MAX3225EAAP-T Maxim Integrated, MAX3225EAAP-T Datasheet

no-image

MAX3225EAAP-T

Manufacturer Part Number
MAX3225EAAP-T
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX3224E, MAX3225E, MAX3226E, MAX3227E, MAX3244E, MAX3245Er
Datasheet

Specifications of MAX3225EAAP-T

Data Rate
1 Mbps
Operating Supply Voltage
3 V to 5.5 V
Supply Current
1 mA
Operating Temperature Range
0 C to + 70 C
Function
Transceiver
Number Of Drivers
2
Number Of I/os
8
Number Of Receivers
2
Propagation Delay Time Ns
0.15 us
Shutdown
Yes
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
The MAX3224E/MAX3225E/MAX3226E/MAX3227E/
MAX3244E/MAX3245E are 3V-powered EIA/TIA-232
and V.28/V.24 communications interfaces with automat-
ic shutdown/wakeup features, high data-rate capabili-
ties, and enhanced electrostatic discharge (ESD)
protection. All transmitter outputs and receiver inputs
are protected to ±15kV using IEC 1000-4-2 Air-Gap
Discharge, ±8kV using IEC 1000-4-2 Contact Discharge,
and ±15kV using the Human Body Model.
All devices achieve a 1µA supply current using Maxim’s
revolutionary AutoShutdown Plus™ feature. These
devices automatically enter a low-power shutdown
mode when the RS-232 cable is disconnected or the
transmitters of the connected peripherals are inactive,
and the UART driving the transmitter inputs is inactive
for more than 30 seconds. They turn on again when
they sense a valid transition at any transmitter or receiv-
er input. AutoShutdown Plus saves power without
changes to the existing BIOS or operating system.
The MAX3225E/MAX3227E/MAX3245E also feature
MegaBaud™ operation, guaranteeing 1Mbps for high-
speed applications such as communicating with ISDN
modems. The MAX3224E/MAX3226E/MAX3244E guar-
antee 250kbps operation. The transceivers have a pro-
prietary low-dropout transmitter output stage enabling
true RS-232 performance from a +3.0V to +5.5V supply
with a dual charge pump. The charge pump requires
only four small 0.1µF capacitors for operation from a
3.3V supply. The MAX3224E–MAX3227E feature a logic-
level output (READY) that asserts when the charge
pump is regulating and the device is ready to begin
transmitting.
All devices are available in a space-saving TQFN,
SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/
MAX3245E) packages.
AutoShutdown Plus, MegaBaud, and UCSP are trademarks of
Maxim Integrated Products, Inc.
________________________Applications
________________General Description
±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V,
RS-232 Transceivers with AutoShutdown Plus
Notebook, Subnotebook, and Palmtop Computers
Cellular Phones
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
Printers
Functional Diagrams
MAX3224E/MAX3225E/
MAX3226E/MAX3227E/
MAX3244E/MAX3245E
♦ ♦ For Space-Constrained Applications:
♦ ♦ For Low-Voltage or Data Cable Applications:
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Ordering Information continued at end of data sheet.
_____________________ Selector Guide
__Next Generation Device Features
MAX3224ECTP+
MAX3224ECUP+
MAX3224ECAP+
MAX3224ECPP+
MAX3224EETP+
MAX3224EEUP+
MAX3224EEAP+
MAX3224EEPP+
MAX3224EAAP+
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
MAX3228E/MAX3229E: ±15kV ESD-Protected,
+2.5V to +5.5V, RS-232 Transceivers in UCSP™
MAX3222E/MAX3232E/MAX3241E/MAX3246E:
±15kV ESD-Protected, Down to 10nA, +3.0V to
+5.5V, Up to 1Mbps, True RS-232 Transceivers
(MAX3246E Available in UCSP)
MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,
2Tx/2Rx RS-232 Transceivers with ±15kV
ESD-Protected I/O and Logic Pins
PART
PART
RECEIVERS
DRIVERS/
NO. OF
2/2
2/2
1/1
1/1
3/5
3/5
-40°C to +125°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
GUARANTEED
DATA RATE
(bps)
250k
250k
250k
1M
1M
1M
OUTPUT
READY
PIN-PACKAGE
20 TQFN-EP*
20 TSSOP
20 SSOP
20 Plastic DIP
20 TQFN-EP*
20 TSSOP
20 SSOP
20 Plastic DIP
20 SSOP
19-1339; Rev 10; 3/11
Shutdown
Auto-
Plus

Related parts for MAX3225EAAP-T

MAX3225EAAP-T Summary of contents

Page 1

... Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. AutoShutdown Plus, MegaBaud, and UCSP are trademarks of UCSP is a trademark of Maxim Integrated Products, Inc. Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. ...

