ICL3224E, ICL3226E, ICL3244E ® Data Sheet February 27, 2006 +/-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown The Intersil ICL32XXE 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. Additionally, they provide ±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 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 ICL3244E is a 3 driver, 5 receiver device that provides a complete serial port suitable for laptop or notebook computers. It also includes a noninverting always-active receiver for “wake-up” capability. These devices, feature an enhanced automatic powerdown function which powers down the on-chip powersupply and driver circuits. This occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30 seconds. 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 ICL32XXE 3V family. FN4899.6 Features • Pb-Free Plus Anneal Available (RoHS Compliant) • ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000) • Manual and Enhanced Automatic Powerdown Features • Drop in Replacements for MAX3224E, MAX3226E, MAX3244E • Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V • RS-232 Compatible with VCC = 2.7V • Latch-Up Free • On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors • Guaranteed Mouse Driveability (ICL3244E) • “Ready to Transmit” Indicator Output (ICL3224E/26E) • 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 Related Literature • Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)” TABLE 1. SUMMARY OF FEATURES PART NUMBER NO. OF NO. OF Tx. Rx. NO. OF MONITOR Rx. (ROUTB) DATA RATE (kbps) Rx. ENABLE FUNCTION? READY OUTPUT? MANUAL POWERDOWN? ENHANCED AUTOMATIC POWERDOWN FUNCTION? ICL3224E 2 2 0 250 No Yes Yes Yes ICL3226E 1 1 0 250 No Yes Yes Yes ICL3244E 3 5 1 250 No No Yes Yes 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2000, 2001, 2003-2006. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ICL3224E, ICL3226E, ICL3244E Ordering Information PART NO. PART MARKING TEMP. RANGE (°C) PACKAGE PKG. DWG. # ICL3224ECAZ (Note) 3224ECAZ 0 to 70 20 Ld SSOP (Pb-free) M20.209 ICL3224ECAZ-T (Note) 3224ECAZ 0 to 70 20 Ld SSOP Tape and Reel (Pb-free) M20.209 ICL3224EIA ICL3224EIA -40 to 85 20 Ld SSOP M20.209 ICL3224EIA-T ICL3224EIA -40 to 85 20 Ld SSOP Tape and Reel M20.209 ICL3224EIAZ (Note) 3224EIAZ -40 to 85 20 Ld SSOP (Pb-free) M20.209 ICL3224EIAZ-T (Note) 3224EIAZ -40 to 85 20 Ld SSOP Tape and Reel (Pb-free) M20.209 ICL3226ECA ICL3226ECA 0 to 70 16 Ld SSOP M16.209 ICL3226ECA-T ICL3226ECA 0 to 70 16 Ld SSOP Tape and Reel M16.209 ICL3226ECAZ (Note) 3226ECAZ 0 to 70 16 Ld SSOP (Pb-free) M16.209 ICL3226ECAZ-T 3226ECAZ 0 to 70 16 Ld SSOP Tape and Reel (Pb-free) M16.209 ICL3226EIA ICL3226EIA -40 to 85 16 Ld SSOP M16.209 ICL3226EIA-T ICL3226EIA -40 to 85 16 Ld SSOP Tape and Reel M16.209 ICL3226EIAZ 3226EIAZ -40 to 85 16 Ld SSOP (Pb-free) M16.209 ICL3226EIAZ-T 3226EIAZ -40 to 85 16 Ld SSOP Tape and Reel (Pb-free) M16.209 ICL3244ECA ICL3244ECA 0 to 70 28 Ld SSOP M28.209 ICL3244ECA-T ICL3244ECA 0 to 70 28 Ld SSOP Tape and Reel M28.209 ICL3244ECAZ (Note) ICL3244ECAZ 0 to 70 28 Ld SSOP (Pb-free) M28.209 ICL3244ECAZ-T (Note) ICL3244ECAZ 0 to 70 28 Ld SSOP Tape and Reel (Pb-free) M28.209 ICL3244EIA ICL3244EIA -40 to 85 28 Ld SSOP M28.209 ICL3244EIA-T ICL3244EIA -40 to 85 28 Ld SSOP Tape and Reel M28.209 ICL3244EIAZ (Note) ICL3244EIAZ -40 to 85 28 Ld SSOP (Pb-free) M28.209 ICL3244EIAZ-T (Note) ICL3244EIAZ -40 to 85 28 Ld SSOP Tape and Reel (Pb-free) M28.209 ICL3244EIB ICL3244EIB -40 to 85 28 Ld SOIC M28.3 NOTE: Intersil Pb-free plus anneal 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-020. Pinouts ICL3224E (SSOP) TOP VIEW READY 20 FORCEOFF 1 C1+ 2 19 VCC 3 ICL3226E (SSOP) TOP VIEW READY 1 16 FORCEOFF C1+ 2 15 VCC 3 14 GND 18 GND V+ C1- 4 17 T1OUT C1- 4 13 T1OUT C2+ 5 16 R1IN C2+ 5 12 FORCEON C2- 6 15 R1OUT C2- 6 11 T1IN V+ V- 14 FORCEON 7 T2OUT 8 13 T1IN R2IN 9 12 T2IN 11 INVALID R2OUT 10 2 V- 7 R1IN 8 10 INVALID 9 R1OUT ICL3224E, ICL3226E, ICL3244E Pinouts (Continued) ICL3244E (SOIC, SSOP) TOP VIEW C2+ 1 28 C1+ C2- 2 27 V+ 3 26 VCC R1IN 4 25 GND R2IN 5 24 C1- R3IN 6 23 FORCEON R4IN 7 22 FORCEOFF V- R5IN 8 21 INVALID T1OUT 9 20 R2OUTB T2OUT 10 19 R1OUT T3OUT 11 18 R2OUT T3IN 12 17 R3OUT T2IN 13 16 R4OUT T1IN 14 15 R5OUT Pin Descriptions PIN VCC FUNCTION System power supply input (3.0V to 5.5V). 