MAX232ACPE芯片手册资源-CSDN文库

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### MAX232ACPE芯片手册关键知识点 #### 一、概述 MAX232ACPE作为MAX220–MAX249系列的一部分，是一款高性能的电平转换芯片，主要用于实现EIA/TIA-232E和V.28/V.24通信接口中的电平转换功能。该系列特别适用于电源电压为±12V不可用的场合，比如电池供电系统或便携式设备中。MAX232ACPE能够通过单个+5V电源工作，并在关断模式下具有极低的功耗（小于5μW），这使得它在需要节省空间和降低功耗的应用场景中非常受欢迎。 #### 二、应用场景 1. **便携式计算机**：由于其低功耗特性，MAX232ACPE非常适合便携式计算设备中用于实现串行通信。 2. **低功耗调制解调器**：对于需要节省电能的调制解调器应用，MAX232ACPE是理想选择。 3. **接口转换**：在不同的通信标准之间进行电平转换，如将TTL电平信号转换为RS-232标准电平。 4. **电池供电的RS-232系统**：针对使用电池供电的设备，如手持终端等，MAX232ACPE可以提供高效且稳定的通信接口。 5. **多点RS-232网络**：在复杂的网络环境中，多个设备通过RS-232接口相互通信时，MAX232ACPE可以确保数据传输的准确性和稳定性。 #### 三、特性 1. **优于双极性技术**： - 可以仅使用单一的+5V电源供电运行，同时支持+5V和+12V供电（MAX231/MAX239）。 - 在关断模式下具有低功耗接收状态（MAX223/MAX242）。 - 满足所有EIA/TIA-232E和V.28规格要求。 - 支持多个驱动器和接收器配置。 - 提供三态输出的驱动器和接收器。 - MAX243支持开放线路检测功能。 2. **低功耗模式**：在关断模式下，MAX232ACPE的功率消耗可以降低到5μW以下，这对于延长电池寿命至关重要。 3. **多通道设计**：根据不同的型号，MAX232ACPE可以支持不同数量的驱动器和接收器组合，如MAX220支持2个驱动器和2个接收器，而MAX225则支持5个驱动器和5个接收器。 #### 四、产品选型 | 型号 | 温度范围 | 封装类型 | |---------------|-----------------|-----------------| | MAX220CPE | 0°C to +70°C | 16引脚塑料DIP | | MAX220CSE | 0°C to +70°C | 16引脚窄SO封装 | | MAX220CWE | 0°C to +70°C | 16引脚宽SO封装 | | MAX220C/D | 0°C to +70°C | Die | | MAX220EPE | -40°C to +85°C | 16引脚塑料DIP | | MAX220ESE | -40°C to +85°C | 16引脚窄SO封装 | | MAX220EWE | -40°C to +85°C | 16引脚宽SO封装 | | MAX220EJE | -40°C to +85°C | 16引脚CERDIP | | MAX220MJE | -55°C to +125°C | 16引脚CERDIP | #### 五、电源要求及特性 - **供电范围**：支持单一的+5V电源供电，部分型号也支持+5V和+12V供电。 - **外部电容**：根据型号的不同，所需的外部电容值也会有所不同，如MAX220需要4.7μF/10μF的电容，而MAX222只需要0.1μF的电容。 - **关断模式**：某些型号支持关断模式，在该模式下可以进一步降低功耗。 - **数据速率**：支持高达120kbps至200kbps的数据传输速率，具体取决于型号。 MAX232ACPE及其系列成员为串行通信领域提供了高度灵活且可靠的解决方案，特别是在那些对功耗和尺寸有严格要求的应用场景中表现突出。通过了解这些关键特性，开发者可以更好地评估MAX232ACPE是否符合其项目的特定需求。

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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.

________________________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)

Ordering Information

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

________________________________________________________________ Maxim Integrated Products 1

Selection Table

19-4323; Rev 9; 4/00

PART

MAX220CPE

MAX220CSE

MAX220CWE 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 4.7/10 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 free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

查询MAX220供应商

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243

ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243

= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T

= T

MIN

to T

MAX

‚ unless otherwise noted.)

