15 kV ESD Protected, 2.7 V to 3.6 V Serial
Port Transceivers with Green Idle
Data Sheet
FEATURES
Green Idle power-saving mode
Single 2.7 V to 3.6 V power supply
Operates with 3 V logic
0.1 µF to 1 µF charge pump capacitors
Low EMI
Low power shutdown: 20 nA
Full RS-232 compliance
460 kb/s data rate
One receiver active in shutdown
(ADM3307E/ADM3311E/ADM3312E/ADM3315E)
Two receivers active in shutdown (ADM3310E)
ESD >15 kV IEC 1000-4-2 on RS-232 I/Os
ESD >15 kV IEC 1000-4-2 on CMOS and RS-232 I/Os
(ADM3307E)
Qualified for automotive applications
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
1
FUNCTIONAL BLOCK DIAGRAMS
C1
0.1µF
C2
0.1µF
V
CC
0.1µF
CERAMIC
+
10µF
TANTALUM
ENABLE
INPUT
SHUTDOWN
INPUT
T1
IN
T2
IN
CMOS
INPUTS
1
T3
IN
T4
IN
T5
IN
R1
OUT
CMOS
OUTPUTS
R2
OUT
R3
OUT
R1
R2
R3
T1
T2
T3
T4
T5
T1
OUT
T2
OUT
T3
OUT
T4
OUT
T5
OUT
R1
IN
R2
IN
R3
IN
EIA/TIA-232
INPUTS
2
EIA/TIA-232
OUTPUTS
C4
0.1µF
V+
VOLTAGE C2+
TRIPLER/
V
CC
INVERTER C3+
+3V TO ±9V
C1+
C2–
C1–
EN
SD
C3–
V–
GND
C5
0.1µF
C3
0.1µF
APPLICATIONS
Mobile phone handsets/data cables
Laptop and notebook computers
Printers
Peripherals
Modems
PDAs/Hand-Held Devices/Palmtop Computers
C1
0.1µF
C4
0.1µF
0.1µF
CERAMIC
+
10µF
TANTALUM
ENABLE
INPUT
C2
0.1µF
VOLTAGE C3+
TRIPLER/
C2+ INVERTER GND
+3V TO ±9V
C3–
V
CC
V+
C2–
EN
C1+
T1
IN
CMOS
INPUTS
1
T2
IN
T3
IN
R1
OUT
R2
OUT
CMOS
OUTPUTS
R3
OUT
R4
OUT
R5
OUT
R5
R4
R3
R2
T3
R1
T2
T1
V–
C1–
SD
C3
0.1µF
V
CC
ADM3307E
02915-001
1
INTERNAL
2
INTERNAL
400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 1.
ADM3307E
Functional Block Diagram
C1
0.1µF
C4
0.1µF
0.1µF
CERAMIC
+
C2
0.1µF
V+
VOLTAGE C3+
TRIPLER/
C2+ INVERTER GND
+3V TO ±9V
C3–
V
CC
V–
C1–
SD
T1
T2
T3
R1
R2
R3
C3
0.1µF
V
CC
C5
0.1µF
SHUTDOWN
INPUT
T1
OUT
T2
OUT
T3
OUT
R1
IN
R2
IN
R3
IN
R4
IN
R5
IN
EIA/TIA-232
INPUTS
2
EIA/TIA-232
OUTPUTS
10µF
TANTALUM
C2–
ENABLE
INPUT
EN
C1+
T1
IN
CMOS
INPUTS
1
T2
IN
T3
IN
R1
OUT
CMOS
OUTPUTS
R2
OUT
R3
OUT
C5
0.1µF
SHUTDOWN
INPUT
T1
OUT
T2
OUT
T3
OUT
R1
IN
R2
IN
R3
IN
EIA/TIA-232
INPUTS
2
EIA/TIA-232
OUTPUTS
ADM3312E/
ADM3315E
1
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
2
INTERNAL 5kΩ (22kΩ FOR ADM3315E) PULL-DOWN RESISTOR ON
02915-002
02915-003
ADM3310E/
ADM3311E
1
INTERNAL
2
INTERNAL
EACH RS-232 INPUT.
400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 2.