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. TIN TTL/CMOS compatible transmitter Inputs. TOUT RIN ROUT ±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs. ±15kV ESD Protected, RS-232 compatible receiver inputs. TTL/CMOS level receiver outputs. ROUTB TTL/CMOS level, noninverting, always enabled receiver outputs. INVALID 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 ICL32XXE 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). 3 ICL3224E, ICL3226E, ICL3244E Typical Operating Circuits ICL3224E +3.3V C1 0.1µF C2 0.1µF T1IN T2IN TTL/CMOS LOGIC LEVELS R1OUT R2OUT + 0.1µF 2 + 4 5 + 6 19 C1+ VCC V+ C1C2+ V- 7 C2T1 13 17 T2 12 8 15 16 R1 5kΩ R2 5kΩ 10 9 1 READY 14 3 FORCEOFF INVALID FORCEON 20 11 + C3 0.1µF C4 0.1µF + T1OUT T2OUT R1IN RS-232 LEVELS R2IN VCC TO POWER CONTROL LOGIC GND 18 ICL3226E +3.3V + 15 0.1µF C1 0.1µF C2 0.1µF TTL/CMOS LOGIC LEVELS T1IN R1OUT 2 + 4 C1+ 3 VCC V+ C15 C2+ + 6 C2- V- 7 13 9 1 8 READY 16 FORCEON GND INVALID 14 4 T1OUT R1IN RS-232 LEVELS 5kΩ R1 FORCEOFF 12 C4 + 0.1µF T1 11 + C3 0.1µF 10 VCC TO POWER CONTROL LOGIC ICL3224E, ICL3226E, ICL3244E Typical Operating Circuits (Continued) ICL3244E +3.3V C1 0.1µF C2 0.1µF + 0.1µF 28 + C1+ 26 VCC 24 C11 C2+ + 2 C2- 27 VT1 14 + V+ 3 C4 0.1µF + 9 T1IN T2IN C3 0.1µF T1OUT 13 T2 12 T3 10 T2OUT RS-232 LEVELS 11 T3IN T3OUT 20 R2OUTB TTL/CMOS LOGIC LEVELS 19 4 R1OUT R1IN R1 R2OUT 5kΩ 18 5 R2 17 6 R3OUT R3IN R3 5kΩ 16 7 R4OUT R4IN R4 5kΩ R5 FORCEON 5kΩ 15 R5OUT 23 VCC TO POWER CONTROL LOGIC 8 22 FORCEOFF 21 INVALID GND 25 5 R2IN 5kΩ R5IN RS-232 LEVELS ICL3224E, ICL3226E, ICL3244E m Absolute Maximum Ratings Thermal Information VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V Input Voltages TIN, FORCEOFF, FORCEON. . . . . . . . . . . . . . . . . . . -0.3V to 6V RIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V Output Voltages TOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V ROUT, INVALID, READY. . . . . . . . . . . . . . . . . -0.3V to VCC +0.3V Short Circuit Duration TOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table Thermal Resistance (Typical, Note 1) θJA (°C/W) 28 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . 75 16 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 140 20 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 125 28 Ld SSOP Package . . . . . . . . . . . . . . . . . . . . . . . 100 Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C (Lead Tips Only) Operating Conditions Temperature Range ICL32XXEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C ICL32XXEI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. θJA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details. Test Conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1µF; Unless Otherwise Specified. Typicals are at TA = 25°C Electrical Specifications PARAMETER TEST CONDITIONS TEMP (°C) MIN TYP MAX UNITS DC CHARACTERISTICS Supply Current, Automatic Powerdown All RIN Open, FORCEON = GND, FORCEOFF = VCC 25 - 1.0 10 µA Supply Current, Powerdown FORCEOFF = GND 25 - 1.0 10 µA Supply Current, Automatic Powerdown Disabled All Outputs Unloaded, FORCEON = FORCEOFF = VCC 25 - 0.3 1.0 mA Full - - 0.8 V VCC = 3.3V Full 2.0 - - V VCC = 5.0V Full 2.4 - - V 25 - 0.5 - V LOGIC AND TRANSMITTER INPUTS AND RECEIVER OUTPUTS Input Logic Threshold Low TIN, FORCEON, FORCEOFF Input Logic Threshold High TIN, FORCEON, FORCEOFF Transmitter Input Hysteresis Input Leakage Current TIN, FORCEON, FORCEOFF Full - ±0.01 ±1.0 µA Output Leakage Current FORCEOFF = GND, ICL3244E Only Full - ±0.05 ±10 µA Output Voltage Low IOUT = 1.6mA Full - - 0.4 V Output Voltage High IOUT = -1.0mA Full - V VCC -0.6 VCC -0.1 RECEIVER INPUTS Input Voltage Range Input Threshold Low 6 Full -25 - 25 V VCC = 3.3V 25 0.6 1.2 - V VCC = 5.0V 25 0.8 1.5 - V ICL3224E, ICL3226E, ICL3244E Test Conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1µF; Unless Otherwise Specified. Typicals are at TA = 25°C (Continued) Electrical Specifications TEMP (°C) MIN TYP MAX UNITS VCC = 3.3V 25 - 1.5 2.4 V VCC = 5.0V 25 - 1.8 2.4 V Input Hysteresis 25 - 0.5 - V Input Resistance 25 3 5 7 kΩ PARAMETER TEST CONDITIONS Input Threshold High TRANSMITTER OUTPUTS Output Voltage Swing All Transmitter Outputs Loaded with 3kΩ to Ground Full ±5.0 ±5.4 - V Output Resistance VCC = V+ = V- = 0V, Transmitter Output = ±2V Full 300 10M - Ω Full - ±35 ±60 mA Full - - ±25 µA Full ±5 - - V Output Short-Circuit Current VOUT = ±12V, VCC = 0V or 3V to 5.5V Automatic Powerdown or FORCEOFF = GND Output Leakage Current MOUSE DRIVEABILITY (ICL3244E Only) T1IN = T2IN = GND, T3IN = VCC, T3OUT Loaded with 3kΩ to GND, T1OUT and