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參數資料
| 型號： | ISL4270EIR-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | TRIPLE LINE TRANSCEIVER, PQCC32 |
| 封裝： | 5 X 5 MM, PLASTIC, MO-220VHHD-2, QFN-32 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 335K |
| 代理商： | ISL4270EIR-T |
1
FN6041.1
ISL4270E
QFN Packaged, +/-15kV ESD Protected,
+3V to +5.5V, 300nA, 250kbps, RS-232
Transceivers with Enhanced Automatic
Powerdown and a Separate Logic Supply
The Intersil ISL4270E is a 3.0V to 5.5V powered RS-232
transceiver which meets ElA/TIA-232 and V.28/V.24
specifications, even at VCC = 3.0V. Additionally, it provides
±15kV ESD protection (IEC61000-4-2 Air Gap and Human
Body Model) on transmitter outputs and receiver inputs
(RS-232 pins). 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 300nA 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 ISL4270E features a VL pin that adjusts the logic pin
output levels and input thresholds to values compatible with
the VCC powering the external logic (e.g., a UART).
This device includes 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 30 seconds.
It power back up, automatically, whenever it senses a
transition on any transmitter or receiver input.
Table 1 summarizes the features of the ISL4270E, while
Application Note AN9863 summarizes the features of each
device comprising the 3V RS-232 family.
Features
Available in Near Chip Scale QFN (5mmx5mm) Package
VL Supply Pin for Compatibility with Mixed Voltage
Systems
ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
Manual and Enhanced Automatic Powerdown Features
Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
On-Chip Charge Pumps Require Only Four External
0.1
F Capacitors
Receivers Stay Active in Powerdown
Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 300
A
Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
Low Supply Current in Powerdown State . . . . . . . . 300nA
Pb-Free Available (RoHS Compliant)
Applications
Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Digital Cameras
- PDA’s and PDA Cradles
- Cellular/Mobile Phones
Ordering Information
PART NO.
TEMP.
RANGE (oC)
PACKAGE
PKG. DWG.
#
ISL4270EIR
-40 to 85
32 Ld QFN
L32.5x5
ISL4270EIRZ
(See Note)
-40 to 85
32 Ld QFN
(Pb-free)
L32.5x5
*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 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-
020C.
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO. OF
Tx.
NO. OF
Rx.
DATA RATE
(kbps)
Rx. ENABLE
FUNCTION?
VL LOGIC
SUPPLY PIN?
MANUAL
POWER- DOWN?
ENHANCED AUTOMATIC
POWERDOWN FUNCTION?
ISL4270E
3
250
NO
YES
Data Sheet
August 2004
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. 2003, 2004. All Rights Reserved
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