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_______________General Description
The MAX3316EMAX3319E are 2.5V powered RS-232
compatible transceivers. These devices feature shut-
down (MAX3317E), AutoShutdown PlusTM (MAX3318E/
MAX3319E), and enhanced electrostatic discharge
(ESD) protection integrated into the chip. All transmitter
outputs and receiver inputs 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.
All devices are guaranteed at a data rate of 460kbps.
The transceivers have a proprietary low-dropout trans-
mitter output stage enabling RS-232 compatible opera-
tion from a +2.25V to +3.0V supply with a dual charge
pump. The charge pump requires only four 0.1F
capacitors. The MAX3318E/MAX3319E feature a logic-
level output (READY) that asserts when the charge
pump is regulating and the device is ready to begin
transmitting.
The MAX3318E/MAX3319E achieve a 1A supply current
using Maxim's revolutionary AutoShutdown Plus feature.
These devices automatically enter a low-power shut-
down mode when the RS-232 cable is disconnected or
the transmitters of the connected peripherals are inactive
for more than 30 seconds. They turn on again when
they sense a valid transition at any transmitter or receiver
input. AutoShutdown Plus saves power without
changes to the existing BIOS or operating system. The
MAX3317E also features a 1A shutdown mode that
can be entered by driving SHDN low. The MAX3317E's
receivers remain active while in shutdown mode, allowing
external devices such as modems to be monitored
using only 1A supply current.
These devices are available in space-saving packages:
MAX3316E (16-pin SSOP and 20-pin TSSOP), MAX3317E/
MAX3318E (20-pin SSOP and 20-pin TSSOP), and
MAX3319E (16-pin SSOP).
________________________Applications
Palmtop Computers
Hand-Held Instruments
Pagers
Cellular Phones
GPS
Handy Terminals
Hand-Held Electronic Books
____________________________Features
o ESD Protection for RS-232 I/O Pins
15kV--Human Body Model
8kV--IEC 1000-4-2, Contact Discharge
15kV--IEC 1000-4-2, Air-Gap Discharge
o 300A Operating Supply Current
o 1A Low-Power Shutdown with Receivers Active
o Guaranteed 460kbps Data Rate
o Guaranteed 4V/s Slew Rate
o RS-232 Compatible Down to 2.25V
MAX3316EMAX3319E
15kV ESD-Protected, 2.5V, 1A, 460kbps,
RS-232 Compatible Transceivers
________________________________________________________________ Maxim Integrated Products
1
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
FORCEOFF
V
CC
GND
T1OUT
C1-
V+
C1+
READY
R1IN
R1OUT
FORCEON
T1IN
T2OUT
V-
C2-
C2+
12
11
9
10
T2IN
INVALID
R2OUT
R2IN
MAX3318E
SSOP/TSSOP
Pin Configurations
19-1616; Rev 0; 1/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Ordering Information
Selector Guide and Typical Application Circuits appear at
end of data sheet.
AutoShutdown Plus is a trademark of Maxim Integrated Products.
PART
MAX3316ECUP
0C to +70C
TEMP. RANGE
PIN-PACKAGE
20 TSSOP
MAX3316ECAE
0C to +70C
16 SSOP
MAX3316EEUP
-40C to +85C
20 TSSOP
MAX3316EEAE
-40C to +85C
16 SSOP
MAX3317ECUP
0C to +70C
20 TSSOP
MAX3317ECAP
0C to +70C
20 SSOP
MAX3317EEUP
-40C to +85C
20 TSSOP
MAX3317EEAP
-40C to +85C
20 SSOP
MAX3318ECUP
0C to +70C
20 TSSOP
MAX3318ECAP
0C to +70C
20 SSOP
MAX3318EEUP
-40C to +85C
20 TSSOP
MAX3318EEAP
-40C to +85C
20 SSOP
MAX3319ECAE
0C to +70C
16 SSOP
MAX3319EEAE
-40C to +85C
16 SSOP
Pin Configurations continued at end of data sheet.
