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 MAX3224–MAX3227/MAX3244/MAX3245 are 3V-
powered EIA/TIA-232 and V.28/V.24 communications
interfaces with automatic shutdown/wakeup features
and high data-rate capabilities.
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 MAX3225/MAX3227/MAX3245 also feature
MegaBaud™ operation, guaranteeing 1Mbps for high-
speed applications such as communicating with ISDN
modems. The MAX3224/MAX3226/MAX3244 guarantee
250kbps operation. The transceivers have a proprietary
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 MAX3224–MAX3227 feature a logic-level output
(READY) that asserts when the charge pump is regulat-
ing and the device is ready to begin transmitting.
All devices are available in a space-saving TQFN,
TSSOP, and SSOP packages.
AutoShutdown Plus, MegaBaud, and UCSP are trademarks
of Maxim Integrated Products, Inc.
________________________Applications
________________General Description
RS-232 Transceivers with AutoShutdown Plus
Notebook, Subnotebook, and Palmtop Computers
Cellular Phones
Battery-Powered Equipment
Handheld Equipment
Peripherals
Printers
1µA Supply Current, 1Mbps, 3.0V to 5.5V,
Functional Diagrams
♦ ♦ For Smaller Packaging:
♦ ♦ For Low-Voltage or Data Cable Applications:
♦ ♦ For Integrated ESD Protection:
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Ordering Information continued at end of data sheet.
_______________Ordering Information
_____________________ Selector Guide
_Next Generation Device Features
MAX3224CPP+
MAX3224CAP+
MAX3224CTP+
MAX3224CUP+
MAX3224EPP+
MAX3224EAP+
MAX3224ETP+
MAX3224EUP+
MAX3224
MAX3225
MAX3226
MAX3227
MAX3244
MAX3245
MAX3228/MAX3229: +2.5V to +5.5V RS-232
Transceivers in UCSP™
MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,
2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-
Protected I/O and Logic Pins
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: ±15kV ESD-Protected, Down to 10nA,
+3.0V to +5.5V, Up to 1Mbps, True RS-232
Transceivers (MAX3246E Available in UCSP)
PART
MAX3224–MAX3227/
MAX3244/MAX3245
PART
RECEIVERS
DRIVERS/
NO. OF
2/2
2/2
1/1
1/1
3/5
3/5
-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
GUARANTEED
DATA RATE
(bps)
250k
250k
250k
1M
1M
1M
OUTPUT
READY
PIN-PACKAGE
20 PDIP
20 SSOP
20 TQFN-EP*
20 TSSOP
20 PDIP
20 SSOP
20 TQFN-EP*
20 TSSOP
19-1289; Rev 5; 2/11
Shutdown
Auto-
Plus

Related parts for MAX3225EAAP+T

MAX3225EAAP+T Summary of contents

Page 1

... AutoShutdown Plus, MegaBaud, and UCSP are trademarks Functional Diagrams continued at end of data sheet. of Maxim Integrated Products, Inc. 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. MAX3224–MAX3227/ ...

Page 2

... 5. 3. +25° 5. +25° +70° MIN MIN TYP MAX , 0.3 1 0.8 2 2.4 0.5 ±0.01 ±1 ±0.05 ± -25 +25 0.6 1.2 0.8 1.5 1.5 2.4 1.8 2.4 0 Maxim Integrated MAX UNITS µA µ µA µ kΩ ...

Page 3

... Receiver Positive or Negative Threshold to INVALID High Receiver Positive or Negative Threshold to INVALID Low Receiver or Transmitter Edge to Transmitters Enabled Receiver or Transmitter Edge to t AUTOSHDN Transmitters Shutdown Maxim Integrated = +25°C.) A CONDITIONS All transmitter outputs loaded with 3kΩ to ground transmitter outputs = ± 5.5V, V ...

Page 4

... C = 150pF 1000pF C = 150pF 2500pF MIN TYP 250 1000 1000 0.15 0.15 200 200 MIN MAX MAX UNITS kbps µ V/µ MIN MAX MAX UNITS kbps µ 150 V/µs Maxim Integrated ...

Page 5

... LOAD = 3kΩ AVERAGE; 10 PARTS 500 1000 1500 2000 2500 LOAD CAPACITANCE (pF) Maxim Integrated MAX3224/MAX3226 SLEW RATE vs. LOAD CAPACITANCE +SLEW FOR DATA RATES UP TO 250kbps 0 5000 0 1000 2000 3000 LOAD CAPACITANCE (pF) MAX3225/MAX3227 SLEW RATE vs ...

Page 6

... SLEW RATE vs. LOAD CAPACITANCE TRANSMITTER AT 1Mbps 2 TRANSMITTERS AT 62.5kbps 0 0 400 800 1200 1600 LOAD CAPACITANCE (pF) MAX3245 TRANSMITTER SKEW vs. LOAD CAPACITANCE 1000 2000 LOAD CAPACITANCE (pF) 120kbps 20kbps 3000 4000 5000 2000 3000 Maxim Integrated ...

Page 7

... The charge pump operates in discontinuous mode: if the output voltages are less Maxim Integrated NAME Ready to Transmit Output, Active High. READY is enabled high when — READY V- goes below -4V and the device is ready to transmit ...

Page 8

... UART and interface are shut down PROTECTION DIODE PREVIOUS UART Tx GND SHDN = GND LOGIC μP TRANSITION DETECTOR MAX3244 I MAX3245 PROTECTION DIODE R2OUTB R2OUT THREE-STATED UART T1IN Tx GND FORCEOFF = GND RS-232 5kΩ R2IN 5kΩ T1OUT Maxim Integrated ...

Page 9

... This is ideal for sys- tems where V is set to ground in shutdown to CC accommodate peripherals such as UARTs (Figure 2). AutoShutdown is a trademark of Maxim Integrated Products, Inc. Maxim Integrated RECEIVER OR VALID TRANSMITTER RECEIVER EDGE WITHIN ...

Page 10

... The time required to exit shutdown is typically 100µs (Figure 6). EDGE FORCEOFF DETECT S 30sec TIMER EDGE DETECT R FORCEON FORCEOFF FORCEON AUTOSHDN INVALID HIGH +2.7V INDETERMINATE +0.3V 0 INVALID LOW -0.3V INDETERMINATE -2.7V INVALID HIGH , V- is pulled to ground, the transmit- CC AUTOSHDN POWERDOWN* Maxim Integrated ...

Page 11

... Figure 5 shows a circuit that forces the transmitters on for 100ms, allowing enough time for the other system to realize that the MAX3244/ MAX3245 is awake. If the other system outputs valid RS-232 signal transitions within that time, the RS-232 ports on both systems remain enabled. Maxim Integrated t INVH t AUTOSHDN t ...

Page 12

... CAN BE RETURNED TO V 0.1 0.33 Figure 7. Loopback Test Circuit 3.3V CC C1–C4 = 0.1μF 5μs/div BYPASS MAX3224 C1- MAX3225 C2+ MAX3226 V- MAX3227 C2 C2- MAX3244 MAX3245 OUT OUT 5kΩ FORCEON V FORCEOFF CC GND OR GND. CC FORCEON = FORCEOFF T1OUT T2OUT READY C3* C4 1000pF Maxim Integrated ...

Page 13

... V = 3.3V CC 2μs/div Figure 9. MAX3224/MAX3226/MAX3244 Loopback Test Result at 250kbps Maxim Integrated High Data Rates The MAX3225/MAX3227/MAX3245 maintain the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps (MegaBaud). Figure 10 shows a loopback test result with a single transmitter driven at 1Mbps and all transmitters loaded with an RS-232 receiver in paral- lel with 250pF ...

Page 14

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

Page 15

... MAX3224 +3.0 to +5.5 MAX3225 +3.0 to +5.5 MAX3221 +3.0 to +5.5 MAX3226 +3.0 to +5.5 MAX3227 +3.0 to +5.5 Maxim Integrated The MAX3224–MAX3227/MAX3244/MAX3245 can directly interface with various 5V logic families, includ- ing ACT and HCT CMOS. See Table 4 for more informa- tion on possible combinations of interconnections. Table 5 lists other Maxim 3.0V to 5.5V powered trans- ceivers. SUPPLY (V) 3.3 Compatible with all CMOS families ...

Page 16

... T1IN T1OUT 9 14 T2IN T2OUT 10 13 T3IN 12 T3OUT 11 FORCEOFF 22 INVALID 21 AUTOSHUTDOWN FORCEON 23 PLUS R2OUTB 20 R1OUT R1IN 4 19 5kΩ R2OUT R2IN 5 18 5kΩ R3OUT R3IN 6 17 5kΩ R4OUT 16 R4IN 7 5kΩ R5OUT 15 R5IN 8 5kΩ GND 0.1μ 0.1μF Maxim Integrated ...

Page 17

... V+ 3 C1- 4 C2 T2OUT 8 R2IN 9 R2OUT 10 DIP/SSOP/TSSOP 15 GND FORCEOFF 18 READY *CONNECT EP TO GND. Maxim Integrated 20 FORCEOFF GND 18 T1OUT 17 MAX3224 R1IN 16 MAX3225 R1OUT 15 FORCEON 14 13 T1IN T2IN 12 INVALID T2IN INVALID 9 8 R2OUT ...

Page 18

... SO (W) 28 SSOP 28 SO (W) 28 SSOP 28 SO (W) 28 SSOP Chip Information Package Information PACKAGE OUTLINE LAND CODE NO. PATTERN NO. A16+2 21-0056 90-0106 A20+2 21-0056 90-0094 T2055+5 21-0140 90-0010 U20+2 21-0066 90-0116 P20+3 21-0043 — W28+6 21-0042 90-0109 A28+1 21-0056 90-0095 Maxim Integrated ...

Page 19

... 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, 18 ...

Related keywords