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Intersil Electronic Components Datasheet

ICL3226 Datasheet

1 Microamp/ +3V to +5.5V/ 250kbps/ RS-232 Transceivers with Enhanced Automatic Powerdown

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ICL3226 pdf
®
Data Sheet
ICL3224, ICL3226, ICL3238, ICL3244
November 2002
FN4876.6
1 Microamp, +3V to +5.5V, 250kbps,
RS-232 Transceivers 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 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 manual and enhanced
automatic powerdown functions, reduce 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 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. The ICL3244/38 also include a noninverting
always-active receiver for RING INDICATOR monitoring.
These devices feature 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
30sec. These devices power back up, automatically,
whenever they sense a transition on any transmitter or
receiver input.
Table 1 summarizes the features of the devices represented
by this data sheet, while Application Note AN9863
summarizes the features of each device comprising the
ICL32XX 3V family.
Features
±15kV ESD Protected (Human Body Model)
• Manual and Enhanced Automatic Powerdown Features
• Drop in Replacements for MAX3224, MAX3226,
MAX3238, MAX3244
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• RS-232 Compatible with VCC = 2.7V
• On-Chip Voltage Converters Require Only Four External
0.1µF Capacitors
• Flow-Through Pinout (ICL3238)
• Guaranteed Mouse Driveability (ICL3244)
• “Ready to Transmit” Indicator Output (ICL3224/26)
• Receiver Hysteresis For Improved Noise Immunity
• 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
- Data Cradles
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• AN9863, “3V to +5.5V, 250k-1Mbps, RS-232
Transmitters/Receivers”
PART
NUMBER
ICL3224
ICL3226
ICL3238
ICL3244
NO. OF NO. OF
Tx. Rx.
22
11
53
35
TABLE 1. SUMMARY OF FEATURES
NO. OF
MONITOR Rx.
(ROUTB)
0
DATA
RATE
(kbps)
250
Rx. ENABLE
FUNCTION?
NO
READY
OUTPUT?
YES
0
250 NO
YES
1
250 NO
NO
1
250 NO
NO
MANUAL
POWER-
DOWN?
YES
YES
YES
YES
ENHANCED
AUTOMATIC
POWERDOWN
YES
YES
YES
YES
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 registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.



Intersil Electronic Components Datasheet

ICL3226 Datasheet

1 Microamp/ +3V to +5.5V/ 250kbps/ RS-232 Transceivers with Enhanced Automatic Powerdown

No Preview Available !

