Rainbow Electronics MAX13223E User Manual

General Description

The MAX13223E is a +3.0V to +5.5V-powered EIA/TIA­232 and V.28 communications interface with fault protec­tion on the RS-232 line interface. This allows shorts of the
transmitter outputs and receiver inputs to voltages in the
±70V range without adversely affecting the MAX13223E.

The MAX13223E achieves 1µA supply current using
Maxim’s AutoShutdown™ feature. The MAX13223E
automatically enters a low-power shutdown mode when
the RS-232 cable is disconnected or the receivers are
inactive. The device turns on again when a valid transi­tion at any receiver input is sensed. A proprietary, high­efficiency, dual charge-pump power supply and a
low-dropout transmitter combine to deliver true RS-232
performance from a single +3.0V to +5.5V supply.

The MAX13223E has two receivers and two drivers and is
guaranteed to run at data rates of 250kbps for one trans­mitter switching while maintaining RS-232 output levels.

The MAX13223E operates from input voltages ranging
from +3.0V to +5.5V and is available in a 20-pin, 6.5mm
x 4.4mm, TSSOP package. The MAX13223E is speci­fied over the -40°C to +85°C temperature range.

Applications

Automotive

Telematics Equipment

Base Stations

Utility Meters

Industrial Equipment

Telecomm Equipment

POS Terminal Equipment

Features

o ±70V Fault Protection

o +3.0V to +5.5V Supply Voltage

o Overvoltage Current Limiting

o Current Protection at Transmitter Outputs

o AutoShutdown

o 250kbps (Max) Data Rate

o Low Current Consumption in Shutdown 1µA (typ)

o Thermal Shutdown Protection

o ±8kV IEC 61000-4-2 Contact-Discharge Method

o -40°C to +85°C Operating Temperature Range

MAX13223E

±70V Fault-Protected, 3.0V to 5.5V,

2Tx/2Rx RS-232 Transceiver

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-4585; Rev 0; 4/09

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.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Typical Operating Circuit appears at end of data sheet.

Typical Operating Circuit

PART TEMP RANGE PIN-PACKAGE

MAX13223EEUP+ -40°C to +85°C 20 TSSOP

V

CC

C

BYPASS

0.1µF

V

C1

C2

TTL/CMOS

INPUTS

C1+

C1-

C2+

C2-

T1IN

T2IN

CC

MAX13223E

T1OUT

T2OUT

V+

V-

C3

C4

RS-232
OUTPUTS

TTL/CMOS

OUTPUTS

R1OUT

R2OUT

EN

FORCEON

GND

5kΩ

5kΩ

INVALID

FORCEOFF

R1IN

R2IN

RS-232
INPUTS

TO POWER­MANAGEMENT
UNIT

V

CC

MAX13223E

±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +3.0V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at V

CC

= +3.3V, TA= +25°C, unless otherwise

noted. For V

CC

= +3.0V to +3.6V, C1–C3 = 0.1µF, C4 = 1µF. For V

CC

= +4.5V to +5.5V, C1 = 47nF, C2–C3 = 330nF, C4 = 1µF.) (Note 2)

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.

(Voltages referenced to GND.)
V

CC

...................................................................... -0.3V to +7.0V

V+ ..........................................................................-0.3V to +7.0V

V- ...........................................................................+0.3V to -7.0V

V+ to V- ................................................................................+13V

Input Voltages

T1IN, T2IN, EN, FORCEON, FORCEOFF ..........-0.3V to +6.0V

R1IN, R2IN .......................................................................±70V

Output Voltages

T1OUT, T2OUT ................................................................±70V

R1OUT, R2OUT, INVALID ......................-0.3V to (V

CC

+ 0.3V)

Short-Circuit Duration

T1OUT, T2OUT.......................................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

20-Pin TSSOP (derate 13.6mW/°C above +70°C) .....1084mW

Junction-to-Case Thermal Resistance (θ

JC

) (Note 1)

20-Pin TSSOP...............................................................20°C/W

Junction-to-Ambient Thermal Resistance (θ

JA

) (Note 1)

20-Pin TSSOP............................................................73.8°C/W

Operating Temperature Range .......................... -40°C to +85°C

Junction Temperature..................................................... +150°C

Storage Temperature Range ............................ -65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

.

Supply Voltage V

Supply Current

Supply Current AutoShutdown I

Supply Current Shutdown I

LOGIC INPUTS

Input-Logic Low V

Input-Logic High V

Transmitter Input Hysteresis V

Input Leakage Current I

RECEIVER OUTPUTS

Output Leakage Current I

Output-Voltage Low V

Output-Voltage High V

INVALID OUTPUT (AutoShutdown (FORCEON = GND, FORCEOFF = VCC))

Receiver-Input Level to INVALID
Output High

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

AutoShutdown disabled (FORCEON =
FORCEOFF = V

ASD

SD

T_IN,LO

T_IN,HI

TX,INHYS

IN,LKG

RX , OU T,LK G

R X , OU T, L OIOUT

R X ,OU T , H I

V

RX_IN,

INV_HI

FORCEON = GND, FORCEOFF = VCC,
R1IN and R2IN idle, T1IN and T2IN idle

FORCEOFF = GND 1.0 10 µA

T_IN, EN, FORCEON, FORCEOFF,
V

= +3.3V to +3.6V, +5.0V to +5.5V

CC

T_IN, FORCEON,
FORCEOFF, EN

T_IN, EN, FORCEON, FORCEOFF ±0.01 ±1 µA

EN = V

CC

= 1.6mA 0.4 V

I

= -1.0mA

OUT

Figure 6a

), no load

CC

VCC = +3.3V 2.0

V

= +5.0V 2.4

CC

Positive level 2.7

Negative level -2.7

3.0 5.5 V

815mA

1.0 10 µA

0.8 V

0.5 V

±0.05 ±10 µA

V

-

CC

0.6

VCC -

0.2

V

V

V

MAX13223E

±70V Fault-Protected, 3.0V to 5.5V,

2Tx/2Rx RS-232 Transceiver

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3.0V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at V

