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Электронный компонент: MAX3223ECPP

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General Description
The MAX3221E/MAX3223E/MAX3243E are 3V-powered
EIA/TIA-232 and V.28/V.24 communications interfaces
with automatic shutdown/wakeup features, high data-
rate capabilities, and enhanced electrostatic discharge
(ESD) protection. All transmitter outputs and receiver
inputs are protected to 15kV using IEC 1000-4-2 Air-
Gap Discharge, to 8kV using IEC 1000-4-2 Contact
Discharge, and to 15kV using the Human Body Model.
The MAX3221E/MAX3223E/MAX3243E achieve a
1A supply current with Maxim's revolutionary
AutoShutdownTM feature. They save power without
changes to the existing BIOS or operating system by enter-
ing low-power shutdown mode when the RS-232 cable is
disconnected, or when the transmitters of the connected
peripherals are off.
The transceivers have a proprietary low-dropout trans-
mitter output stage, delivering true RS-232 performance
from a +3.0V to +5.5V supply with a dual charge pump.
The charge pump requires only four small 0.1F capaci-
tors for operation from a +3.3V supply. Each device is
guaranteed to run at data rates of 250kbps while main-
taining RS-232 output levels.
The MAX3221E contains just one driver and one receiver,
making it the smallest single-supply RS-232 transceiver.
The MAX3223E has two drivers and two receivers. The
MAX3243E is a complete 3-driver/5-receiver serial port
ideal for notebook or subnotebook computers. It also
includes two noninverting receiver outputs that are always
active, allowing external devices to be monitored without
forward biasing the protection diodes in circuitry that may
be powered down.
The MAX3221E, MAX3223E, and MAX3243E are avail-
able in space-saving SSOP packages.
Applications
Notebook, Subnotebook, and Palmtop Computers
Cellular Phones
Battery-Powered Equipment
Hand-Held Equipment
Peripherals
Printers
Features
o
ESD Protection for RS-232 I/O Pins:
15kV--Human Body Model
8kV--IEC1000-4-2, Contact Discharge
15kV--IEC1000-4-2, Air-Gap Discharge
o
Latchup Free
o
1A Supply Current
o
250kbps Guaranteed Data Rate
o
6V/s Guaranteed Slew Rate
o
Meets EIA/TIA-232 Specifications Down to 3.0V
o
Smallest Single-Supply RS-232 Transceiver
(MAX3221E)
o
Guaranteed Mouse Driveability (MAX3243E)
o
Small 0.1F Capacitors
MAX3221E/MAX3223E/MAX3243E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
________________________________________________________________
Maxim Integrated Products
1
19-1283; Rev 2; 1/98
PART
MAX3221E
CAE
MAX3221EEAE
-40C to +85C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
16 SSOP
16 SSOP
AutoShutdown is a trademark of Maxim Integrated Products.
Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; 5,649,210; and other patents pending.
Pin Configurations appear at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
MAX3223EEPP
-40C to +85C
20 Plastic DIP
MAX3223EEAP
-40C to +85C
20 SSOP
MAX3243E
CWI
0C to +70C
28 Wide SO
MAX3243ECAI
0C to +70C
28 SSOP
MAX3243EEWI
-40C to +85C
28 Wide SO
MAX3243EEAI
-40C to +85C
28 SSOP
MAX3223E
CPP
MAX3223ECAP
0C to +70C
0C to +70C
20 Plastic DIP
20 SSOP
Ordering Information
Selector Guide
MAX3221E
MAX3223E
MAX3243E
1/1
2/2
3.0 to 5.5
3.0 to 5.5
3.0 to 5.5
3/5
PART
NO. OF
DRIVERS/
RECEIVERS
V
CC
RANGE
(V)
AUTOSHUTDOWN
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX3221E/MAX3223E/MAX3243
E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, C1C4 = 0.1F (Note 2), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
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.