ICL3226 pdf
ICL3224, ICL3226, ICL3238, ICL3244
Ordering Information
(NOTE 1)
PART NO.
ICL3224CA
ICL3224IA
ICL3224CP
ICL3226CA
ICL3226IA
ICL3238CA
ICL3238IA
ICL3244CA
TEMP.
RANGE (oC)
PACKAGE
0 to 70 20 Ld SSOP
-40 to 85 20 Ld SSOP
0 to 70 20 Ld PDIP
0 to 70 16 Ld SSOP
-40 to 85 16 Ld SSOP
0 to 70 28 Ld SSOP
-40 to 85 28 Ld SSOP
0 to 70 28 Ld SSOP
PKG. NO.
M20.209
M20.209
E20.3
M16.209
M16.209
M28.209
M28.209
M28.209
Ordering Information (Continued)
(NOTE 1)
PART NO.
TEMP.
RANGE (oC)
PACKAGE
PKG. NO.
ICL3244IA
-40 to 85 28 Ld SSOP
M28.209
ICL3244CB
0 to 70 28 Ld SOIC
M28.3
ICL3244IB
-40 to 85 28 Ld SOIC
M28.3
ICL3244CV
0 to 70 28 Ld TSSOP
M28.173
ICL3244IV
-40 to 85 28 Ld TSSOP
M28.173
NOTE:
1. Most surface mount devices are available on tape and reel; add
“-T” to suffix.
Pinouts
ICL3224 (PDIP, SSOP)
TOP VIEW
READY 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
T2OUT 8
R2IN 9
R2OUT 10
20 FORCEOFF
19 VCC
18 GND
17 T1OUT
16 R1IN
15 R1OUT
14 FORCEON
13 T1IN
12 T2IN
11 INVALID
ICL3238 (SSOP)
TOP VIEW
C2+ 1
GND 2
C2- 3
V- 4
T1OUT 5
T2OUT 6
T3OUT 7
R1IN 8
R2IN 9
T4OUT 10
R3IN 11
T5OUT 12
FORCEON 13
FORCEOFF 14
28 C1+
27 V+
26 VCC
25 C1-
24 T1IN
23 T2IN
22 T3IN
21 R1OUT
20 R2OUT
19 T4IN
18 R3OUT
17 T5IN
16 R1OUTB
15 INVALID
ICL3226 (SSOP)
TOP VIEW
READY 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
R1IN 8
16 FORCEOFF
15 VCC
14 GND
13 T1OUT
12 FORCEON
11 T1IN
10 INVALID
9 R1OUT
ICL3244 (SOIC, SSOP, TSSOP)
TOP VIEW
C2+ 1
C2- 2
V- 3
R1IN 4
R2IN 5
R3IN 6
R4IN 7
R5IN 8
T1OUT 9
T2OUT 10
T3OUT 11
T3IN 12
T2IN 13
T1IN 14
28 C1+
27 V+
26 VCC
25 GND
24 C1-
23 FORCEON
22 FORCEOFF
21 INVALID
20 R2OUTB
19 R1OUT
18 R2OUT
17 R3OUT
16 R4OUT
15 R5OUT
2



Intersil Electronic Components Datasheet

ICL3226 Datasheet

1 Microamp/ +3V to +5.5V/ 250kbps/ RS-232 Transceivers with Enhanced Automatic Powerdown

No Preview Available !

ICL3226 pdf
ICL3224, ICL3226, ICL3238, ICL3244
Pin Descriptions
PIN FUNCTION
VCC
V+
System power supply input (3.0V to 5.5V).
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.
TIN
TOUT
RIN
ROUT
ROUTB
INVALID
TTL/CMOS compatible transmitter Inputs.
RS-232 level (nominally ±5.5V) transmitter outputs.
RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver outputs.
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
READY Active high output that indicates when the ICL32XX is ready to transmit (i.e., V- -4V)
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
FORCEON Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
Typical Operating Circuits
ICL3224
+3.3V
+ 0.1µF
C1
0.1µF
C2
0.1µF
2
+
C1+
4
C1-
5
+ C2+
6
C2-
TTL/CMOS
LOGIC
LEVELS
13
T1IN
12
T2IN
15
R1OUT
19
VCC
T1
T2
R1
3
V+
+ C3
0.1µF
V- 7
17
C4
+0.1µF
T1OUT
8
T2OUT
16
5kR1IN
RS-232
LEVELS
10
R2OUT
9
R2 5kR2IN
1
READY
20
FORCEOFF
14
FORCEON
11
INVALID
GND
18
VCC
TO POWER
CONTROL
LOGIC
ICL3226
+3.3V
+
0.1µF
C1
0.1µF
C2
0.1µF
2
+
C1+
4 C1-
5
+
C2+
6
C2-
TTL/CMOS
LOGIC
LEVELS
11
T1IN
9
R1OUT
1
READY
15
VCC
T1
R1
3
V+
+ C3
0.1µF
V- 7
13
C4
+0.1µF
T1OUT RS-232
8 LEVELS
5kR1IN
16
FORCEOFF
VCC
12 10
FORCEON
INVALID
GND
14
TO POWER
CONTROL
LOGIC
3




Part Number ICL3226
Description 1 Microamp/ +3V to +5.5V/ 250kbps/ RS-232 Transceivers with Enhanced Automatic Powerdown
Maker Intersil
Total Page 20 Pages
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ICL3226 pdf
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