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PDF ISL83385E Data sheet ( Hoja de datos )
| Número de pieza | ISL83385E | |
| Descripción | 15kV ESD Protected/ +3V to +5.5V/ +/-1 Microamp/ 250kbps/ RS-232 Transmitters/Receivers | |
| Fabricantes | Intersil Corporation | |
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TM
Data Sheet
ISL83385E
January 2001
File Number 6001
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 VCC = 3.0V. Targeted
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 = 0) disables all
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.
Ordering Information
PART
NUMBER
TEMP.
RANGE (oC)
PACKAGE
ISL83385ECB
0 to 70 18 Ld SOIC
ISL83385ECB-T 0 to 70 Tape and Reel
ISL83385ECA
0 to 70 20 Ld SSOP
ISL83385ECA-T 0 to 70 Tape and Reel
ISL83385EIB
-40 to 85 18 Ld SOIC
ISL83385EIB-T -40 to 85 Tape and Reel
ISL83385EIA
-40 to 85 20 Ld SSOP
ISL83385EIA-T -40 to 85 Tape and Reel
PKG. NO.
M18.3
M18.3
M20.209
M20.209
M18.3
M18.3
M20.209
M20.209
Features
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC1000)
• Low Power, Pin Compatible Upgrade for MAX3385E
• Single SHDN Pin Disables Transmitters
• 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
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
PART
NUMBER
ISL83385E
NO. OF NO. OF
Tx. Rx.
22
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
(ROUTB)
DATA
RATE
(kbps)
Rx. ENABLE
FUNCTION?
READY
OUTPUT?
0
250 NO
NO
MANUAL
POWER-
DOWN?
YES
AUTOMATIC
POWERDOWN
FUNCTION?
NO
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2001
1 page  
ISL83385E
Electrical Specifications
TTeypsticCaolsnadrietioantsT:AV=CC25=o3CV
to 5.5V, C1 - C4
(Continued)
=
0.1µF;
Unless
Otherwise
Specified.
PARAMETER
TEST CONDITIONS
TEMP
(oC)
MIN
TYP
Output Leakage Current
TIMING CHARACTERISTICS
VOUT = ±12V, VCC = 0V or 3V to 5.5V, SHDN = GND
Full -
-
Maximum Data Rate
Receiver Propagation Delay
Transmitter Output Enable Time
RL = 3kΩ, CL = 1000pF, One Transmitter Switching
Receiver Input to Receiver tPHL
Output, CL = 150pF
tPLH
From SHDN Rising Edge to TOUT = ±3.7V
Full 250
500
25 - 0.15
25 - 0.15
25 - 100
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
tPHL - tPLH (Note 4)
tPHL - tPLH
RL = 3kΩ to 7kΩ,
CL = 150pF to 1000pF
Measured From 3V to -3V or
-3V to 3V, VCC = 3.3V
CL = 150pF to 2500pF
25 - 100
25 -
50
25 6
-
25 4
-
ESD PERFORMANCE
RS-232 Pins (TOUT, RIN)
Human Body Model
IEC1000-4-2 Air Gap Discharge
25 - ±15
25 - ±15
IEC1000-4-2 Contact Discharge
25 -
±8
All Other Pins
Human Body Model
25 -
±3
NOTE:
4. Transmitter skew is measured at the transmitter zero crossing points.
MAX
±25
UNITS
µA
- kbps
- µs
- µs
- µs
- ns
- ns
30 V/µs
30 V/µs
- kV
- kV
- kV
- kV
Detailed Description
The ISL83385E operates from a single +3V to +5.5V supply,
guarantees a 250kbps minimum data rate, requires only four
small external 0.1µF capacitors, features low power
consumption, and meets all ElA RS-232C and V.28
specifications. The circuit is divided into three sections: The
charge pump, the transmitters, and the receivers.
Charge-Pump
Intersil’s new ISL83385E utilizes regulated on-chip dual
charge pumps as voltage doublers, and voltage inverters to
generate ±5.5V transmitter supplies from a VCC supply as
low as 3.0V. This allows these devices to maintain RS-232
compliant output levels over the ±10% tolerance range of
3.3V powered systems. The efficient on-chip power supplies
require only four small, external 0.1µF capacitors for the
voltage doubler and inverter functions over the full VCC
range; other capacitor combinations can be used as shown
in Table 3. The charge pumps operate discontinuously (i.e.,
they turn off as soon as the V+ and V- supplies are pumped
up to the nominal values), resulting in significant power
savings.
Transmitters
The transmitters are proprietary, low dropout, inverting
drivers that translate TTL/CMOS inputs to EIA/TIA-232
output levels. Coupled with the on-chip ±5.5V supplies,
these transmitters deliver true RS-232 levels over a wide
range of single supply system voltages.
All transmitter outputs disable and assume a high
impedance state when the device enters the powerdown
mode (see Table 2). These outputs may be driven to ±12V
when disabled.
All devices guarantee a 250kbps data rate for full load
conditions (3kΩ and 1000pF), VCC ≥ 3.0V, with one
transmitter operating at full speed. Under more typical
conditions of VCC ≥ 3.3V, RL = 3kΩ, and CL = 250pF, one
transmitter easily operates at 900kbps.
Transmitter inputs float if left unconnected (there are no pull-
up resistors), and may cause ICC increases. Connect
unused inputs to GND for the best performance.
TABLE 2. POWERDOWN TRUTH TABLE
SHDN TRANSMITTER RECEIVER
INPUT OUTPUTS OUTPUTS MODE OF OPERATION
H Active Active Normal Operation
L
High-Z
Active Manual Powerdown
Receivers
The ISL83385E contains standard inverting receivers that
convert RS-232 signals to CMOS output levels and accept
inputs up to ±30V while presenting the required 3kΩ to 7kΩ
input impedance (see Figure 1) even if the power is off
5
5 Page 
ISL83385E
Shrink Small Outline Plastic Packages (SSOP)
N
INDEX
AREA
E
-B-
H
0.25(0.010) M B M
GAUGE
PLANE
123
-A-
D
SEATING PLANE
A
0.25
0.010
L
-C-
e A1
B
0.25(0.010) M C A M B S
α
A2
0.10(0.004)
C
NOTES:
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2
of Publication Number 95.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.20mm (0.0078 inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Inter-
lead flash and protrusions shall not exceed 0.20mm (0.0078 inch)
per side.
5. The chamfer on the body is optional. If it is not present, a visual in-
dex feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “B” does not include dambar protrusion. Allowable dam-
bar protrusion shall be 0.13mm (0.005 inch) total in excess of “B”
dimension at maximum material condition.
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
M20.209 (JEDEC MO-150-AE ISSUE B)
20 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE
INCHES
MILLIMETERS
SYMBOL MIN MAX MIN MAX NOTES
A - 0.078 - 2.00 -
A1 0.002 - 0.05 -
-
A2
0.065 0.072 1.65
1.85
-
B
0.009 0.014 0.22
0.38
9
C
0.004 0.009 0.09
0.25
-
D
0.272 0.295 6.90
7.50
3
E
0.197 0.220 5.00
5.60
4
e 0.026 BSC 0.65 BSC -
H
0.292 0.322 7.40
8.20
-
L
0.022 0.037 0.55
0.95
6
N 20
20 7
α
0o 8o 0o 8o
-
Rev. 2 4/95
All Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at website www.intersil.com/quality/iso.asp.
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice.
Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. How-
ever, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
Sales Office Headquarters
NORTH AMERICA
Intersil Corporation
P. O. Box 883, Mail Stop 53-204
Melbourne, FL 32902
TEL: (321) 724-7000
FAX: (321) 724-7240
EUROPE
Intersil SA
Mercure Center
100, Rue de la Fusee
1130 Brussels, Belgium
TEL: (32) 2.724.2111
FAX: (32) 2.724.22.05
ASIA
Intersil Ltd.
8F-2, 96, Sec. 1, Chien-kuo North,
Taipei, Taiwan 104
Republic of China
TEL: 886-2-2515-8508
FAX: 886-2-2515-8369
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ISL83385E.PDF ] | |
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