串口扩展及串口电路图（GM8123/8125）打包资料（全）

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串口扩展

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串口电路及串口扩展.rar （6个子文件）

MAX232EPE.pdf 396KB

SP2339_SP2349.pdf 329KB

GM8123.PDF 121KB

GM8125.PDF 346KB

MAX232接线图.jpg 41KB

GM8123&GM8125应用驱动C函数包.PDF 179KB

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

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

+5V-Powered, Multichannel RS-232

Drivers/Receivers

________________________________________________________________ Maxim Integrated Products 1

Selection Table

19-4323; Rev 15; 1/06

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 0.047/0.33 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.

Ordering Information

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

AutoShutdown and UCSP are trademarks of Maxim Integrated

Products, Inc.

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: 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

= 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.

Supply Voltage (V

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

V+ (Note 1) ..................................................(V

- 0.3V) to +14V

V- (Note 1) .............................................................+0.3V to +14V

Input Voltages

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

- 0.3V)

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

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

OUT

(Except MAX220) (Note 2) .......................................±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, 10s) (Note 3) ...................+300°C

PARAMETER CONDITIONS MIN TYP MAX UNITS

RS-232 TRANSMITTERS

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

Input Logic Threshold Low 1.4 0.8 V

All devices except MAX220 2 1.4

Input Logic Threshold High

MAX220: V

= 5.0V 2.4

All except MAX220, normal operation 5 40

Logic Pullup/lnput Current

SHDN = 0V, MAX222/MAX242, shutdown,

MAX220

±0.01 ±1

µA

= 5.5V, SHDN = 0V, V

OUT

= ±15V,

MAX222/MAX242

±0.01 ±10

OUT

= ±15V ±0.01 ±10

Output Leakage Current

= SHDN = 0V

MAX220, V

OUT

= ±12V ±25

µA

Data Rate 200 116 kbps

Transmitter Output Resistance V

= V+ = V- = 0V, V

OUT

= ±2V 300 10M Ω

OUT

= 0V ±7 ±22

Output Short-Circuit Current V

OUT

= 0V

MAX220 ±60

RS-232 RECEIVERS

±30

RS-232 Input Voltage Operating Range

MAX220 ±25

All except MAX243 R2

0.8 1.3

RS-232 Input Threshold Low V

= 5V

MAX243 R2

(Note 4) -3

All except MAX243 R2

1.8 2.4

RS-232 Input Threshold High V

= 5V

MAX243 R2

(Note 4) -0.5 -0.1

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

_______________________________________________________________________________________ 3

Note 4: 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.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

All except MAX220/MAX243, V

= 5V, no

hysteresis in SHDN

0.2 0.5 1.0

MAX220 0.3

RS-232 Input Hysteresis

MAX243 1

35 7

RS-232 Input Resistance T

= +25°C (MAX220)

35 7

KΩ

OUT

= 3.2mA 0.2 0.4

TTL/CMOS Output Voltage Low

OUT

= 1.6mA (MAX220) 0.4

TTL/CMOS Output Voltage High I

OUT

= -1.0mA 3.5 V

- 0.2 V

Sourcing V

OUT

= GND -2 -10

TTL/CMOS Output Short-Circuit Current

Shrinking V

OUT

= V

10 30

TTL/CMOS Output Leakage Current

SHDN = V

or EN = V

(SHDN = 0V for

MAX222), 0V ≤ V

OUT

≤ V

±0.05 ±10 µA

EN Input Threshold Low MAX242 1.4 0.8 V

EN Input Threshold High MAX242 2.0 1.4 V

Operating Supply Voltage 4.5 5.5 V

MAX220 0.5 2

No load

MAX222/MAX232A/MAX233A/

MAX242/MAX243

410

MAX220 12

Supply Current (SHDN = V

figures 5, 6, 11, 19

3kΩ load both

inputs

MAX222/MAX232A/MAX233A/

MAX242/MAX243

µA

= +25°C 0.1 10

= 0°C to +70°C 2 50

= -40°C to +85°C 2 50

Shutdown Supply Current

MAX222/

MAX242

= -55°C to +125°C 35 100

µA

SHDN Input Leakage Current MAX222/MAX242 ±1 µA

SHDN Threshold Low MAX222/MAX242 1.4 0.8 V

SHDN Threshold High MAX222/MAX242 2.0 1.4 V

MAX222/MAX232A/MAX233/

MAX242/MAX243

61230

Transition Slew Rate

= 50pF to

2500pF, R

= 3kΩ

to 7kΩ, V

= 5V,

= +25°C,

measured from

+3V to -3V or -3V

MAX220 1.5 3 30.0

V/µs

MAX222/MAX232A/MAX233/

MAX242/MAX243

1.3 3.5

PHLT

MAX220 4 10

MAX222/MAX232A/MAX233/

MAX242/MAX243

1.5 3.5

Transmitter Propagation Delay TLL to

RS-232 (Normal Operation), Figure 1

PLHT

MAX220 5 10

µs

MAX220–MAX249

+5V-Powered, Multichannel RS-232

Drivers/Receivers

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243

-10

05 15 25

OUTPUT VOLTAGE vs. LOAD CURRENT

-4

-6

-8

-2

MAX220-01

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

0.1

EITHER V+ OR V- LOADED

= ±5V

NO LOAD ON

TRANSMITTER OUTPUTS

(EXCEPT MAX220, MAX233A)

V- LOADED, NO LOAD ON V+

V+ LOADED, NO LOAD ON V-

1µF

0.1µF

010 40 60

AVAILABLE OUTPUT CURRENT

vs. DATA RATE

MAX220-02

DATA RATE (kbits/sec)

OUTPUT CURRENT (mA)

20 30 50

OUTPUT LOAD CURRENT

FLOWS FROM V+ TO V-

= +5.25V

ALL CAPS

0.1µF

= +4.75V

+10V

-10V

MAX222/MAX242

ON-TIME EXITING SHUTDOWN

+5V

MAX220-03

500µs/div

V+, V- VOLTAGE (V)

F CAPS

V+

V-

SHDN

0.1

F CAPS

1µF CAPS

0.1µF CAPS

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.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

MAX222/MAX232A/MAX233/

MAX242/MAX243

0.5 1

PHLR

MAX220 0.6 3

MAX222/MAX232A/MAX233/

MAX242/MAX243

0.6 1

Receiver Propagation Delay RS-232 to

TLL (Normal Operation), Figure 2

PLHR

MAX220 0.8 3

µs

PHLS

MAX242 0.5 10

Receiver Propagation Delay RS-232 to

TLL (Shutdown), Figure 2

PHLS

MAX242 2.5 10

µs

Receiver-Output Enable Time, Figure 3 t

MAX242 125 500 ns

Receiver-Output Disable Time, Figure 3 t

MAX242 160 500 ns

Transmitter-Output Enable Time (SHDN

Goes High), Figure 4

MAX222/MAX242, 0.1µF

caps (includes charge-pump

start-up)

250 µs

Transmitter-Output Disable Time (SHDN

Goes Low), Figure 4

MAX222/MAX242,

0.1µF caps

600 ns

MAX222/MAX232A/MAX233/

MAX242/MAX243

300

Transmitter + to - Propagation Delay

Difference (Normal Operation)

PHLT

- t

PLHT

MAX220 2000

MAX222/MAX232A/MAX233/

MAX242/MAX243

100

Receiver + to - Propagation Delay

Difference (Normal Operation)

PHLR

- t

PLHR

MAX220 225

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, 10s) (Note 4) ...................+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