Note 1: Input voltage measured with T

OUT

in high-impedance state, SHDN or V

= 0V.

Note 2: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.

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.

Supply Voltage (V

) ...............................................-0.3V to +6V

Input Voltages

..............................................................-0.3V to (V

- 0.3V)

(Except MAX220) ........................................................±30V

(MAX220).....................................................................±25V

OUT

(Except MAX220) (Note 1) .......................................±15V

OUT

(MAX220)...............................................................±13.2V

Output Voltages

OUT

...................................................................................±15V

OUT

.........................................................-0.3V to (V

+ 0.3V)

Driver/Receiver Output Short Circuited to GND.........Continuous

Continuous Power Dissipation (T

= +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, 10sec) .............................+300°C

1.4 0.8Input Logic Threshold Low

UNITSMIN TYP MAXPARAMETER CONDITIONS

Input Logic Threshold High

All except MAX220 2 1.4

All except MAX220, normal operation 540

Logic Pull-Up/lnput Current

SHDN = 0V, MAX222/242, shutdown, MAX220

±0.01 ±1

µA

= 5.5V, SHDN = 0V, V

OUT

= ±15V, MAX222/242

±0.01 ±10

Output Leakage Current

= SHDN = 0V, V

OUT

= ±15V

±0.01 ±10

µA

All except MAX220, normal operation 200 116Data Rate kb/s

Transmitter Output Resistance V

= V+ = V- = 0V, V

OUT

= ±2V 300 10M Ω

Output Short-Circuit Current V

OUT

= 0V ±7 ±22 mA

RS-232 Input Voltage Operating Range ±30 V

All except MAX243 R2

0.8 1.3

RS-232 Input Threshold Low V

= 5V

MAX243 R2

(Note 2) -3

All except MAX243 R2

1.8 2.4

RS-232 Input Threshold High V

= 5V

MAX243 R2

(Note 2) -0.5 -0.1

All except MAX243, V

= 5V, no hysteresis in shdn. 0.2 0.5 1

RS-232 Input Hysteresis

MAX243 1

RS-232 Input Resistance 357kΩ

TTL/CMOS Output Voltage Low I

OUT

= 3.2mA 0.2 0.4 V

TTL/CMOS Output Voltage High I

OUT

= -1.0mA 3.5 V

- 0.2 V

Sourcing V

OUT

= GND -2 -10

mATTL/CMOS Output Short-Circuit Current

Shrinking V

OUT

= V

10 30

V±5 ±8Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND

RS-232 TRANSMITTERS

RS-232 RECEIVERS

2.4MAX220: V

= 5.0V

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 3

Note 3: MAX243 R2

OUT

is guaranteed to be low when R2

is ≥ 0V or is floating.

ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)

= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T

= T

MIN

to T

MAX

‚ unless otherwise noted.)

Operating Supply Voltage

SHDN Threshold High

4.5 5.5 V

MAX222/242

Transmitter-Output Enable Time

(SHDN goes high), Figure 4

2.0 1.4 V

MAX220 0.5 2

No load

MAX222/232A/233A/242/243 410

MAX222/232A/233A/242/243 61230

MAX220 12

Supply Current (SHDN = V

Figures 5, 6, 11, 19

3kΩ load

both inputs

MAX222/232A/233A/242/243 15

Transition Slew Rate

= +25°C 0.1 10

= 50pF to 2500pF,

= 3kΩ to 7kΩ,

= 5V, T

= +25°C,

measured from +3V

to -3V or -3V to +3V

= 0°C to +70°C

CONDITIONS

250

MAX220 1.5 3 30

V/µs

= -40°C to +85°C 250

MAX222/242, 0.1µF caps

(includes charge-pump start-up)

