intersil ISL4260E DATA SHEET
®
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ISL4260E
Data Sheet August 2004
QFN Packaged, ±15kV ESD Protected, +3V
to +5.5V, 150nA, 250kbps, RS-232
Transmitters/Receivers with Separate
Logic Supply
The ISL4260E 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 cell phones where the
low operational, and even lower standb y, power consumption
is critical. Efficient on-chip charge pumps, coupled with a
manual powerdown function reduces the standby supply
current to a 150nA trickle. Tiny 5mm x 5mm Quad Flat No-
Lead (QFN) 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.
The ISL4260E features a V
pin that adjusts the logic pin
L
(see Pin Descriptions table) output levels and input
thresholds to values compatible with the V
external logic (e.g., a UART).
The single pin powerdown function (SHDN
the receiver and transmitter outputs, while shutting down the
charge pump to minimize supply current drain.
Table 1 summarizes the features of the ISL4260E, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
= 3.0V. Targeted
CC
powering the
CC
= 0) disables all
FN6035.1
Features
• Available in Near Chip Scale QFN (5mmx5mm) Package
•V
Pin for Compatibility with Mixed Voltage Systems
L
• ESD Protection for RS-232 I/O Pins to
• Single SHDN
Pin Disables Transmitters and Receivers
±15kV (IEC61000)
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• On-Chip Charge Pumps Require Only Four External
0.1µF Capacitors
• Receiver Hysteresis For Improved Noise Immunity
• Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 300µA
• Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
• Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
• Low Supply Current in Powerdown State. . . . . . . . .150nA
• Pb-free available
Applications
• Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Digital Cameras
- PDAs and PDA Cradles
- Cellular/Mobile Phones
Ordering Information
PART
NUMBER
ISL4260EIR -40 to 85 32 Lead QFN L32.5x5
ISL4260EIRZ
(See Note)
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
PART
NUMBER
ISL4260E 3 2 250 NO YES YES NO
TEMP.
o
RANGE (
-40 to 85 32 Lead QFN
NO. OF
C) PACKAGE PKG. NO.
(Pb-free)
NO. OF
Tx.
DATA RATE
Rx.
1
(kbps)
L32.5x5
TABLE 1. SUMMARY OF FEATURES
Rx. ENABLE
FUNCTION?
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
LOGIC
V
L
SUPPLY PIN?
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
MANUAL
POWER- DOWN?
Copyright © Intersil Americas Inc. 2003, 2004. All Rights Reserved
POWERDOWN FUNCTION?
AUTOMATIC
Pinout
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ISL4260E
ISL4260E (QFN)
TOP VIEW
NC
C1-
V+
C1+
NC
1
C2+
2
C2-
3
V-
4
T1
5
IN
T2
6
IN
NC
7
NC
8
11 12 13 14 159 10
IN
NC
T3
NC
OUTR1OUT
R2
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
T
OUT
R
R
OUT
V
SHDN
NC No Connection
System power supply input (3.0V to 5.5V).
TTL/CMOS compatible transmit ter I nput s . The switching point is a function of the VL voltage.
IN
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
±15kV ESD Protected, RS-232 compatible receiver in puts.
IN
TTL/CMOS level receiver outputs. Swings between GND and VL.
Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply.
L
Active low TTL/C MOS input to tri-state receiver and tr ansmitter outputs and to shut down the on-board power supply to place de vice
in low power mode. The switching point is a function of the V
SHDN
voltage.
L
CC
V
2728293031 252632
NC
GND
L
V
NC
NC
24
T1
OUT
23
T2
OUT
22
T3
OUT
21
NC
20
R1
IN
19
R2
IN
18
NC
17
16
NC
2
Typical Operating Circuit
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ISL4260E
+3.3V to +5V
TTL/CMOS
LOGIC LEVELS
LOGIC V
C
0.1µF
C
0.1µF
T1
T2
T3
R1
OUT
R2
OUT
CC
0.1µF
+
0.1µF
29
1
2
IN
IN
IN
C1+
+
31
C1-
2
C2+
+
3
C2-
5
6
10
13
12
V
15
L
+
V
CC
R
R
GND
27
30
C
3
V+
V-
T
1
T
2
T
3
1
5kΩ
2
5kΩ
SHDN
26
+
0.1µF
4
C
4
0.1µF
+
23
T1
OUT
22
T2
OUT
OUT
IN
IN
RS-232
LEVELS
21
T3
19
R1
18
R2
28
V
CC
3
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