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Details, datasheet, quote on part number:ISL4260EIR
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| Part: | ISL4260EIR |
| Category: | Analog & Mixed-Signal Processing |
| Description: | QFN Packaged, 15kV Esd Protected, +3V to +5.5V, 150nA, 250kbps, RS-232 Transmitters/receivers With Separate Logic Supply |
| Company: | Intersil Corporation |
| Datasheet: | Download ISL4260EIR datasheet File size : 269 kB |
| Request For quote: | Find where to buy ISL4260EIR
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Datasheet text preview:
®
ISL4260E
D a ta Sheet Ja nu a r y 2003 FN6035
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 VCC = 3.0V. Targeted applications are PDAs, Palmtops, and cell phones 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 150nA trickle. Tiny 5mm x 5mm Quad Flat NoLead (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 VL pin that adjusts the logic pin (see Pin Descriptions table) output levels and input thresholds to values compatible with the VCC powering the external logic (e.g., a UART). The single pin powerdown function (SHDN = 0) disables all 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.
Features
· Available in Near Chip Scale QFN (5mmx5mm) Package · VL Pin for Compatibility with Mixed Voltage Systems · ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000) · Single SHDN Pin Disables Transmitters and Receivers · 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 · Ver y 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
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
PA RT NUMBER ISL4260EIR ISL4260EIR-T TEMP. RANGE (oC) -40 to 85 -40 to 85 PACKAGE 32 Lead QFN 32 Lead QFN Tape & Reel PKG. NO. L32.5x5 L32.5x5
TABLE 1. SUMMARY OF FEATURES PART NUMBER ISL4260E NO. OF NO. OF DATA RATE Rx. ENABLE Tx. Rx. (kbps) FUNCTION? 3 2 2 50 NO VL LOGIC SUPPLY PIN? YES MANUAL AUTOMAT IC POWER- DOWN? POWERDOWN FUNCTION? YES NO
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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. All Rights Reserved
ISL4260E Pinout
ISL4260E (QFN) TOP VIEW
SHDN C1+ C1GND 26 V CC NC V+ NC 25 24 23 22 21 20 19 18 17 9 NC 10 T3IN 11 NC 12 R2OUT 13 R1OUT 14 NC 15 VL 16 NC NC T1OUT T2OUT T3OUT NC R1IN R2IN NC
32 NC C2+ C2VT1IN T2IN NC NC 1 2 3 4 5 6 7 8
31
30
29
28
27
Pin Descriptions
PIN VCC V+ VGN D C1+ C 1C2+ C 2TIN TOUT RIN ROUT VL SHDN NC System power supply input (3.0V to 5.5V). Internally generated positive transmitter supply (+5.5V). Internally generated negative transmitter supply (-5.5V). Ground connection. External capacitor (voltage doubler) is connected to this lead. External capacitor (voltage doubler) is connected to this lead. External capacitor (voltage inverter) is connected to this lead. External capacitor (voltage inverter) is connected to this lead. TTL/CMOS compatible transmitter Inputs. The switching point is a function of the VL voltage. ±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs. ±15kV ESD Protected, RS-232 compatible receiver inputs. TTL/CMOS level receiver outputs. Swings between GND and VL. Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply. Active low TTL/CMOS input to tri-state receiver and transmitter outputs and to shut down the on-board power supply to place device in low power mode. The switching point is a function of the VL voltage. No Connection FUNCTION
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ISL4260E Typical Operating Circuit
+3.3V to +5V
+ 0.1µF 29 + 31 2 + 3 5 C1+ C1C2+ C2-
27 VCC 30 V+ 4 + 23 + C3 0.1µF C4 0.1µF
C1 0.1µF C2 0.1µF
VT1
T1IN
T1OUT
T2IN T TL/CMO S LOGIC LEVELS
6
T2
22 T2OUT
T3IN
10
T3
21 T3OUT
RS-232 LEVELS
R1 R1OUT 13 5k 12 R2OUT R2 5k VL SHDN GND 26
19
R1IN
18 R2IN
LO GI C V C C 0.1µF
15 +
28
VCC
3
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