T2OUT Loaded with 2.5mA Each Transmitter Output Voltage (See Figure 11) ENHANCED AUTOMATIC POWERDOWN (FORCEON = GND, FORCEOFF = VCC) Receiver Input Thresholds to INVALID High See Figure 6 Full -2.7 - 2.7 V Receiver Input Thresholds to INVALID Low See Figure 6 Full -0.3 - 0.3 V INVALID, READY Output Voltage IOUT = 1.6mA Low Full - - 0.4 V INVALID, READY Output Voltage IOUT = -1.0mA High Full VCC-0.6 - - V Receiver Positive or Negative Threshold to INVALID High Delay (tINVH) 25 - 1 - µs Receiver Positive or Negative Threshold to INVALID Low Delay (tINVL) 25 - 30 - µs Receiver or Transmitter Edge to Note 2 Transmitters Enabled Delay (tWU) 25 - 100 - µs Note 2 Full 15 30 60 sec Maximum Data Rate RL = 3kΩ, CL = 1000pF, One Transmitter Switching Full 250 500 - kbps Receiver Propagation Delay Receiver Input to Receiver Output, CL = 150pF tPHL 25 - 0.15 - µs tPLH 25 - 0.15 - µs Receiver or Transmitter Edge to Transmitters Disabled Delay (tAUTOPWDN) TIMING CHARACTERISTICS Receiver Output Enable Time Normal Operation (ICL3244E Only) 25 - 200 - ns Receiver Output Disable Time Normal Operation (ICL3244E Only) 25 - 200 - ns Transmitter Skew tPHL - tPLH 25 - 100 - ns 7 ICL3224E, ICL3226E, ICL3244E Test Conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1µF; Unless Otherwise Specified. Typicals are at TA = 25°C (Continued) Electrical Specifications TEMP (°C) MIN TYP MAX UNITS 25 - 50 - ns CL = 150pF to 1000pF 25 6 - 30 V/µs CL = 150pF to 2500pF 25 4 8 30 V/µs Human Body Model 25 - ±15 - kV IEC61000-4-2 Contact Discharge 25 - ±8 - kV IEC61000-4-2 Air Gap Discharge 25 - ±15 - kV Human Body Model 25 - ±3 - kV PARAMETER TEST CONDITIONS Receiver Skew tPHL - tPLH Transition Region Slew Rate VCC = 3.3V, RL = 3kΩ to 7kΩ, Measured From 3V to -3V or -3V to 3V ESD PERFORMANCE RS-232 Pins (TOUT, RIN) All Other Pins NOTE: 2. An “edge” is defined as a transition through the transmitter or receiver input thresholds. Detailed Description These ICL32XXE interface ICs operate from a single +3V to +5.5V supply, guarantee a 250kbps minimum data rate, require only four small external 0.1µF capacitors, feature low power consumption, and meet all ElA RS-232C and V.28 specifications. The circuit is divided into three sections: The charge pump, the transmitters, and the receivers. Charge-Pump Intersil’s new ICL32XXE family utilizes regulated on-chip dual charge pumps as voltage doublers, and voltage inverters to generate ±5.5V transmitter supplies from a VCC supply as low as 3.0V. This allows these devices to maintain RS-232 compliant output levels over the ±10% tolerance range of 3.3V powered systems. The efficient on-chip power supplies require only four small, external 0.1µF capacitors for the voltage doubler and inverter functions at VCC = 3.3V. See the “Capacitor Selection” section, and Table 3 for capacitor recommendations for other operating conditions. The charge pumps operate discontinuously (i.e., they turn off as soon as the V+ and V- supplies are pumped up to the nominal values), resulting in significant power savings. Transmitters All devices guarantee a 250kbps data rate for full load conditions (3kΩ and 1000pF), VCC ≥ 3.0V, with one transmitter operating at full speed. Under more typical conditions of VCC ≥ 3.3V, RL = 3kΩ, and CL = 250pF, one transmitter easily operates at 1Mbps. Transmitter inputs float if left unconnected, and may cause ICC increases. Connect unused inputs to GND for the best performance. Receivers All the ICL32XXE devices contain standard inverting receivers, but only the ICL3244E receivers can three-state, via the FORCEOFF control line. Additionally, the ICL3244E includes a noninverting (monitor) receiver (denoted by the ROUTB label) that is always active, regardless of the state of any control lines. Both receiver types convert RS-232 signals to CMOS output levels and accept inputs up to ±25V while presenting the required 3kΩ to 7kΩ input impedance (see Figure 1) even if the power is off (VCC = 0V). The receivers’ Schmitt trigger input stage uses hysteresis to increase noise immunity and decrease errors due to slow input signal transitions. VCC The transmitters are proprietary, low dropout, inverting drivers that translate TTL/CMOS inputs to EIA/TIA-232 output levels. Coupled with the on-chip ±5.5V supplies, these transmitters deliver true RS-232 levels over a wide range of single supply system voltages. Transmitter outputs disable and assume a high impedance state when the device enters the powerdown mode (see Table 2). These outputs may be driven to ±12V when disabled. 