ADM3310E/ADM3311E
Functional Block Diagram
Figure 3.
ADM3312E/ADM3315E
Functional Block Diagram
1
Protected by U.S. Patent No. 5,606,491.
Rev. J
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Trademarks and registered trademarks are the property of their respective owners.
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagrams ............................................................. 1
Revision History ............................................................................... 2
General Description ......................................................................... 3
Specifications..................................................................................... 4
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Product Selection Guide .................................................................. 7
Pin Configurations and Function Descriptions ........................... 8
Data Sheet
Typical Performance Characteristics ........................................... 10
Circuit Description......................................................................... 13
Enable and Shutdown ................................................................ 15
Layout and Supply Decoupling ................................................ 15
ESD/EFT Transient Protection Scheme .................................. 15
ESD Testing (IEC 1000-4-2) ..................................................... 16
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 20
Automotive Products ................................................................. 20
REVISION HISTORY
6/15—Rev. I to Rev. J
Changed ADM33xxE to ADM3307E/ADM3310E/ADM3311E/
ADM3312E/ADM3315E .............................................. Throughout
Changes to ESD Testing (IEC 1000-4-2) Section ....................... 16
Changes to Figure 34 ...................................................................... 17
Changes to Ordering Guide .......................................................... 20
3/13—Rev. H to Rev. I
Changed CP-32-2 Package to CP-32-7 Package, Throughout .... 1
Changes to Figure 4, Figure 6, Figure 8 ......................................... 8
Changes to Figure 25 ...................................................................... 13
Updated Outline Dimensions ....................................................... 18
Changes to Ordering Guide .......................................................... 20
Added Automotive Products Section........................................... 20
1/06—Rev. G to Rev. H
Updated Formatting ................................................................. Universal
Updated Outline Dimensions .............................................................. 18
Changes to Ordering Guide ................................................................. 20
4/04—Rev. F to Rev. G
Changes to Ordering Guide ................................................................... 5
Updated Outline Dimensions .............................................................. 15
8/02—Rev. E to Rev. F
ADM3307E (REV. 0), ADM3311E (REV. E), and ADM3312E
(REV. A) Data Sheets Merged into REV. G of ADM33xxE Universal
ADM3310E (REV. PrA Now Prelims) and ADM3315E
(REV. PrA) Added .................................................................... Universal
Edits to Features....................................................................................... 1
Edits to Applications ............................................................................... 1
Edits to General Description ..................................................................1
Edits to Functional Block Diagrams ..................................................... 2
Edits to Specifications ...............................................................................
Edits to Absolute Maximum Ratings .................................................... 4
ADM33xx Product Selection Guide Added ......................................... 5
Added ADM3307E, ADM3310E, ADM3312E, and
ADM3315E Pin Configurations ............................................................ 6
Edits to Pin Function Descriptions ....................................................... 7
Added ADM3307E, ADM3310E, ADM3312E, and
ADM3315E Truth Tables .......................................................................7
Edits to TPCs 1–14 ..................................................................................8
TPCs 15–18 Deleted ..............................................................................10
Edits to Circuit Description Section ...................................................11
Edits to Charge Pump DC-to-DC Voltage Converter Section ........11
Edits to How Does It Work Section ....................................................11
Edits to Green Idle vs. Shutdown Section ..........................................12
Edits to Doesn’t It Increase Supply Voltage Ripple? Section ............12
Edits to What About Electromagnetic Compatibility? Section .......12
Edits to Transmitter (Driver) Section .................................................12
Edits to Receiver Section ......................................................................12
Edits to Enable and Shutdown Section ...............................................12
Edits to High Baud Rate Section..........................................................13
Edits to ESD/EFT Transient Protection Scheme ...............................13
Added Figures 8a and 8b and Renumbered the Figures
that Followed ..........................................................................................13
Edits to ESD Testing (IEC 1000-4-2) Section ....................................14
Edits to Figure 9 .....................................................................................14
Deleted Table II and Table III and replaced them with Table V .....14
Added RU-24 Package Outline Updated CP-32, RS-28
and RU-28 ...............................................................................................15
Rev. J | Page 2 of 20
Data Sheet
GENERAL DESCRIPTION
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
The
ADM3315E
is a low current version of the
ADM3312E,
with a 22 kΩ receiver input resistance that reduces the drive
requirements of the DTE. Its main applications are PDAs,
palmtop computers, and mobile phone data lump cables.