Page 2

... 5. 3. +25° 5. +25° MIN MAX MIN TYP MAX UNITS 1 10 µ µ 2.4 0.5 V ±0.01 ±1 µA ±0.05 ±10 µ -25 +25 V 0.6 1.2 V 0.8 1.5 1.5 2.4 V 1.8 2.4 0 kΩ Maxim Integrated ...

Page 3

... Receiver Positive or Negative t INVL Threshold to INVALID Low Receiver or Transmitter Edge Transmitters Enabled Receiver or Transmitter Edge to t AUTOSHDN Transmitters Shutdown Maxim Integrated = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10 +25°C.) A CONDITIONS All transmitter outputs loaded with 3kΩ to ground 0V, transmitter outputs = ± 5.5V ± ...

Page 4

... T A MIN MIN TYP MAX 250 0.15 0.15 200 200 100 50 = 150pF MIN MIN TYP MAX 250 1000 1000 0.15 0.15 200 200 150 Maxim Integrated MAX UNITS kbps µ V/µ MAX UNITS kbps µ V/µs ...

Page 5

... LOAD = 3kΩ AVERAGE: 10 PARTS 500 1000 1500 2000 2500 LOAD CAPACITANCE (pF) Maxim Integrated MAX3224E/MAX3226E SLEW RATE vs. LOAD CAPACITANCE -SLEW 10 +SLEW FOR DATA RATES UP TO 250kbps 0 0 1000 2000 3000 4000 LOAD CAPACITANCE (pF) MAX3225E/MAX3227E SLEW RATE vs ...

Page 6

... TRANSMITTERS AT 15.6kbps 50 250kbps 5000 0 1000 2000 3000 LOAD CAPACITANCE (pF) MAX3245E SLEW RATE vs. LOAD CAPACITANCE 1 TRANSMITTER AT 1Mbps 2 TRANSMITTERS AT 62.5kbps 0 400 800 1200 1600 2000 LOAD CAPACITANCE (pF) MAX3245E TRANSMITTER SKEW vs. LOAD CAPACITANCE 0 1000 2000 3000 Maxim Integrated 120kbps 20kbps 4000 5000 ...

Page 7

... Maxim Integrated PIN MAX3244E MAX3245E MAX3245E TQFN SO/ SSOP/ TSSOP 1 — — 10, 11 ...

Page 8

... Drive low to shut down transmitters, receivers (except R2OUTB), and charge pump. This overrides AutoShutdown Plus and FORCEON (Table 1). TTL/CMOS Noninverting R2OUTB Complementary Receiver Outputs. Always active. No Connection. Not internally N.C. connected. Exposed Pad. Solder the EP exposed pad to the ground plane or leave unconnected. Maxim Integrated ...

Page 9

... When powered off or shut down, the outputs can be driven to ±12V. The transmitter inputs do not have pullup resistors. Connect unused inputs to GND LapLink is a registered trademark of Laplink Software, Inc. Maxim Integrated PROTECTION DIODE UART Tx ...

Page 10

... R_OUT R2OUTB MAX3225E/ (MAX3244E/ (MAX3244E/ MAX3226E/ MAX3245E) MAX3245E) MAX3227E) Active High-Z Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active High-Z Active AutoShutdown Plus Mode Maxim Integrated ...

Page 11

... MAX3224E– MAX3227E/MAX3244E/MAX3245E. FORCEON and FORCEOFF override AutoShutdown Plus circuitry. When neither control is asserted, the IC selects between these states automatically based on the last receiver or transmitter input edge received. Maxim Integrated EDGE T_IN DETECT 30μs TIMER INVALID ...