8 RXOUT RXIN -25V ≤ VRIN ≤ +25V 5kΩ GND ≤ VROUT ≤ VCC GND FIGURE 1. INVERTING RECEIVER CONNECTIONS ICL3224E, ICL3226E, ICL3244E The ICL3244E inverting receivers disable during forced (manual) powerdown, but not during automatic powerdown (see Table 2). Conversely, the monitor receiver remains active even during manual powerdown making it extremely useful for Ring Indicator monitoring. Standard receivers driving powered down peripherals must be disabled to prevent current flow through the peripheral’s protection diodes (see Figures 2 and 3). This renders them useless for wake up functions, but the corresponding monitor receiver can be dedicated to this task as shown in Figure 3. TABLE 2. POWERDOWN LOGIC TRUTH TABLE RCVR OR XMTR EDGE WITHIN 30 SEC? (NOTE 3) FORCEOFF FORCEON TRANSMITTER RECEIVER ROUTB INPUT INPUT OUTPUTS OUTPUTS OUTPUTS RS-232 LEVEL PRESENT AT RECEIVER INPUT? INVALID OUTPUT MODE OF OPERATION ICL3224E, ICL3226E NO H H Active Active N.A. NO L NO H H Active Active N.A. YES H YES H L Active Active N.A. NO L YES H L Active Active N.A. YES H NO H L High-Z Active N.A. NO L NO H L High-Z Active N.A. YES H X L X High-Z Active N.A. NO L X L X High-Z Active N.A. YES H Normal Operation (Enhanced Auto Powerdown Disabled) Normal Operation (Enhanced Auto Powerdown Enabled) Powerdown Due to Enhanced Auto Powerdown Logic Manual Powerdown ICL322XE - INVALID DRIVING FORCEON AND FORCEOFF (EMULATES AUTOMATIC POWERDOWN) X NOTE 4 NOTE 4 Active Active N.A. YES H Normal Operation X NOTE 4 NOTE 4 High-Z Active N.A. NO L Forced Auto Powerdown NO H H Active Active Active NO L NO H H Active Active Active YES H Normal Operation (Enhanced Auto Powerdown Disabled) YES H L Active Active Active NO L YES H L Active Active Active YES H NO H L High-Z Active Active NO L NO H L High-Z Active Active YES H X L X High-Z High-Z Active NO L X L X High-Z High-Z Active YES H ICL3244E Normal Operation (Enhanced Auto Powerdown Enabled) Powerdown Due to Enhanced Auto Powerdown Logic Manual Powerdown ICL3244E - INVALID DRIVING FORCEON AND FORCEOFF (EMULATES AUTOMATIC POWERDOWN) X NOTE 4 NOTE 4 Active Active Active YES H Normal Operation X NOTE 4 NOTE 4 High-Z High-Z Active NO L Forced Auto Powerdown NOTES: 3. Applies only to the ICL3244E. 4. Input is connected to INVALID Output. 9 ICL3224E, ICL3226E, ICL3244E VCC active and powerdown modes, under logic or software control, only the FORCEOFF input need be driven. The FORCEON state isn’t critical, as FORCEOFF dominates over FORCEON. Nevertheless, if strictly manual control over powerdown is desired, the user must strap FORCEON high to disable the enhanced automatic powerdown circuitry. ICL3244E inverting (standard) receiver outputs also disable when the device is in powerdown, thereby eliminating the possible current path through a shutdown peripheral’s input protection diode (see Figures 2 and 3). VCC CURRENT FLOW VCC VOUT = VCC Rx POWERED DOWN UART Tx SHDN = GND GND Connecting FORCEOFF and FORCEON together disables the enhanced automatic powerdown feature, enabling them to function as a manual SHUTDOWN input (see Figure 4). OLD RS-232 CHIP FORCEOFF FIGURE 2. POWER DRAIN THROUGH POWERED DOWN PERIPHERAL PWR MGT LOGIC FORCEON VCC INVALID ICL32XXE TRANSITION DETECTOR TO WAKE-UP LOGIC VCC ICL3244E I/O UART R2OUTB RX VOUT = HI-Z R2OUT POWERED DOWN TX UART CPU R2IN T1IN T1OUT FORCEOFF = GND FIGURE 3. DISABLED RECEIVERS PREVENT POWER DRAIN Powerdown Functionality This 3V family of RS-232 interface devices requires a nominal supply current of 0.3mA during normal operation (not in powerdown mode). This is considerably less than the 5mA to 11mA current required of 5V RS-232 devices. The already low current requirement drops significantly when the device enters powerdown mode. In powerdown, supply current drops to 1µA, because the on-chip charge pump turns off (V+ collapses to VCC, V- collapses to GND), and the transmitter outputs three-state. Inverting receiver outputs may or may not disable in powerdown; refer to Table 2 for details. This micro-power mode makes these devices ideal for battery powered and portable applications. Software Controlled (Manual) Powerdown These devices allow the user to force the IC into the low power, standby state, and utilize a two pin approach where the FORCEON and FORCEOFF inputs determine the IC’s mode. For always enabled operation, FORCEON