15kV ESD-Protected, 2.5V, 1A, 460kbps,
RS-232 Compatible Transceivers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.25V to +3.0V, C1C4 = 0.1F, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +2.5V,
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) ...................................................-7V to +0.3V
V+ + |V-| (Note 1) .................................................................+13V
Input Voltages
T_IN, EN, SHDN, FORCEON,
FORCEOFF to GND ...............................................-0.3V to +6V
R_IN to GND ..................................................................25V
Output Voltages
T_OUT to GND............................................................13.2V
R_OUT, INVALID, READY 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 SSOP (derate 8.00mW/C above +70C) .......640mW
20-Pin TSSOP (derate 7.00mW/C above +70C) .....559mW
Operating Temperature Range
MAX331_EC_ _ .................................................0C to +70C
MAX331_EE_ _ ..............................................-40C to +85C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
SHDN = GND (MAX3317E); FORCEOFF =
GND (MAX3318E/MAX3319E)
All transmitter outputs loaded with 3k
to
ground
FORCEON = GND, FORCEOFF = V
CC
,
all R_IN idle, all T_IN idle
(MAX3318E/MAX3319E)
T
A
= +25C
T
A
= +25C
T
A
= +25C
EN = V
CC
(MAX3317E), receivers disabled
T_IN, EN, SHDN, FORCEON, FORCEOFF
SHDN = V
CC
, no load (MAX3317E);
FORCEON = FORCEOFF = V
CC
, no load
(MAX3318E/MAX3319E)
T_IN, EN, SHDN, FORCEON, FORCEOFF
I
OUT
= -0.5mA
T_IN, EN, SHDN, FORCEON, FORCEOFF
I
OUT
= 0.5mA
CONDITIONS
V
3.7
4
Output Voltage Swing
k
3
5
7
Input Resistance
V
0.3
Input Hysteresis
V
0.7
V
CC
Input Threshold High
V
0.3
V
CC
Input Threshold Low
V
-25
+25
Input Voltage Range
V
0.9
V
CC
Output Voltage High
V
0.1
V
CC
Output Voltage Low
A
1
10
Shutdown Supply Current
A
1
10
AutoShutdown Plus Supply
Current
A
0.05
10
Output Leakage Current
A
0.01
1
Input Leakage Current
V
0.3
Transmitter Input Hysteresis
mA
0.3
1
Supply Current
V
0.3
V
CC
Input Logic Threshold Low
V
0.7
V
CC
Input Logic Threshold High
UNITS
MIN
TYP
MAX
SYMBOL
LOGIC INPUTS
RECEIVER OUTPUTS
RECEIVER INPUTS
MAX3316EMAX3319E
PARAMETER
DC CHARACTERISTICS (V
CC
= +2.5V, T
A
= +25C)
TRANSMITTER OUTPUTS
MAX3316EMAX3319E
15kV ESD-Protected, 2.5V, 1A, 460kbps,
RS-232 Compatible Transceivers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.25V to +3.0V, C1C4 = 0.1F, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +2.5V,
T
A
= +25C.)
TIMING CHARACTERISTICS
(V
CC
= +2.25V to +3.0V, C1C4 = 0.1F, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +2.5V,
T
A
= +25C.)
V
CC
= 0 or 2.25V to 3.0V, V
OUT
= 12V,
transmitters disabled
V
CC
= 0, transmitter output = 2V
CONDITIONS
A
25
Output Leakage Current
mA
25
60
Output Short-Circuit Current
300
10M
Output Resistance
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
CC
= 2.5V, Figure 4b
I
OUT
= -0.5mA
I
OUT
= 0.5mA
Figure 4a
Figure 4a
s
1
t
INVH
Receiver Positive or Negative
Threshold to INVALID High
V
0.9
V
CC
INVALID, READY Output
Voltage High
V
0.1
V
CC
INVALID, READY Output
Voltage Low
V
-0.3
0.3
Receiver Input Threshold to
INVALID Output Low
-2.7
V
2.7
Receiver Input Threshold to
INVALID Output High
Positive threshold
V
CC
= 2.5V, Figure 4b (Note 2)
V
CC
= 2.5V, Figure 4b (Note 2)
V
CC
= 2.5V, Figure 4b
Negative threshold
s
15
30
60
t
AUTO-
SHDN
Receiver or Transmitter Edge to
Transmitters Shutdown
s
100
t
WU
Receiver or Transmitter Edge to
Transmitters Enabled
s
30
t
INVL
Receiver Positive or Negative
Threshold to INVALID Low
R_IN to R_OUT, C
L
= 150pF
R
L
= 3k
, C
L
= 1000pF, one transmitter
switching
Normal operation (MAX3317E)
Normal operation (MAX3317E)
(Note 3)
CONDITIONS
0.175
t
PLH
s
0.175
t
PHL
kbps
460
Maximum Data Rate
Receiver Propagation Delay
ns
250
Receiver Output Enable Time
ns
250
Receiver Output Disable Time
ns
100
|t
PHL
- t
PLH
|
Transmitter Skew
ns
50
|t
PHL
- t
PLH
|
Receiver Skew
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
AutoShutdown Plus (FORCEON = GND, FORCEOFF = V
CC
) (MAX3318E/MAX3319E)
ESD PROTECTION
R_IN, T_OUT
15
kV
15
8
Human Body Model
IEC 1000-4-2 Air-Gap Discharge method
IEC 1000-4-2 Contact Discharge method
MAX3316EMAX3319E
15kV ESD-Protected, 2.5V, 1A, 460kbps,
RS-232 Compatible Transceivers
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= +2.5V, C1C4 = 0.1F, 460kbps data rate, all transmitters loaded with 3k
, T
A
= +25C, unless otherwise noted.)