CC

= +3.3V, TA= +25°C, unless otherwise

noted. For V

CC

= +3.0V to +3.6V, C1–C3 = 0.1µF, C4 = 1µF. For V

CC

= +4.5V to +5.5V, C1 = 47nF, C2–C3 = 330nF, C4 = 1µF.) (Note 2)

Receiver-Input Level to INVALID
Output Low

INVALID Output-Voltage Low V

INVALID Output-Voltage High V

RECEIVER INPUTS

Input-Voltage Range V

Overvoltage Threshold | V

Input Threshold Low V

Input Threshold High V

Input Resistance R

TRANSMITTER OUTPUTS

Output-Voltage Swing V

Output Resistance R

Overvoltage Protection Threshold |V

Output Short-Circuit Current I

Overvoltage Current I

Output Leakage Current in
Shutdown Mode

PROTECTION

Overvoltage Protection Range R1IN, R2IN, T1OUT, T2OUT -70 +70 V

ESD PROTECTION (Note 4)

R1IN, R2IN, T1OUT, T2OUT

All Other Pins Human Body Model ±2

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

RX_IN,

INV_LO

RX,INV_LOIOUT

RX,INV_HIIOUT

RX,IN

RX ,OV TH R

RX,LO

RX,HI

RX,INRES

TX,ROUTVCC

TX,FB

TX,SHORT

TX,IFBOUT

I

TX,LKG T_OUT = -12V, V

Figure 6a -0.3 +0.3 V

= 1.6mA 0.4 V

= -1.0mA

(Note 3) -70 +70 V

| 24 28.3 32 V

VCC = +3.3V 0.6

VCC = +5.0V 0.8

VCC = +3.3V 2.4

VCC = +5.0V 2.4

-24V < V

VCC = V+ = V- = 0 35 250

+32V < |V

RL = 3kΩ, Figure 4 ±5 ±6 V

O

| 14 19 V

T_OUT = 0 ±80 mA

V

V

T_OUT = +12V 450 900

shutdown mode

IEC 6100-4-2 Contact Discharge ±8

Human Body Model ±8

R_IN

= V+ = V- = 0, T

> V

OUT

< -V

OUT

< +24V (Note 3) 3 5 7

| < +70V 35 250

R_IN

= ±2V 300 Ω

OUT

TX,FB

TX,FB

= 0 or 3V to 5.5V in

CC

V

-

CC

0.6

6

-6

-150 -80

V

V

V

kΩ

mA

µA

kV

MAX13223E

±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver

4 _______________________________________________________________________________________

Note 2: All devices are 100% production tested at TA= +85°C. Specifications are over -40°C to +85°C and are guaranteed by design.
Note 3: Both receivers will operate over the ±70V input range. The input resistance increases with input voltage. The input resistance

will increase within 24V ≤ |VR_IN| ≤ 32V.

Note 4: Guaranteed by design, not production tested.
Note 5: Transmitter skew is measured at the transmitter zero crosspoints.
Note 6: Output recovery time is the delayed time for the transmitter to enter normal operating mode after an overvoltage condition.

TIMING CHARACTERISTICS

(VCC= +3.0V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V, TA= +25°C, unless otherwise
noted. For V

CC

= +3.0V to +3.6V, C1–C3 = 0.1µF, C4 = 1µF. For VCC= +4.5V to +5.5V, C1 = 47nF, C2–C3 = 330nF, C4 = 1µF.) (Note 2)

Maximum Data Rate DR

Receiver Positive or Negative
Threshold to INVALID High

Receiver Positive or Negative
Threshold to INVALID Low

Receiver Edge to Transmitters
Enabled

Receiver-Output Enable Time t

Receiver-Output Disable Time t

Receiver Skew |t

Transmitter Skew |t

Receiver Propagation Delay

Transmitter Propagation Delay

Transmitter Fall Time or Rise
Time

Transmitter Time to Exit
Shutdown

Output Recovery Time t

Transition-Region Slew Rate SR

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

R

= 3kΩ, CL = 1000pF, one transmitter

PRHL

PTHL

t

INVH

t

INVL

t

WU

RX,EN

RX,DIS

- t

- t

t

PRHL

t

PRLH

t

PTHL

t

PTLH

, t

t

R

F

t

SHDN

TX,REC

OUT

L

switching, Figure 1

VCC = 5V, Figure 6b 1 µs

VCC = 5V, Figure 6b 30 µs

VCC = 5V, Figure 6b 135 µs

Normal operation 200 ns

Normal operation 200 ns

|50ns

PRLH

| (Note 5) 200 ns

PTLH

CL = 150pF, Figure 4

CL = 1nF, RL = 3kΩ, Figure 3

Figure 3 0.3 µs

Figure 7 100 µs

CL = 1nF, RL = 5kΩ (Note 6) 100 µs

VCC = 3.3V, RL = 3kΩ to 7kΩ, TA = +25°C,
measured from +3V to -3V or -3V to +3V, one
transmitter switching, C

= 1nF

L

250 kbps

0.3

0.3

0.8

0.6

6 30 V/µs

µs

µs