and FORCEOFF are both strapped high. To switch between 10 FIGURE 4. CONNECTIONS FOR MANUAL POWERDOWN WHEN NO VALID RECEIVER SIGNALS ARE PRESENT With any of the above control schemes, the time required to exit powerdown, and resume transmission is only 100µs. When using both manual and enhanced automatic powerdown (FORCEON = 0), the ICL32XXE won’t power up from manual powerdown until both FORCEOFF and FORCEON are driven high, or until a transition occurs on a receiver or transmitter input. Figure 5 illustrates a circuit for ensuring that the ICL32XXE powers up as soon as FORCEOFF switches high. The rising edge of the Master Powerdown signal forces the device to power up, and the ICL32XXE returns to enhanced automatic powerdown mode an RC time constant after this rising edge. The time constant isn’t critical, because the ICL32XXE remains powered up for 30 seconds after the FORCEON falling edge, even if there are no signal transitions. This gives slow-to-wake systems (e.g., a mouse) plenty of time to start transmitting, and as long as it starts transmitting within 30 seconds both systems remain enabled. ICL3224E, ICL3226E, ICL3244E POWER MANAGEMENT UNIT MASTER POWERDOWN LINE 0.1µF FORCEOFF 1MΩ FORCEON ICL32XXE FIGURE 5. CIRCUIT TO ENSURE IMMEDIATE POWER UP WHEN EXITING FORCED POWERDOWN INVALID Output The INVALID output always indicates (see Table 2) whether or not 30µs have elapsed with invalid RS-232 signals (see Figures 6 and 8) persisting on all of the receiver inputs, giving the user an easy way to determine when the interface block should power down. Invalid receiver levels occur whenever the driving peripheral’s outputs are shut off (powered down) or when the RS-232 interface cable is disconnected. In the case of a disconnected interface cable where all the receiver inputs are floating (but pulled to GND by the internal receiver pull down resistors), the INVALID logic detects the invalid levels and drives the output low. The power management logic then uses this indicator to power down the interface block. Reconnecting the cable restores valid levels at the receiver inputs, INVALID switches high, and the power management logic wakes up the interface block. INVALID can also be used to indicate the DTR or RING INDICATOR signal, as long as the other receiver inputs are floating, or driven to GND (as in the case of a powered down driver). VALID RS-232 LEVEL - INVALID = 1 2.7V INDETERMINATE 0.3V INVALID LEVEL - INVALID = 0 whenever it detects a transition on one of these inputs. This automatic powerdown feature provides additional system power savings without changes to the existing operating system. Enhanced automatic powerdown operates when the FORCEON input is low, and the FORCEOFF input is high. Tying FORCEON high disables automatic powerdown, but manual powerdown is always available via the overriding FORCEOFF input. Table 2 summarizes the enhanced automatic powerdown functionality. Figure 7 illustrates the enhanced powerdown control logic. Note that once the ICL32XXE enters powerdown (manually or automatically), the 30 second timer remains timed out (set), keeping the ICL32XXE powered down until FORCEON transitions high, or until a transition occurs on a receiver or transmitter input. FORCEOFF T_IN EDGE DETECT S 30s TIMER R_IN AUTOSHDN R EDGE DETECT FORCEON FIGURE 7. ENHANCED AUTOMATIC POWERDOWN LOGIC The INVALID output signal switches low to indicate that invalid levels have persisted on all of the receiver inputs for more than 30µs (see Figure 8), but this has no direct effect on the state of the ICL32XXE (see the next sections for methods of utilizing INVALID to power down the device). INVALID switches high 1µs after detecting a valid RS-232 level on a receiver input. INVALID operates in all modes (forced or automatic powerdown, or forced on), so it is also useful for systems employing manual powerdown circuitry. -0.3V INDETERMINATE The time to recover from automatic powerdown mode is typically 100µs. Emulating Standard Automatic Powerdown -2.7V VALID RS-232 LEVEL - INVALID = 1 FIGURE 6. DEFINITION OF VALID RS-232 RECEIVER LEVELS Enhanced Automatic Powerdown Even greater power savings is available by using these devices which feature an enhanced automatic powerdown function. When the enhanced powerdown logic determines that no transitions have occurred on any of the transmitter nor receiver inputs for 30 seconds, the charge pump and transmitters powerdown, thereby reducing