Page 12

... Maxim’s engineers have developed state-of-the-art structures to protect POWER- MANAGEMENT UNIT Figure 5. AutoShutdown Plus Initial Turn-On to Wake Up a Mouse or Another System INVALID } REGION t WU MASTER SHDN LINE 0.1μF 1MΩ FORCEOFF FORCEON MAX3224E MAX3225E MAX3226E MAX3227E MAX3244E MAX3245E Maxim Integrated ...

Page 13

... Human Body Model 2) ±8kV using the Contact-Discharge Method specified in IEC 1000-4-2 3) ±15kV using IEC 1000-4-2’s Air-Gap Method. Maxim Integrated R C CHARGE CURRENT LIMIT RESISTOR HIGH- DEVICE ...

Page 14

... As they become active, the two trans- mitter outputs are shown going to opposite RS-232 lev- els (one transmitter input is high, the other is low). Each FORCEON = FORCEOFF T1OUT T2OUT READY 5μs/div , to maintain the proper ratios (C1 to Power-Supply Decoupling bypass capacitor CC Transmitter Outputs when Exiting Shutdown Maxim Integrated ...

Page 15

... MAX3244E C2- MAX3245E T_ OUT OUT 5kΩ FORCEON V FORCEOFF CC GND *C3 CAN BE RETURNED GND. CC Figure 9. Loopback Test Circuit Maxim Integrated T1IN T1OUT R1OUT Figure 10. MAX3224E/MAX3226E/MAX3244E Loopback Test Result at 120kbps T1IN T1OUT R1OUT V+ C3* Figure 11. MAX3224E/MAX3226E/MAX3244E Loopback Test Result at 250kbps V- C4 T1IN R_ IN ...

Page 16

... Figure 13a. Mouse Driver Test Circuit 0.1μ 0.1μF T1OUT 9 T2OUT 10 11 T3OUT R1IN 4 5kΩ R2IN 5 5kΩ 6 R3IN RS-232 INPUTS 5kΩ R4IN 7 5kΩ R5IN 8 5kΩ 25 COMPUTER SERIAL PORT + GND Tx SERIAL MOUSE Maxim Integrated ...

Page 17

... MAX3226E +3.0 to +5.5 1/1 MAX3227E +3.0 to +5.5 1/1 Maxim Integrated The MAX3244E/MAX3245E are specifically designed to power serial mice while operating from low-voltage V OUT+ power supplies. They have been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3244E/MAX3245E successfully drove all serial mice tested and met their respective current and voltage requirements ...

Page 18

... PIN OUT REFERS TO SO/SSOP/TSSOP PACKAGES +3. C1+ V+ C1- 3 MAX3244E*** C2+ V- MAX3245E C2- T1IN T1OUT 9 T2IN T2OUT 10 T3IN T3OUT 11 FORCEOFF INVALID 21 AutoShutdown FORCEON Plus R2OUTB R1OUT R1IN 4 R2OUT R2IN 5 R3OUT R3IN 6 R4OUT R4IN 7 R5OUT R5IN 8 GND 25 Maxim Integrated C3 0.1μF C4 0.1μF ...

Page 19

... GND FORCEOFF MAX3224E MAX3225E READY TQFN TOP VIEW FORCEOFF 14 READY MAX3226E V+ 15 MAX3227E C1 Maxim Integrated + READY FORCEOFF GND 3 18 C1- T1OUT 4 17 MAX3224E C2+ R1IN 5 16 MAX3225E C2- R1OUT FORCEON 7 T2OUT ...

Page 20

... MAX3225ECPP+ 0°C to +70°C MAX3225EETP+ -40°C to +85°C MAX3225EEUP+ -40°C to +85°C MAX3225EEAP+ -40°C to +85°C MAX3225EEPP+ -40°C to +85°C MAX3225EAAP+ -40°C to +125°C MAX3226ECTE+ 0°C to +70°C MAX3226ECUE+ 0°C to +70°C MAX3226ECAE+ 0°C to +70°C MAX3226EEAE+ -40°C to +85°C MAX3226EETE+ -40° ...

Page 21

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2011 Maxim Integrated DESCRIPTION The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc. Revision History PAGES CHANGED 1, 20 ...

Related keywords