Current Test Circuit
EN
INPUT +3V
0V
OUTPUT ENABLE TIME
+3.5V
RECEIVER
OUTPUT
C
L
= 150pF
+0.8V
+3V
When V
CC
= +5V, the typical driver output-voltage swing
is ±8V when loaded with a nominal 5kΩ RS-232 receiver.
The output swing is guaranteed to meet the EIA/TIA-232E
and V.28 specifications, which call for ±5V minimum out-
put levels under worst-case conditions. These include
a minimum 3kΩ load, V
CC
= +4.5V, and the maximum
operating temperature. The open-circuit output-voltage
swing ranges from (V+ - 0.6V) to V-.
Input thresholds are both CMOS and TTL compatible. The
inputs of unused drivers can be left unconnected since
400kΩ pullup resistors to V
CC
are included onchip. Since
all drivers invert, the pullup resistors force the outputs of
unused drivers low. The input pullup resistors typically
source 15μA; therefore, the driver inputs should be driven
high or open circuited to minimize power-supply current
in shutdown mode.
When in low-power shutdown mode, the driver outputs
are turned off and their leakage current is less than 1mA,
even if the transmitter output is backdriven between 0V
and (V
CC
+ 6V). Below -0.5V, the transmitter output is
diode clamped to ground with a 1kΩ series impedance.
The transmitter output is also zener clamped to approxi-
mately (V
CC
+ 6V), with a 1kΩ series impedance.
EN
INPUT
0V
OUTPUT ENABLE TIME
V
OH
V
OL
V
OH
- 0.1V
R
L
= 1kΩ
V
OL
+ 0.1V
RECEIVER
OUTPUTS
+ 2.5V
NOTE:
POLARITY OF
EN
IS REVERSED FOR THE MAX213.
Figure 2. Receiver Output Enable and Disable Timing
语音作为自然的人机接口，可以使车载导航系统实现更安全、更人性化的操作。通过国内外车载导航系统的功能对比可知，支持语音交互是车载导航系统的一个发展趋势。另外，市场信息服务公司J.D Power and Associates的调研数据也表明，56％的消费者更倾向于选择声控的导航系统。因此，开发车载语音导航系统是很有意义的。目前，国内已经具备开发车载语音导航系统的技术基础，特别是文语转换TTS技术...[详细]
中风发生时，一切都是以秒来计算的。延误治疗可能导致大脑重大损伤。伦敦大学医学院的一位博士Alistair McEwan已经获得行为医学研究所(Action Medical Research)的同意，为急救人员开发一种无线诊断系统来减少时间延误。感谢抗血栓药物，一些病人在病情发作的三个小时之内可以完全恢复。但出血也会导致中风。医生在治疗之前需要确定发病原因，因为不适当的服用抗血栓药物会加重损害。...[详细]
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