The
ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E
devices are fabricated using CMOS technology for
minimal power consumption. All parts feature a high level of
overvoltage protection and latch-up immunity.
All
ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E
devices are available in a 32-lead 5 mm × 5 mm
LFCSP_WQ and in a TSSOP (ADM3307E,
ADM3310E,
and
ADM3311E
in a 28-lead TSSOP;
ADM3312E
and
ADM3315E
in a 24-lead TSSOP). The
ADM3311E
also comes in a 28-lead
SSOP.
The
ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E
devices are ruggedized RS-232 line
drivers/receivers that operate from a single supply of 2.7 V to
3.6 V. Step-up voltage converters coupled with level shifting
transmitters and receivers allow RS-232 levels to be developed
while operating from a single supply. Features include low
power consumption, Green Idle operation, high transmission
rates, and compatibility with the EU directive on electromag-
netic compatibility. This EM compatibility directive includes
protection against radiated and conducted interference,
including high levels of electrostatic discharge.
All RS-232 (and CMOS, SD, and EN for
ADM3307E)
inputs and
outputs are protected against electrostatic discharges (up to
±15 kV). This ensures compliance with IEC 1000-4-2
requirements.
These devices are ideally suited for operation in electrically
harsh environments or where RS-232 cables are frequently
being plugged/unplugged. They are also immune to high RF
field strengths without special shielding precautions.
Emissions are also controlled to within very strict limits. CMOS
technology is used to keep the power dissipation to an absolute
minimum, allowing maximum battery life in portable
applications.
The
ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E
line of driver/receiver products is designed to fully
meet the EIA-232 standard while operating with a single 2.7 V
to 3.6 V power supply. The devices feature an on-board charge
pump dc-to-dc converter, eliminating the need for dual power
supplies. This dc-to-dc converter contains a voltage tripler and a
voltage inverter that internally generates positive and negative
supplies from the input 3 V power supply. The dc-to-dc
converter operates in Green Idle™ mode, whereby the charge
pump oscillator is gated on and off to maintain the output
voltage at ±7.25 V under varying load conditions. This
minimizes the power consumption and makes these products
ideal for battery-powered portable devices.
The
ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E
devices are suitable for operation in harsh electrical
environments and contain ESD protection up to ±15 kV on
their RS-232 lines (ADM3310E,
ADM3311E, ADM3312E,
and
ADM3315E).
The
ADM3307E
contains ESD protection up to
±15 kV on all I/O lines (CMOS, RS-232, EN, and SD).
A shutdown facility that reduces the power consumption to 66 nW
is also provided. While in shutdown, one receiver remains active
(two receivers active with
ADM3310E),
thereby allowing monitor-
ing of peripheral devices. This feature allows the device to be shut
down until a peripheral device begins communication.
The active receiver can alert the processor, which can then take
the
ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E
device out of the shutdown mode.
The
ADM3307E
contains five drivers and three receivers and is
intended for mobile phone data lump cables and portable
computing applications.
The
ADM3311E
contains three drivers and five receivers and is
intended for serial port applications on notebook/laptop
computers.
The
ADM3310E
is a low current version of the
ADM3311E.
This device also allows two receivers to be active in shutdown
mode.
The
ADM3312E
contains three drivers and three receivers and
is intended for serial port applications, PDAs, mobile phone
data lump cables, and other hand-held devices.
Rev. J | Page 3 of 20
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
SPECIFICATIONS
V
CC
= 2.7 V to 3.6 V, C1 to C5 = 0.1 µF. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1
Parameter
Operating Voltage Range
V
CC
Power Supply Current
ADM3307E
ADM3311E, ADM3312E
ADM3310E, ADM3315E
ADM3310E, ADM3311E, ADM3312E,
ADM3315E
Shutdown Supply Current
Input Pull-Up Current
Input Leakage Current, SD, EN
Input Logic Threshold Low, V
INL
Input Logic Threshold High, V
INH
CMOS Output Voltage Low, V
OL
CMOS Output Voltage High, V
OH
CMOS Output Leakage Current
ADM3307E
ADM3310E, ADM3311E
ADM3312E, ADM3315E
Charge Pump Output Voltage, V+
ADM3307E, ADM3311E, ADM3312E
Charge Pump Output Voltage, V−
ADM3307E, ADM3311E, ADM3312E
Charge Pump Output Voltage, V+
ADM3310E, ADM3315E
Charge Pump Output Voltage, V−
ADM3310E, ADM3315E
EIA-232 Input Voltage Range
EIA-232 Input Threshold Low
EIA-232 Input Threshold High
EIA-232 Input Hysteresis
EIA-232 Input Resistance
ADM3307E, ADM3310E, ADM3311E,
ADM3312E
ADM3315E
Output Voltage Swing
ADM3310E, ADM3315E
ADM3307E, ADM3311E, ADM3312E
2.0
0.4
V
CC
− 0.6
0.04
0.05
+7.25
−7.25
+6.5
−6.5
−25
0.4
+25
1.3
2.0
0.14
5
22
±5.0
±6.4
±5.5
2.4
±1
±5
Min
2.7
Typ
3.3
0.75
0.75
0.45
0.45
0.35
Max
3.6
1.5
4.5
1
4.5
0.85
35
1
25
±1
0.8
0.4
Unit
V
mA
mA
mA
mA
mA
mA
µA
µA
µA
V
V
V
V
V
µA
µA
V
V
V
V
V
V
V
V
kΩ
kΩ
V
V
V
Ω
mA
Test Conditions/Comments
Data Sheet
V
CC
= 3.0 V to 3.6 V; no load
V
CC
= 2.7 V to 3.6 V; no load
No load; V
CC
= 3.0 V to 3.6 V; T
A
= 0°C to 85°C
No load; V
CC
= 2.7 V to 3.6 V; T
A
= − 40°C to +85°C
V
CC
= 2.7 V to 3.6 V; no load
R
L
= 3 kΩ to GND on all T
OUTS
0.02
10
0.02
T
IN
= GND
T
IN
, EN, SHDN
T
IN
, EN, SHDN; V
CC
= 2.7 V
T
IN
, EN, SHDN
I
OUT
= 1.6 mA
I
OUT
= −200 µA
EN = V
CC
, 0 V < R
OUT
< V
CC
EN = V
CC
, 0 V < R
OUT
< V
CC
No load
No load
No load
No load
3
14
7
31
±5.5
±5.0
Transmitter Output Resistance
RS-232 Output Short-Circuit Current
300
±15
±60
All transmitter outputs loaded with 3 kΩ to ground
V
CC
= 3.0 V
V
CC
= 2.7 V
All transmitter outputs loaded with 3 kΩ to ground
V
CC
= 0 V, V
OUT
= ±2 V
Rev. J | Page 4 of 20
Data Sheet
Parameter
Maximum Data Rate
ADM3307E
ADM3310E, ADM3311E, ADM3312E,
ADM3315E
Receiver Propagation Delay, T
PHL
, T
PLH
Receiver Output Enable Time, t
ER
Receiver Output Disable Time, t
DR
Transmitter Propagation Delay, T
PHL
, T
PLH
Transition Region Slew Rate
ESD PROTECTION (I/O PINS)
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
Min
250
460
250
Typ
720
920
460
0.3
0.17
100
300
500
18
±15
±15
±8
Max
Unit
kbps
kbps
kbps
µs
µs
ns
ns
ns
V/µs
kV
kV
kV
Test Conditions/Comments
R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF to 1000 pF, V
CC
= 2.7 V
R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF to 1000 pF, V
CC
= 3.0 V
R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF to 1000 pF, V
CC
= 3.0 V
C
L
= 150 pF
C
L
= 150 pF;
ADM3307E
only
1
3
R
L
= 3 kΩ, C
L
= 1000 pF
R
L
= 3 kΩ, C
L
= 50 pF to 1000 pF
1
Human body model
IEC 1000-4-2 air discharge
IEC 1000-4-2 contact discharge
2
1
2
Measured at +3 V to −3 V or −3 V to +3 V.
Includes CMOS I/O, SD, and EN for ADM3307E.
Rev. J | Page 5 of 20
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