supply current to 1µA. The ICL32XXE automatically powers back up 11 If enhanced automatic powerdown isn’t desired, the user can implement the standard automatic powerdown feature (mimics the function on the ICL3221E/23E/43E) by connecting the INVALID output to the FORCEON and FORCEOFF inputs, as shown in Figure 9. After 30µs of invalid receiver levels, INVALID switches low and drives the ICL32XXE into a forced powerdown condition. INVALID switches high as soon as a receiver input senses a valid RS-232 level, forcing the ICL32XXE to power on. See the “INVALID DRIVING FORCEON AND FORCEOFF” section of Table 2 for an operational summary. This operational mode is perfect for handheld devices that communicate with ICL3224E, ICL3226E, ICL3244E RECEIVER INPUTS } INVALID REGION TRANSMITTER INPUTS TRANSMITTER OUTPUTS tINVH INVALID OUTPUT tINVL tAUTOPWDN tAUTOPWDN tWU tWU READY OUTPUT V+ VCC 0 V- FORCEOFF INVALID another computer via a detachable cable. Detaching the cable allows the internal receiver pull-down resistors to pull the inputs to GND (an invalid RS-232 level), causing the 30µs timer to time-out and drive the IC into powerdown. Reconnecting the cable restores valid levels, causing the IC to power back up. FORCEON FIGURE 8. ENHANCED AUTOMATIC POWERDOWN, INVALID AND READY TIMING DIAGRAMS ICL32XXE Hybrid Automatic Powerdown Options For devices which communicate only through a detachable cable, connecting INVALID to FORCEOFF (with FORCEON = 0) may be a desirable configuration. While the cable is attached INVALID and FORCEOFF remain high, so the enhanced automatic powerdown logic powers down the RS-232 device whenever there is 30 seconds of inactivity on the receiver and transmitter inputs. Detaching the cable allows the receiver inputs to drop to an invalid level (GND), so INVALID switches low and forces the RS-232 device to power down. The ICL32XXE remains powered down until the cable is reconnected (INVALID = FORCEOFF = 1) and a transition occurs on a receiver or transmitter input (see Figure 7). For immediate power up when the cable is reattached, connect FORCEON to FORCEOFF through a network similar to that shown in Figure 5. I/O UART CPU FIGURE 9. CONNECTIONS FOR AUTOMATIC POWERDOWN WHEN NO VALID RECEIVER SIGNALS ARE PRESENT Ready Output (ICL3224E and ICL3226E only) The Ready output indicates that the ICL322XE is ready to transmit. Ready switches low whenever the device enters powerdown, and switches back high during power-up when V- reaches -4V or lower. Capacitor Selection The charge pumps require 0.1µF capacitors for 3.3V operation. For other supply voltages refer to Table 3 for capacitor values. Do not use values smaller than those listed in Table 3. Increasing the capacitor values (by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without increasing C1’s value, however, do not increase C1 without also increasing C2, C3, and C4 to maintain the proper ratios (C1 to the other capacitors). 12 ICL3224E, ICL3226E, ICL3244E TABLE 3. REQUIRED CAPACITOR VALUES VCC (V) C1 (µF) C2, C3, C4 (µF) 3.0 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.1 0.47 Power Supply Decoupling In most circumstances a 0.1µF bypass capacitor is adequate. In applications that are particularly sensitive to power supply noise, decouple VCC to ground with a capacitor of the same value as the charge-pump capacitor C1. Connect the bypass capacitor as close as possible to the IC. Mouse Driveability The ICL3244E is specifically designed to power a serial mouse while operating from low voltage supplies. Figure 11 shows the transmitter output voltages under increasing load current. The on-chip switching regulator ensures the transmitters will supply at least ±5V during worst case conditions (15mA for paralleled V+ transmitters, 7.3mA for single V- transmitter). 6 TRANSMITTER OUTPUT VOLTAGE (V) When using minimum required capacitor values, make sure that capacitor values do not degrade excessively with temperature. If in doubt, use capacitors with a larger nominal value. The capacitor’s equivalent series resistance (ESR) usually rises at low temperatures and it influences the amount of ripple on V+ and V-. 