intersil ISL83385E DATA SHEET
®
www.BDTIC.com/Intersil
ISL83385E
Data Sheet January 16, 2005
±15kV ESD Protected, +3V to +5.5V,
1 Microamp, 250kbps,
RS-232 Transmitters/Receivers
The Intersil ISL83385E contains 3.0V to 5.5V powered
RS-232 transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 specifications, even at V
applications are PDAs, Palmtops, and notebook and laptop
computers where the low operational, and even lower
standby, power consumption is critical. Efficient on-chip
charge pumps, coupled with a manual powerdown function
reduces the standby supply current to a 1µA trickle. Small
footprint packaging, and the use of small, low value
capacitors ensure board space savings as well. Data rates
greater than 250kbps are guaranteed at worst case load
conditions. This device is fully compatible with 3.3V only
systems, mixed 3.3V and 5.0V systems, and 5.0V only
systems.
The single pin powerdown function (SHDN
the transmitters, while shutting down the charge pump to
minimize supply current drain.
Table 1 summarizes the features of the ISL83385E, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
= 3.0V. Targeted
CC
= 0) disables all
Ordering Information
PAR T
NUMBER
ISL83385ECA 83385ECA 0 to 70 20 Ld SSOP M20.209
ISL83385ECAZ
(See Note)
ISL83385EIA 83385EIA -40 to 85 20 Ld SSOP M20.209
ISL83385EIAZ
(See Note)
ISL83385EIB 83385EIB -40 to 85 18 Ld SOIC M18.3
ISL83385EIBZ
(See Note)
Add “-T” suffix for tape and reel.
PAR T
MARKING
83385ECAZ 0 to 70 20 Ld SSOP
83385EIAZ -40 to 85 20 Ld SSOP
83385EIBZ -40 to 85 18 Ld SOIC
TEMP.
RANGE
(°C) PACKAGE
(Pb-free)
(Pb-free)
(Pb-free)
PKG.
DWG. #
M20.209
M20.209
M18.3
FN6001.4
Features
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Low Power, Pin Compatible Upgrade for MAX3385E
• Single SHDN Pin Disables Transmitters
• RS-232 Compatible Outputs at 2.7V
• Receivers Active in Powerdown
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External
0.1µF Capacitors
• Receiver Hysteresis For Improved Noise Immunity
• Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 0.3mA
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/µs
• Wide Power Supply Range . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . . .<1µA
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Digital Cameras
- Cellular/Mobile Phones
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, 2004-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL83385E
www.BDTIC.com/Intersil
TABLE 1. SUMMARY OF FEATURES
PART NUMBER
NO. OF
Tx.
NO. OF
Rx.
NO. OF
MONITOR Rx.
)
(R
OUTB
DATA
RATE
(kbps)
Rx. ENABLE
FUNCTION?
READY
OUTPUT?
MANUAL
POWER-
DOWN?
POWERDOWN
ISL83385E 2 2 0 250 No No Yes No
Pinouts
ISL83385E (SOIC)
TOP VIEW
ISL83385E (SSOP)
TOP VIEW
AUTOMATIC
FUNCTION?
18
SHDN
V
17
CC
GND
16
15
T1
OUT
R1
14
IN
R1
13
OUT
T1
12
IN
T2
11
IN
10
R2
OUT
T2
C1+
C2+
OUT
R2
NC
V+
C1-
C2-
1
2
3
4
5
6
V-
7
8
9
IN
Pin Descriptions
PIN FUNCTION
V
CC
V+ Internally generated positive transmitter supply (+5.5V).
V- Internally generated negative transmitter supply (-5.5V).
GND Ground connection.
C1+ External capacitor (voltage doubler) is connected to this lead.
C1- External capacitor (voltage doubler) is connected to this lead.
C2+ External capacitor (voltage inverter) is connected to this lead.
C2- External capacitor (voltage inverter) is connected to this lead.
T
IN
T
OUT
R
IN
R
OUT
SHDN
System power supply input (3.0V to 5.5V).
TTL/CMOS compatible transmitter Inputs.
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
±15kV ESD Protected, RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
Active low input to shut down transmitters and on-board power supply, to place device in low power mode.
