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Details, datasheet, quote on part number:ICL3238E
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| Part: | ICL3238E |
| Category: | Analog & Mixed-Signal Processing |
| Description: | +/-15kV Esd Protected, +3V to +5.5V, 1microamp, 250kbps, RS-232 Transceivers With Enhanced Automatic Powerdown |
| Company: | Intersil Corporation |
| Datasheet: | Download ICL3238E datasheet File size : 365 kB |
| Request For quote: | Find where to buy ICL3238E
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Datasheet text preview:
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ICL3238E
D a ta Sheet Ju n e 2003 FN6012.1
±15kV ESD Protected, +3V to +5.5V, 10nA, 250kbps, RS-232 Transceiver with Enhanced Automatic Powerdown
The Intersil ICL3238E 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. 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 cell phones, Palmtops, and data cables 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 10nA 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 providing compatibility with popular PC communication software. The ICL3238E is a 5 driver, 3 receiver device optimized for DCE applications with full hardware handshaking. It also includes a noninverting always-active receiver for RING INDICATOR monitoring. 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 ICL3238E powers back up, automatically, whenever it senses a transition on any transmitter or receiver input. The transmitter and logic inputs include active feedback resistors that retain the input state once driven to a valid logic level. Table 1 summarizes the features of the ICL3238E, while Application Note AN9863 summarizes the features of each device comprising the ICL32XXE 3V family.
Features
· ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000) · Active Feedback Resistors on TX and Logic Inputs. · Manual and Enhanced Automatic Powerdown Features · Pin Compatible Replacement for MAX3238E, MAX3238 · Drop In Replacement For SP3238E · Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V · Flow Through Pinout · Latch-Up Free · On-Chip Voltage Converters Require Only Four External Capacitors · Receiver and Transmitter 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. . . . . . . . . 10nA · RS-232 Compatible Outputs at 2.7V Supply
Applications
· Any System Requiring RS-232 Communication Ports - Battery Powered, Hand-Held, and Portable Equipment - Data Cradles - Modems, Printers and other Peripherals - Cellular/Mobile Phones, Data Cables
Pinout
ICL3238E (SSOP, TSSOP) TOP VIEW
C2+ GND C21 2 3 4 5 6 7 8 9 28 C1+ 27 V+ 26 VCC 25 C124 T1IN 23 T2IN 22 T3IN 21 R1OUT 20 R2OUT 19 T4IN 18 R3OUT 17 T5IN 16 R1OUTB 15 INVALID
Ordering Information
PART NO. ICL3 238ECA ICL3 238EIA ICL3 238ECV ICL3 238EIV TEMP. RANGE (oC) 0 to 70 -40 to 85 0 to 70 -40 to 85 PACKA GE 28 Ld SSOP 28 Ld SSOP 28 Ld TSSOP 28 Ld TSSOP PKG. DWG. # M 28. 209 M 28. 209 M 28. 173 M 28. 173
VT1 O U T T2 O U T T3 O U T R1IN R2IN
NOTE: Most surface mount devices are available on tape and reel; add "-T" to suffix.
T4OUT 10 R3IN 11 T5OUT 12 FORCEON 13 FORCEOFF 14
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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. All other trademarks mentioned are the property of their respective owners.
ICL3238E
TABLE 1. SUMMARY OF FEATURES NO. OF MONITOR Rx. (ROUTB) 1 DATA RATE (kbps) 25 0 MANUAL POWERDOWN? YES ENHAN CED AUTOMATIC POWERDOWN FUNCTION? YES
PART NUMBER ICL3238E
NO. OF NO. OF Tx. Rx. 5 3
Rx. ENABLE FUNCTION? NO
READY OUTPUT? NO
Pin Descriptions
PIN VCC V+ VGND C 1+ C1C 2+ C2TIN TOUT RIN ROUT ROUTB INVALID FORCEOFF FORCEON NOTE: 1. These input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains that logic level until VCC is removed. Unused transmitter inputs may be left unconnected by the user. 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 (Note 1). ±15kV ESD Protected, RS-232 Level (Nominally ±5.5V) Transmitter Outputs. ±15kV ESD Protected, 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. Active Low to Shut Down Transmitters and On-Chip Power Supply. This overrides any automatic circuitry and FORCEON (see Table 2, Note 1). Active High Input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high, Note 1). FUNCTION
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ICL3238E Typical Operating Circuit
ICL 3238E
C3 (OPTIONAL CONNECTION, NOTE 2) 0.1µF C1 0.1µF C2 0.1µF 28 + 25 1 + 3 24 C1+ C1C2+ C2T1 T2 V+ 27 V+ 4 + C3 0.1µF NOT E 3 C4 0.1µF + T1OUT T2OUT T3OUT T4OUT T5OUT RS-232 LEVELS 5 6 7 10 12 8 R1 20 R2 R3OUT 18 R3 13 14 15 FORCEON FORCEOF F INVALID GND 2 5k 5k 11 R3IN R1IN 5k 9 R2IN + 26 VCC
+3.3V
NOT E 3
T1IN T2IN T3IN T4IN T5IN TTL /CMO S LOGIC LEVELS
23 22 19
T3 T4 T5
17
16 R1OUTB R1OUT 21
R2OUT
RS-232 LEVELS
VCC TO POWER CONTROL LOGIC
NOTES: 2. THE NEGATIVE TERMINAL OF C3 CAN BE CONNECTED TO EITHER VCC OR GND. 3. FOR VCC = 3.15V (3.3V -5%), USE C1 - C4 = 0.1µF OR GREATER. FOR VCC = 3.0V (3.3V -10%), USE C1 - C4 = 0.22µF.
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