5 VOUT+ 4 3 VCC = 3.0V 2 1 T1 0 VOUT+ -1 T2 -2 ICL3244E -3 VCC -4 T3 -5 1 2 3 4 6 5 7 8 9 10 LOAD CURRENT PER TRANSMITTER (mA) ICL32XXE transmitter outputs meet RS-562 levels (±3.7V), at full data rate, with VCC as low as 2.7V. RS-562 levels typically ensure inter operability with RS-232 devices. FIGURE 11. TRANSMITTER OUTPUT VOLTAGE vs LOAD CURRENT (PER TRANSMITTER, i.e., DOUBLE CURRENT AXIS FOR TOTAL VOUT+ CURRENT) High Data Rates Transmitter Outputs when Exiting Powerdown Figure 10 shows the response of two transmitter outputs when exiting powerdown mode. As they activate, the two transmitter outputs properly go to opposite RS-232 levels, with no glitching, ringing, nor undesirable transients. Each transmitter is loaded with 3kΩ in parallel with 2500pF. Note that the transmitters enable only when the magnitude of the supplies exceed approximately 3V. The ICL32XXE maintain the RS-232 ±5V minimum transmitter output voltages even at high data rates. Figure 12 details a transmitter loopback test circuit, and Figure 13 illustrates the loopback test result at 120kbps. For this test, all transmitters were simultaneously driving RS-232 loads in parallel with 1000pF, at 120kbps. Figure 14 shows the loopback results for a single transmitter driving 1000pF and an RS-232 load at 250kbps. The static transmitters were also loaded with an RS-232 receiver. VCC 5V/DIV. VOUT - -6 0 Operation Down to 2.7V VOUT - + 0.1µF FORCEOFF T1 + VCC = +3.3V C1 - C4 = 0.1µF VCC C1+ V+ C1 C1- + C3 ICL32XXE 2V/DIV. + V- C2+ C2 C4 + C2TIN T2 5V/DIV. ROUT READY TIME (20µs/DIV.) FIGURE 10. TRANSMITTER OUTPUTS WHEN EXITING POWERDOWN FORCEON VCC TOUT RIN 1000pF 5K FORCEOFF FIGURE 12. TRANSMITTER LOOPBACK TEST CIRCUIT 13 ICL3224E, ICL3226E, ICL3244E ±15kV ESD Protection 5V/DIV. All pins on ICL32XX devices include ESD protection structures, but the ICL32XXE family incorporates advanced structures which allow the RS-232 pins (transmitter outputs and receiver inputs) to survive ESD events up to ±15kV. The RS-232 pins are particularly vulnerable to ESD damage because they typically connect to an exposed port on the exterior of the finished product. Simply touching the port pins, or connecting a cable, can cause an ESD event that might destroy unprotected ICs. These new ESD structures protect the device whether or not it is powered up, protect without allowing any latchup mechanism to activate, and don’t interfere with RS-232 signals as large as ±25V. T1IN T1OUT R1OUT VCC = +3.3V C1 - C4 = 0.1µF 5µs/DIV. FIGURE 13. LOOPBACK TEST AT 120kbps Human Body Model (HBM) Testing As the name implies, this test method emulates the ESD event delivered to an IC during human handling. The tester delivers the charge through a 1.5kΩ current limiting resistor, making the test less severe than the IEC61000 test which utilizes a 330Ω limiting resistor. The HBM method determines an ICs ability to withstand the ESD transients typically present during handling and manufacturing. Due to the random nature of these events, each pin is tested with respect to all other pins. The RS-232 pins on “E” family devices can withstand HBM ESD events to ±15kV. 5V/DIV. T1IN T1OUT IEC61000-4-2 Testing R1OUT VCC = +3.3V C1 - C4 = 0.1µF 2µs/DIV. FIGURE 14. LOOPBACK TEST AT 250kbps Interconnection with 3V and 5V Logic The ICL32XXE directly interfaces with 5V CMOS and TTL logic families. Nevertheless, with the ICL32XX at 3.3V, and the logic supply at 5V, AC, HC, and CD4000 outputs can drive ICL32XX inputs, but ICL32XX outputs do not reach the minimum VIH for these logic families. See Table 4 for more information. TABLE 4. LOGIC FAMILY COMPATIBILITY WITH VARIOUS SUPPLY VOLTAGES VCC SYSTEM POWER-SUPPLY SUPPLY VOLTAGE VOLTAGE (V) (V) 3.3 3.3 5 5 5 3.3 The IEC 61000 test method applies to finished equipment, rather than to an individual IC. Therefore, the pins most likely to suffer an ESD event are those that are exposed to the outside world (the RS-232 pins in this case), and the IC is tested in its typical application configuration (power applied) rather than testing each pin-to-pin combination. The lower current limiting resistor coupled with the larger charge storage capacitor yields a test that is much more severe than the HBM test. The extra ESD protection built into this device’s RS-232 pins allows the design of equipment meeting level 4 criteria without the need for additional board level protection on the RS-232 port. AIR-GAP DISCHARGE TEST METHOD For this test method, a charged probe tip moves toward the IC pin until the voltage arcs to it. The current waveform delivered to the IC pin depends on approach speed, humidity, temperature, etc., so it is difficult to obtain repeatable results. The “E” device RS-232 pins withstand ±15kV air-gap discharges. CONTACT DISCHARGE TEST METHOD COMPATIBILITY Compatible with all CMOS families. Compatible with all TTL and CMOS logic families. Compatible with ACT and HCT CMOS, and with TTL. ICL32XX outputs are incompatible with AC, HC, and CD4000 CMOS inputs. 