T2
C1+
C2+
OUT
R2
NC
V+
C1-
C2-
NC
20
1
2
3
4
5
6
V-
7
8
9
IN
10
SHDN
V
19
CC
GND
18
17
T1
OUT
R1
16
IN
R1
15
OUT
T1
14
IN
T2
13
IN
12
R2
OUT
NC
11
2
FN6001.4
January 16, 2005
Typical Operating Circuit
www.BDTIC.com/Intersil
TTL/CMOS
LOGIC LEVELS
+3.3V to +5V
0.1µF
0.1µF
R1
R2
C
C
T1
T2
OUT
OUT
ISL83385E
ISL83385E (Note 2)
C3 (OPTIONAL CONNECTION, NOTE 1)
+
0.1µF
2
1
2
IN
IN
C1+
+
4
C1-
5
C2+
+
6
C2-
12
11
13
10
V
CC
R
R
2
GND
17
V+
V-
T
1
T
2
5kΩ
1
5kΩ
SHDN
16
+
3
C
3
+
0.1µF
7
C
4
0.1µF
+
15
T1
OUT
8
T2
OUT
14
R1
9
R2
18
V
CC
RS-232
LEVELS
IN
IN
NOTES:
1. The negative terminal of C
can be connected to either VCC or Gnd.
3
2. Pin numbers refer to SOIC package.
3
FN6001.4
January 16, 2005
ISL83385E
www.BDTIC.com/Intersil
Absolute Maximum Ratings Thermal Information
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
, SHDN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
T
IN
R
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V
IN
Output Voltages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V
T
OUT
R
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC +0.3V
OUT
Short Circuit Duration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
T
OUT
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3. θ
is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
JA
Thermal Resistance (Typical, Note 3)
18 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . 75
20 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 125
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(Lead Tips Only)
θ
JA
(°C/W)
Operating Conditions
Temperature Range
ISL83385ECX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ISL83385EIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C
Electrical Specifications Test Conditions: V
Typicals are at T
PARAMETER TEST CONDITIONS
DC CHARACTERISTICS
Supply Current, Enabled All Outputs Unloaded, SHDN
Supply Current, Powerdown SHDN = GND 25 - 1 10 µA
LOGIC AND TRANSMITTER INPUTS
Input Logic Threshold Low T
Input Logic Threshold High TIN, SHDN VCC = 3.3V Full 2.0 - - V
Transmitter Input Hysteresis 25 - 0.5 - V
Input Leakage Current T
RECEIVER OUTPUTS
Output Voltage Low I
Output Voltage High I
RECEIVER INPUTS
Input Voltage Range Full -25 - 25 V
Input Threshold Low V
Input Threshold High V
Input Hysteresis 25 - 0.5 - V
Input Resistance 25 3 5 7 kΩ
TRANSMITTER OUTPUTS
Output Voltage Swing All Transmitter Outputs Loaded with 3kΩ to Ground Full ±5.0 ±5.4 - V
Output Resistance V
Output Short-Circuit Current Full - ±35 ±60 mA
Output Leakage Current V
, SHDN Full - - 0.8 V
IN
, SHDN Full - ±0.01 ±1.0 µA
IN
= 1.6mA Full - - 0.4 V
OUT
= -1.0mA Full V
OUT
= 3.3V 25 0.6 1.2 - V
CC
= 5.0V 25 0.8 1.5 - V
V
CC
= 3.3V 25 - 1.5 2.4 V
CC
= 5.0V 25 - 1.8 2.4 V
V
CC
=V+=V-=0V, Transmitter Output=±2V Full 300 10M - Ω
CC
= ±12V, VCC= 0V or 3V to 5.5V, SHDN =GND Full - - ±25 µA
OUT
= 3V to 5.5V, C1 - C4 = 0.1µF; Unless Otherwise Specified.
CC
= 25°C
A
TEMP
(°C) MIN TYP MAX UNITS
=VCC, VCC = 3.15V 25 - 0.3 1 mA
= 5.0V Full 2.4 - - V
V
CC
CC
-0.6 V
-0.1 - V
CC
4
FN6001.4
January 16, 2005
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