V
CC
to GND ..............................................................-0.3V to +6V
V+ to GND (Note 1) ..................................................-0.3V to +7V
V- to GND (Note 1) ...................................................+0.3V to -7V
V+ +
|
V-
|
(Note 1) .................................................................+13V
Input Voltages
T_IN, EN, FORCEON, FORCEOFF to GND ............-0.3V to +6V
R_IN to GND ......................................................................25V
Output Voltages
T_OUT to GND................................................................13.2V
R_OUT, R2OUTB, INVALID to GND .........-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
T_OUT to GND .........................................................Continuous
Continuous Power Dissipation (T
A
= +70C)
16-Pin SSOP (derate 7.14mW/C above +70C) ...........571mW
20-Pin Plastic DIP (derate 11.11mW/C above +70C)....889mW
20-Pin SSOP (derate 8.00mW/C above +70C) ...........640mW
28-Pin Wide SO (derate 12.50mW/C above +70C)............1W
28-Pin SSOP (derate 9.52mW/C above +70C)............762mW
Operating Temperature Ranges
MAX32_ _EC_ _ ....................................................0C to +70C
MAX32_ _EE_ _..................................................-40C to +85C
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
Note 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
V
CC
= 5.0V
RECEIVER OUTPUTS
AUTOSHUTDOWN (
FORCEON = GND, FORCEOFF = V
CC
)
LOGIC INPUTS
DC CHARACTERISTICS
(V
CC
= 3.3V or 5.0V, T
A
= +25C)
R_OUT receivers disabled
Output Leakage Current
0.05
10
A
Negative threshold
Positive threshold
Figure 5a
V
CC
= 3.3V
T_IN, EN, FORCEON,
FORCEOFF
CONDITIONS
I
OUT
= -1.0mA
I
OUT
= 1.6mA
Figure 5a
I
OUT
= -1.0mA
I
OUT
= 1.6mA
T_IN, EN, FORCEON, FORCEOFF
FORCEON = FORCEOFF = V
CC
,
no load
FORCEOFF = GND
FORCEON = GND,
FORCEOFF = V
CC,
all R_IN open
V
CC
- 0.6
V
INVALID Output Voltage High
-0.3
0.3
V
Receiver Input Threshold to
INVALID Output Low
0.4
V
INVALID Output Voltage Low
-2.7
V
Receiver Input Threshold to
INVALID Output High
2.7
0.3
1
mA
Supply Current,
AutoShutdown Disabled
1.0
10
A
Supply Current, Shutdown
Supply Current, AutoShutdown
2.0
PARAMETER
MIN
TYP
MAX
UNITS
Input Logic Threshold Low
0.8
V
1.0
10
A
Input Logic Threshold High
2.4
V
Output Voltage Low
0.4
V
Output Voltage High
V
CC
- 0.6
V
CC
- 0.1
V
SYMBOL
Transmitter Input Hysteresis
0.5
V
T_IN, EN, FORCEON, FORCEOFF
Input Leakage Current
0.01
1
A
kV
MAX3221E/MAX3223E/MAX3243
E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, C1C4 = 0.1F (Note 2), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
MIN
TYP
MAX
UNITS
25
Output Short-Circuit Current
60
mA
Output Resistance
300
10M
Output Leakage Current
A
Input Threshold Low
0.6
1.2
V
5
5.4
Output Voltage Swing
V
CONDITIONS
V
CC
= V+ = V- = 0, T
OUT
= 2V
V
OUT
= 12V, V
CC
= 0 or 3V to
5.5V, transmitters disabled
All transmitter outputs loaded with
3k
to ground
Receiver Positive or Negative
Threshold to INVALID High
1
s
V
CC
= 5V, Figure 5b
Input Hysteresis
0.5
V
Input Threshold High
V
Input Resistance
3
5
7
k
0.8
1.5
1.8
2.4
1.5
2.4
T
A
= +25C
T
A
= +25C
5.0
Transmitter Output Voltage
V
T1IN = T2IN = GND, T3IN = V
CC
,
T3OUT loaded with 3k
to GND,
T1OUT and T2OUT loaded with
2.5mA each
t
INVH
SYMBOL
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
15
IEC 1000-4-2 Air-Gap Discharge
Receiver Positive or Negative
Threshold to INVALID Low
30
s
V
CC
= 5V, Figure 5b
t
INVL
Input Voltage Range
-25
25
V
Receiver or Transmitter Edge to
Transmitters Enabled
100
s
V
CC
= 5V, Figure 5b
t
WU
Input Voltage Range
-25
25
V
8
IEC 1000-4-2 Contact Discharge
R_IN, T_OUT
15
Human Body Model
kV
RECEIVER INPUTS
TRANSMITTER OUTPUTS
MOUSE DRIVEABILITY (MAX3243E)
ESD PROTECTION
Typical Operating Characteristics
(V
CC
= +3.3V, 250kbps data rate, 0.1F capacitors, all transmitters loaded with 3k
and C
L
, T
A
= +25C, unless otherwise noted.)
