MAX3388EEUG+ Maxim Integrated Products, MAX3388EEUG+ Datasheet

IC TXRX RS232 250KBPS 24-TSSOP

MAX3388EEUG+

Manufacturer Part Number
MAX3388EEUG+
Description
IC TXRX RS232 250KBPS 24-TSSOP
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX3388EEUG+

Number Of Drivers/receivers
3/3
Protocol
RS232
Voltage - Supply
3 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
24-TSSOP
Propagation Delay Time Ns
0.15 us
Operating Supply Voltage
2.35 V to 3 V
Supply Current
0.3 mA
Operating Temperature Range
- 40 C to + 85 C
Data Rate
460 Kbps
Mounting Style
SMD/SMT
Number Of I/os
3 / 2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3388E/MAX3389E are 2.5V-powered EIA/TIA-
232 and V.28/V.24 communications interfaces with low
power requirements, high data-rate capabilities, and
enhanced electrostatic discharge (ESD) protection. The
MAX3388E/MAX3389E have two receivers and three
transmitters. All RS-232 inputs and outputs are protected
to ±15kV using the IEC 1000-4-2 Air-Gap Discharge
method, ±8kV using the IEC 1000-4-2 Contact Discharge
method, and ±15kV using the Human Body Model.
In addition to the traditional RS-232 I/O, these devices have
dedicated logic-level I/O pins for additional device-to-
device handshaking. During shutdown the logic-level I/O
pins are active for the MAX3389E. An internal 62Ω switch is
provided to switch power to external circuitry or modules.
A proprietary low-dropout transmitter output stage
enables RS-232 compatible performance from a +2.35V
to +3.0V supply with a dual charge pump. The charge
pump requires only four small 0.1µF capacitors for oper-
ation from a +2.5V supply. The MAX3388E/MAX3389E
are capable of running at data rates up to 460kbps while
maintaining RS-232-compatible output levels.
The MAX3388E/MAX3389E have a unique V
allows interoperation in mixed-logic voltage systems.
Both input and output logic levels are pin programma-
ble through the V
available in a space-saving TSSOP package.
19-1845; Rev 1; 9/01
C;
4.
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.
= ±15kV ESD PROTECTION
C
BYPASS
0.1µF
0.1µF
C2
C1
+2.5V
Typical Operating Circuit
L
________________________________________________________________ Maxim Integrated Products
13
12
10 LOUT
11
pin. The MAX3388E/MAX3389E are
1
3
4
5
7
9
8
C1+
C1-
C2-
T1IN
T2IN
T3IN
SWOUT
C2+
R2OUT
R1OUT
Transceivers for PDAs and Cell Phones
General Description
24
SHDN
SHDN
MAX3388E
MAX3389E
GND
23
V
22
CC
V
V
L
L
2.5V, ±15kV ESD-Protected RS-232
14
V
L
T1OUT
T2OUT
T3OUT
30kΩ
SWIN 15
5kΩ
R1IN
R2IN
5kΩ
LIN
V+
V-
21
2
6
19
18
17
16
20
RS-232
I/O
C3
0.1µF
C4
0.1µF
L
pin that
o V
o Additional I/O for Hot-Sync Applications
o ±15kV ESD Protection on Rx Inputs, Tx Outputs,
o Low 300µA Supply Current
o Guaranteed 460kbps Data Rate
o 1µA Low-Power Shutdown
o Integrated Switch for Powering Remote Circuitry
o Flow-Through Pinout
o L
MAX3388ECUG
MAX3388EEUG
MAX3389ECUG
MAX3389EEUG
Systems
LIN, and SWIN
Subnotebook/Palmtop Computers
PDAs and PDA Cradles
Cell Phone Data Cables
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
OUT
L
Pin for Compatibility with Mixed-Voltage
TOP VIEW
PART
Active During Shutdown (MAX3389E)
SWOUT
R2OUT
LOUT
T1IN
T2IN
T3IN
C1+
C2+
C1-
C2-
V+
V-
10
11
12
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
1
2
3
4
5
6
7
8
9
0°C to +70°C
0°C to +70°C
Ordering Information
MAX3388E
MAX3389E
TSSOP
Pin Configuration
24
23
22
21
20
19
18
17
16
15
14
13
Applications
SHDN
V
GND
T1OUT
T2OUT
T3OUT
R1IN
R2IN
LIN
SWIN
V
R1OUT
CC
L
PIN-PACKAGE
24 TSSOP
24 TSSOP
24 TSSOP
24 TSSOP
Features
1

Related parts for MAX3388EEUG+

MAX3388EEUG+ Summary of contents

Page 1

... SHDN 11 SWOUT = ±15kV ESD PROTECTION GND ________________________________________________________________ Maxim Integrated Products 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 Pin for Compatibility with Mixed-Voltage L Systems o Additional I/O for Hot-Sync Applications o ±15kV ESD Protection on Rx Inputs, Tx Outputs, LIN, and SWIN o Low 300µ ...

Page 2

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. GND...................................................-0. GND ................................................................-0. GND .................................................................+0.3V to -7V V+ +V-(Note ...

Page 3

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones DC ELECTRICAL CHARACTERISTICS (continued +2.35V to +3.0V, C1–C4 = 0.1µ +25°C.) A PARAMETER SYMBOL Output Leakage Current HANDSHAKING I/O (LIN, LOUT) ...

Page 4

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones ( +2.5V +25°C, unless otherwise noted TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 5.0 2.5 DATA RATE = 460kbps LOAD = 3kΩ IN ...

Page 5

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones PIN NAME 1 C1+ Positive Terminal of the Voltage-Doubler Charge-Pump Capacitor 2 V+ +4.2V Supply Generated by the Charge Pump 3 C1- Negative Terminal of the Voltage-Doubler Charge-Pump Capacitor 4 ...

Page 6

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones Table 1. Shutdown Logic Truth Table RECEIVER SHDN O U TPU T S OUTPUTS L High-Z High-Z H Active Active POWER- MANAGEMENT SHDN ...

Page 7

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones shutdown is typically 30µs, as shown in Figure 2. Connect SHDN the shutdown mode is not used shutdown mode, the receiver outputs are high imped- ...

Page 8

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones 50MΩ to 100MΩ 330Ω CHARGE-CURRENT DISCHARGE LIMIT RESISTOR RESISTANCE HIGH STORAGE VOLTAGE 150pF CAPACITOR DC SOURCE Figure 4a. IEC 1000-4-2 ESD Test Model I ...

Page 9

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones The MAX3388E/MAX3389E maintain RS-232-compatible transmitter output voltages even at high data rates. Figure 5 shows a transmitter loopback test circuit. Figure 6 shows a loopback test result at 250kbps, and ...

Page 10

ESD-Protected RS-232 Transceivers for PDAs and Cell Phones T1IN T1OUT R1OUT C = 150pF L 1µs/div Figure 7. Loopback Test Results at 460kbps 10 ______________________________________________________________________________________ the phone. The receiver outputs will sink to zero for low outputs, but ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________11 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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