MAX13448EESD+ Maxim Integrated Products, MAX13448EESD+ Datasheet

IC TXRX RS485 FULL DUPLEX 14SOIC

MAX13448EESD+

Manufacturer Part Number
MAX13448EESD+
Description
IC TXRX RS485 FULL DUPLEX 14SOIC
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX13448EESD+

Number Of Drivers/receivers
1/1
Protocol
RS485
Voltage - Supply
3 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Operating Supply Voltage
3 V to 5 V
Supply Current
15 mA
Operating Temperature Range
- 40 C to + 85 C
Data Rate
0.5 Mbps
Mounting Style
SMD/SMT
Propagation Delay Time Ns
700 ns
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX13448E full-duplex RS-485 transceiver fea-
tures inputs and outputs fault protected up to ±80V
(with respect to ground). The device operates from a
+3.0V to +5.5V supply and features true fail-safe cir-
cuitry, guaranteeing a logic-high receiver output when
the receiver inputs are open or shorted. This enables all
receiver outputs on a terminated bus to output logic-
high when all transmitters are disabled.
The MAX13448E features a slew-rate limited driver that
minimizes EMI and reduces reflections caused by
improperly terminated cables, allowing error-free data
transmission at data rates up to 500kbps with a +5V
supply, and 250kbps with a +3.3V supply.
The MAX13448E includes a hot-swap capability to elimi-
nate false transitions on the bus during power-up or hot
insertion. The driver and receiver feature active-high and
active-low enables, respectively, that can be connected
together externally to serve as a direction control.
The MAX13448E features an 1/8-unit load receiver input
impedance, allowing up to 256 transceivers on the bus.
All driver outputs are protected to ±8kV ESD using the
Human Body Model. The MAX13448E is available in a
14-pin SO package and operates over the extended
-40°C to +85°C temperature range.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-4098; Rev 0; 5/08
Industrial Control Systems
HVAC Control systems
Utility Meters
Motor Driver Control Systems
GND
GND
N.C.
RO
RE
DE
DI
1
2
3
4
5
6
7
+
________________________________________________________________ Maxim Integrated Products
General Description
SO
D
R
14
13
12
11
10
9
8
Applications
±80V Fault-Protected Full-Duplex
V
N.C.
A
B
Z
Y
N.C.
CC
MAX13448E
N.C.
RO
DI
1, 8,
13
5
2
3
4 14
RE
DE
D
R
V
CC
6, 7
GND
9
10
12
11
o ±80V Fault Protection on the RS-485 I/O Ports
o True Fail-Safe Receiver
o Hot-Swap Input Structure on DE
o ESD Protection on the RS-485 I/O Ports
o Slew-Rate Limiting Facilitates Error-Free Data
o 1/8-Unit Load Allows Up to 256 Transceivers on
o -7V to +12V Common-Mode Input Voltage Range
o +3.0V to +5.5V Operating Supply Voltage
o Available in 14-Pin SO Package
+ Denotes a lead-free package.
Pin Configuration appears at end of data sheet.
MAX13448EESD+
Transmission
the Bus
Y
B
Z
A
±8kV Human Body Model
1μF
PART
RS-485 Transceiver
R
t
-40°C to +85°C
TEMP RANGE
Ordering Information
Functional Diagram
R
t
GND
V
CC
R
RE
DE
D
PIN-PACKAGE
14 SO
Features
RO
DI
1

Related parts for MAX13448EESD+

MAX13448EESD+ Summary of contents

Page 1

... Slew-Rate Limiting Facilitates Error-Free Data Transmission o 1/8-Unit Load Allows Up to 256 Transceivers on the Bus o -7V to +12V Common-Mode Input Voltage Range o +3.0V to +5.5V Operating Supply Voltage o Available in 14-Pin SO Package PART MAX13448EESD+ + Denotes a lead-free package. Applications Pin Configuration appears at end of data sheet MAX13448E DE ...

Page 2

Fault-Protected Full-Duplex RS-485 Transceiver ABSOLUTE MAXIMUM RATINGS (All voltages reference to GND.) Supply Voltage (V ).............................................................+6V CC Control Input Voltage (RE, DE)...................-0. Driver Input Voltage (DI).............................-0. Receiver Input Voltage (A, B (Note 1)) ................................±80V Driver ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +3.0 to +5.5V MIN MAX PARAMETER SYMBOL RECEIVER Input Current Receiver Differential Threshold Voltage Receiver Input Hysteresis Output High Voltage Output Low Voltage Three-State Output Current at Receiver ...

Page 4

Fault-Protected Full-Duplex RS-485 Transceiver SWITCHING CHARACTERISTICS ( unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Driver Disable Time from Output High Driver Enable Time from t DZH(SHDN) Shutdown ...

Page 5

SWITCHING CHARACTERISTICS ( unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ver E nab Outp ...

Page 6

Fault-Protected Full-Duplex RS-485 Transceiver (V = +3.3V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 4. LOW HIGH DI = FLOATING 4.15 4.10 4.05 -40 -15 10 ...

Page 7

T = +25°C, unless otherwise noted SINGLE-ENDED DRIVER OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT 3. HIGH DI = HIGH 3.30 3.25 3.20 3.15 3. OUTPUT ...

Page 8

Fault-Protected Full-Duplex RS-485 Transceiver PIN NAME N.C. No Connection. Not internally connected. Connect N.C. to GND or leave it unconnected. Receiver Output. If receiver is enabled and ( ≥ -50mV high; if ...

Page 9

OR V GENERATOR DZH DZH(SHDN) OUT Figure 4. Driver Enable and Disable Times ( GENERATOR DZL DZL(SHDN OUT V OL Figure 5. Driver Enable and Disable ...

Page 10

Fault-Protected Full-Duplex RS-485 Transceiver Figure 6. Receiver Propagation Delays +1.5V -1.5V S1 OPEN S2 CLOSED S3 = +1. OPEN S2 CLOSED S3 = +1. ...

Page 11

Fault-Protected Full-Duplex Detailed Description The MAX13448E ±80V fault-protected RS-485/RS-422 transceiver contains one driver and one receiver. This device features fail-safe circuitry, guaranteeing a logic- high receiver output when the receiver inputs are open or shorted, or when they are ...

Page 12

Fault-Protected Full-Duplex RS-485 Transceiver 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 8a. Human Body ESD Test Model receiver threshold between -50mV and -200mV. If the ...

Page 13

V CC 10μs TIMER SR LATCH TIMER 5kΩ DE 100μA 500μ Figure 9. Simplified Structure of the Driver Enable Pin (DE) Hot-Swap Input Circuitry The enable inputs feature hot-swap capability. At the input there are two NMOS devices, ...

Page 14

... 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products 120Ω ...

Related keywords