Shutdown Supply Current MAX222/242

= -55°C to +125°C 35 100

µA

SHDN Input Leakage Current

MAX222/242 ±1 µA

SHDN Threshold Low

MAX222/242 1.4 0.8 V

250

MAX222/232A/233A/242/243 1.3 3.5

µs

PHLT

MAX220 410

Transmitter-Output Disable Time

(SHDN goes low), Figure 4

MAX222/232A/233A/242/243 1.5 3.5

Transmitter Propagation Delay

TLL to RS-232 (normal operation),

Figure 1

PLHT

MAX220 510

µs

V2.0 1.4

MAX222/242, 0.1µF caps

µA±0.05 ±10

600

TTL/CMOS Output Leakage Current

EN Input Threshold High

MAX222/232A/233A/242/243 0.5 1

PHLR

MAX220 0.6 3

PLHR

MAX222/232A/233A/242/243 0.6 1

Receiver Propagation Delay

RS-232 to TLL (normal operation),

Figure 2

PHLT

- t

PLHT

MAX220 0.8 3

µs

MAX222/232A/233A/242/243

PHLS

MAX242 0.5 10

Receiver Propagation Delay

RS-232 to TLL (shutdown), Figure 2

PLHS

MAX242 2.5 10

µs

Receiver-Output Enable Time, Figure 3 t

MAX242

UNITSMIN TYP MAX

125 500

PARAMETER

MAX242

SHDN = V

or EN = V

(SHDN = 0V for MAX222),

0V ≤ V

OUT

≤ V

Receiver-Output Disable Time, Figure 3 t

MAX242 160 500 ns

300

Transmitter + to - Propagation

Delay Difference (normal operation)

MAX220 2000

PHLR

- t

PLHR

MAX222/232A/233A/242/243 100

Receiver + to - Propagation

Delay Difference (normal operation)

MAX220 225

V1.4 0.8

EN Input Threshold Low

MAX242

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 5

...........................................................................-0.3V to +6V

V+ ................................................................(V

- 0.3V) to +14V

V- ............................................................................+0.3V to -14V

Input Voltages

............................................................-0.3V to (V

+ 0.3V)

......................................................................................±30V

Output Voltages

OUT

...................................................(V+ + 0.3V) to (V- - 0.3V)

OUT

.........................................................-0.3V to (V

+ 0.3V)

Short-Circuit Duration, T

OUT

......................................Continuous

Continuous Power Dissipation (T

= +70°C)

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW

16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW

20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW

24-Pin Narrow Plastic DIP

(derate 13.33mW/°C above +70°C) ..........1.07W

24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW

16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW

20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW

24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW

28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W

44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW

14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW

16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW

20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW

24-Pin Narrow CERDIP

(derate 12.50mW/°C above +70°C) ..............1W

24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W

28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW

Operating Temperature Ranges

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, 10sec) .............................+300°C

ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241

ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241

(MAX223/230/232/234/236/237/238/240/241, V

= +5V ±10; MAX233/MAX235, V

= 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,

= 5V ±10%; V+ = 7.5V to 13.2V; T

= T

MIN

to T

MAX

; unless otherwise noted.)

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.

CONDITIONS

MIN TYP MAX

UNITS

Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground ±5.0 ±7.3 V

Power-Supply Current

No load,

= +25°C

510

715

0.4 1

V+ Power-Supply Current

1.8 5

515

Shutdown Supply Current T

= +25°C

15 50

VInput Logic Threshold High

2.0

EN, SHDN (MAX223);

EN, SHDN (MAX230/235/236/240/241)

2.4

Logic Pull-Up Current T

=0V 1.5 200

Receiver Input Voltage

Operating Range

-30 30 V

µA

110

VInput Logic Threshold Low

; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241)

0.8

MAX231/239

MAX223/230/234–238/240/241

MAX232/233

PARAMETER

MAX239

MAX230/235/236/240/241

MAX231

MAX223

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lifeng088174

2012-03-29

谢谢，RS2312通信中的电平转换器件，从而实现电脑与单片机的连接。

zhangranlxd

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