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
0
1000
2000
3000
4000
5000
MAX3221E/MAX3223E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3221E-01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
V
OUT+
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
V
OUT-
0
2
4
6
8
10
12
14
16
0
1000
2000
3000
4000
5000
MAX3221E/MAX3223E
SLEW RATE vs. LOAD CAPACITANCE
MAX3221-TOC2
LOAD CAPACITANCE (pF)
SLEW RATE (V/
s)
-SLEW
+SLEW
FOR DATA RATES UP TO 250kbps
MAX3221E/MAX3223E/MAX3243
E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS--MAX3221E/MAX3223E/MAX3243E
(V
CC
= +3.0V to +5.5V, C1C4 = 0.1F (Note 2), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
Note 2:
C1C4 = 0.1F, tested at 3.3V 10%. C1 = 0.047F, C2C4 = 0.33F, tested at 5.0V 10%.
Note 3:
Transmitter skew is measured at the transmitter zero cross points.
t
PLH
R
L
= 3k
, C
L
= 1000pF,
one transmitter switching
t
PHL
SYMBOL
t
PHL
- t
PLH
t
PHL
- t
PLH
Receiver Output Disable Time
ns
4
30
CONDITIONS
C
L
= 150pF to
2500pF
s
0.15
Receiver Propagation Delay
C
L
= 150pF to
1000pF
kbps
UNITS
MIN
TYP
MAX
PARAMETER
(Note 3)
ns
50
Receiver Skew
ns
100
Transmitter Skew
V
CC
= 3.3V,
R
L
= 3k
to 7k
,
T
A
= +25C,
measured from
+3V to -3V or
-3V to +3V
V/s
Transition-Region Slew Rate
6
30
C
L
= 150pF
250
0.15
Maximum Data Rate
ns
Normal operation
Receiver Output Enable Time
200
Normal operation
200
MAX3221E/MAX3223E/MAX3243
E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, 250kbps data rate, 0.1F capacitors, all transmitters loaded with 3k
and C
L
, T
A
= +25C, unless otherwise noted.)
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
0
MAX3243E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3224E-04
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
2000
3000
1000
4000
5000
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
V
OUT+
V
OUT-
0
4
2
8
6
12
10
14
0
1000
2000
3000
4000
5000
MAX3243E
SLEW RATE vs. LOAD CAPACITANCE
MAX3243E-05
LOAD CAPACITANCE (pF)
SLEW RATE (V/
s)
0
30
20
10
40
50
60
0
2000
1000
3000
4000
5000
MAX3243E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3243E-06
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
250kbps
120kbps
20kbps
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
0
5
10
15
20
25
30
35
40
45
0
2000
1000
3000
4000
5000
MAX3221E/MAX3223E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3224E-03
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
250kbps
120kbps
20kbps
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps