ICL3244
TM
Data Sheet
June 2000
File Number
4876
1Microamp, +3V to +5.5V, 250kbps,
RS-232 Transceiver with Enhanced
Automatic Powerdown
The Intersil ICL32XX devices are 3.0V to 5.5V powered
RS-232 transmitters/receivers which meet ElA/TIA-232 and
V.28/V.24 speci鏗乧ations, even at V
CC
= 3.0V. Targeted
applications are PDAs, Palmtops, and notebook and laptop
computers where the low operational, and even lower
standby, power consumption is critical. Ef鏗乧ient on-chip
charge pumps, coupled with manual and enhanced
automatic powerdown functions, reduce the standby supply
current to a 1碌A(chǔ) 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 family is fully
compatible with 3.3V only systems, mixed 3.3V and 5.0V
systems, and 5.0V only systems.
The ICL3244 is a 3 driver, 5 receiver device that provides a
complete serial port suitable for laptop or notebook
computers. It also includes a noninverting always-active
receiver for 鈥渨ake-up鈥?capability.
This device, features an
enhanced automatic powerdown
function which powers down the on-chip power-supply and
driver circuits. This occurs when all receiver and transmitter
inputs detect no signal transitions for a period of 30s. The
ICL3244 powers back up, automatically, whenever it senses
a transition on any transmitter or receiver input.
Table 1 summarizes the features of the device represented
by this data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL3244 3V family.
Features
鈥?/div>
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Manual and Enhanced Automatic Powerdown Features
Drop in Replacement for MAX3244
Meets EIA/TIA-232 and V.28/V.24 Speci鏗乧ations at 3V
Latch-Up Free
On-Chip Voltage Converters Require Only Four External
0.1碌F Capacitors
Guaranteed Mouse Driveability
Receiver Hysteresis For Improved Noise Immunity
Guaranteed Minimum Data Rate . . . . . . . . . . . . 250kbps
Guaranteed Minimum Slew Rate . . . . . . . . . . . . . . . 6V/碌s
Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
Low Supply Current in Powerdown State . . . . . . . . . . 1碌A(chǔ)
Applications
鈥?Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Cellular/Mobile Phones
鈥?Related Literature
- Application Note AN9863, 鈥?V to +5.5V, 250k-1Mbps,
RS-232 Transmitters/Receivers鈥?/div>
Pinout
ICL3244 (SOIC, SSOP)
TOP VIEW
C2+ 1
C2- 2
V-
3
28 C1+
27 V+
26 V
CC
25 GND
24 C1-
23 FORCEON
22 FORCEOFF
21 INVALID
20 R2
OUTB
19 R1
OUT
18 R2
OUT
17 R3
OUT
16 R4
OUT
15 R5
OUT
R1
IN
4
Ordering Information
PART NO.
ICL3244CA
ICL3244CB
TEMP.
RANGE (
o
C)
0 to 70
0 to 70
PACKAGE
28 Ld SSOP
28 Ld SOIC
PKG. NO.
M28.209
M28.3
R2
IN
5
R3
IN
6
R4
IN
7
R5
IN
8
T1
OUT
9
T2
OUT
10
T3
OUT
11
T3
IN
12
T2
IN
13
T1
IN
14
NOTE: Most surface mount devices are available on tape and reel;
add 鈥?T鈥?to suf鏗亁.
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
(R
OUTB
)
1
DATA
RATE
(kbps)
250
MANUAL
POWER-
DOWN?
Yes
ENHANCED
AUTOMATIC
POWERDOWN
FUNCTION?
Yes
PART
NUMBER
ICL3244
NO. OF NO. OF
Tx.
Rx.
3
5
Rx. ENABLE
FUNCTION?
No
READY
OUTPUT?
No
4-1
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
漏
Intersil Corporation 2000
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