0
2
6
4
8
10
2.25
2.65
2.45
2.85
3.05
3.25
3.45
3.65
MAX3316E/MAX3317E
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3316E TOC01
V
CC
(V)
SUPPLY CURRENT (mA)
T1 TRANSMITTING AT SPECIFIED
DATA RATE
T2 TRANSMITTING AT 20kbps
C
L
= 1000pF
460kbps
230kbps
20kbps
-6
-2
-4
2
0
4
6
2.25
2.85
3.05
2.45
2.65
3.25
3.45
3.65
MAX3316E/MAX3317E
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX3316E TOC02
V
CC
(V)
TRANSMITTER OUTPUT VOLTAGE (V)
T_OUT+
T_OUT-
T1 TRANSMITTING AT 460kbps
T2 TRANSMITTING AT 20kbps
C
L
= 1000pF
-5
-2
-3
-4
-1
0
1
2
3
4
5
0
1000
2000
3000
MAX3316E/MAX3317E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3316E TOC03
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
T_OUT+
T_OUT-
T1 TRANSMITTING AT 460kbps
T2 TRANSMITTING AT 20kbps
0
2
6
4
8
10
MAX3316E/MAX3317E
SLEW RATE vs. LOAD CAPACITANCE
MAX3316E TOC04
LOAD CAPACITANCE (pF)
SLEW RATE (V/
s)
0
2000
1000
3000
-SLEW
+SLEW
FOR DATA RATES UP TO 460kps
TIMING CHARACTERISTICS (continued)
(V
CC
= +2.25V to +3.0V, C1C4 = 0.1F, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +2.5V,
T
A
= +25C.)
Note 2: A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
Note 3: Transmitter skew is measured at the transmitter zero crosspoints.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V/s
4
30
V
CC
= 2.5V, T
A
= +25C, R
L
= 3k
to 7k,
measured from +3V to -3V or -3V to +3V,
C
L
= 150pF to 2500pF
Transition-Region Slew Rate
MAX3316EMAX3319E
15kV ESD-Protected, 2.5V, 1A, 460kbps,
RS-232 Compatible Transceivers
_______________________________________________________________________________________
5
0
3
9
6
12
15
2.25
2.65
2.45
2.85
3.05
3.25
3.45
3.65
MAX3318E/MAX3319E
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3316E TOC06
V
CC
(V)
SUPPLY CURRENT (mA)
460kbps
230kbps
20kbps
T1 TRANSMITTING AT SPECIFIED
DATA RATE
T2 TRANSMITTING AT 20kbps
C
L
= 1000pF
-6
-2
-4
2
0
4
6
2.25
2.85
3.05
2.45
2.65
3.25
3.45
3.65
MAX3318E/MAX3319E
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX3316E TOC07
V
CC
(V)
TRANSMITTER OUTPUT VOLTAGE (V)
T1 TRANSMITTING AT 460kbps
T2 TRANSMITTING AT 20kbps
C
L
= 1000pF
T_OUT+
T_OUT-
-5
-2
-3
-4
-1
0
1
2
3
4
5
0
1000
2000
3000
MAX3318E/MAX3319E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3316E TOC08
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
T_OUT+
T_OUT-
T1 TRANSMITTING AT 460kbps
T2 TRANSMITTING AT 20kbps
0
2
6
4
8
10
MAX3318E/MAX3319E
SLEW RATE vs. LOAD CAPACITANCE
MAX3316E TOC09
LOAD CAPACITANCE (pF)
SLEW RATE (V/
s)
0
2000
1000
3000
-SLEW
+SLEW
FOR DATA RATES UP TO 460kbs
0
10
5
20
15
30
25
35
MAX3318E/MAX3319E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3316E TOC10
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
0
1000
2000
3000
460kbps
230kbps
20kbps
T1 TRANSMITTING AT SPECIFIED
DATA RATE
T2 TRANSMITTING AT 20kbps
Typical Operating Characteristics (continued)
(V
CC
= +2.5V, C1C4 = 0.1F, 460kbps data rate, all transmitters loaded with 3k
, T
A
= +25C, unless otherwise noted.)
0
10
5
20
15
30
25
35
MAX3316E/MAX3317E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3316E TOC05
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
0
1000
2000
3000
T1 TRANSMITTING AT SPECIFIED DATA RATE
T2 TRANSMITTING AT 20kbps
460kbps
230kbps
20kbps
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