14 During the contact discharge test, the probe contacts the tested pin before the probe tip is energized, thereby eliminating the variables associated with the air-gap discharge. The result is a more repeatable and predictable test, but equipment limits prevent testing devices at voltages higher than ±8kV. All “E” family devices survive ±8kV contact discharges on the RS-232 pins. ICL3224E, ICL3226E, ICL3244E Typical Performance Curves VCC = 3.3V, TA = 25°C 25 VOUT+ 4 20 SLEW RATE (V/µs) TRANSMITTER OUTPUT VOLTAGE (V) 6 2 1 TRANSMITTER AT 250kbps OTHER TRANSMITTERS AT 30kbps 0 -2 -SLEW 15 +SLEW 10 -4 VOUT - -6 0 1000 2000 3000 4000 5 5000 0 1000 3000 FIGURE 15. TRANSMITTER OUTPUT VOLTAGE vs LOAD CAPACITANCE 5000 FIGURE 16. SLEW RATE vs LOAD CAPACITANCE 35 40 ICL3226E ICL3224E 30 35 SUPPLY CURRENT (mA) 250kbps 30 25 120kbps 20 15 20kbps 250kbps 25 20 120kbps 15 10 20kbps 5 10 0 5 0 1000 2000 3000 4000 0 5000 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF) FIGURE 17. SUPPLY CURRENT vs LOAD CAPACITANCE WHEN TRANSMITTING DATA FIGURE 18. SUPPLY CURRENT vs LOAD CAPACITANCE WHEN TRANSMITTING DATA 3.5 45 NO LOAD ALL OUTPUTS STATIC ICL3244E 40 3.0 250kbps 35 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 4000 LOAD CAPACITANCE (pF) LOAD CAPACITANCE (pF) SUPPLY CURRENT (mA) 2000 30 120kbps 25 20 20kbps 15 2.5 2.0 1.5 1.0 0.5 10 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) FIGURE 19. SUPPLY CURRENT vs LOAD CAPACITANCE WHEN TRANSMITTING DATA 15 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) FIGURE 20. SUPPLY CURRENT vs SUPPLY VOLTAGE 6.0 ICL3224E, ICL3226E, ICL3244E Die Characteristics SUBSTRATE POTENTIAL (POWERED UP) GND TRANSISTOR COUNT ICL3224E: 937 ICL3226E: 825 ICL3244E: 1109 PROCESS Si Gate CMOS 16 ICL3224E, ICL3226E, ICL3244E Shrink Small Outline Plastic Packages (SSOP) M20.209 (JEDEC MO-150-AE ISSUE B) N 20 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE INDEX AREA H 0.25(0.010) M B M INCHES E -B1 2 3 0.25 0.010 SEATING PLANE -A- SYMBOL GAUGE PLANE A D -C- α e C 0.10(0.004) C A M B S MILLIMETERS MIN MAX NOTES A 0.068 0.078 1.73 1.99 0.002 0.008’ 0.05 0.21 A2 0.066 0.070’ 1.68 1.78 B 0.010’ 0.015 0.25 0.38 C 0.004 0.008 0.09 0.20’ D 0.278 0.289 7.07 7.33 3 E 0.205 0.212 5.20’ 5.38 4 0.026 BSC 0.301 0.311 7.65 7.90’ L 0.025 0.037 0.63 0.95 8 deg. 0 deg. N 20 0 deg. 9 0.65 BSC H α NOTES: MAX A1 e A2 A1 B 0.25(0.010) M L MIN 6 20 7 8 deg. Rev. 3 11/02 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.20mm (0.0078 inch) per side. 4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.20mm (0.0078 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. “L” is the length of terminal for soldering to a substrate. 7. “N” is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. Dimension “B” does not include dambar protrusion. Allowable dambar protrusion shall be 0.13mm (0.005 inch) total in excess of “B” dimension at maximum material condition. 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 17 ICL3224E, ICL3226E, ICL3244E Small Outline Plastic Packages (SSOP) M16.209 (JEDEC MO-150-AC ISSUE B) N INDEX AREA 16 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE H 0.25(0.010) M 2 GAUGE PLANE 3 0.25 0.010 SEATING PLANE -A- INCHES E -B- 1 B M A D -C- α e C 0.10(0.004) C A M SYMBOL MIN MAX MIN MAX NOTES A - 0.078 - 2.00 - A1 0.002 - 0.05 - - A2 0.065 0.072 1.65 1.85 - B 0.009 0.014 0.22 0.38 9 C 0.004 0.009 0.09 0.25 - D 0.233 0.255 5.90 6.50 3 E 0.197 0.220 5.00 5.60 4 e A2 A1 B 0.25(0.010) M L B S 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.20mm (0.0078 inch) per side. 4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.20mm (0.0078 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. “L” is the length of terminal for soldering to a substrate. 7. “N” is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. Dimension “B” does not include dambar protrusion. Allowable dambar protrusion shall be 0.13mm (0.005 inch) total in excess of “B” dimension at maximum material condition. 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 18 0.026 BSC H 0.292 L 0.022 N α NOTES: MILLIMETERS 0.65 BSC 0.322 7.40 0.037 0.55 16 0° - 8.20 - 0.95 6 16 8° 0° 7 8° Rev. 3 6/05 ICL3224E, ICL3226E, ICL3244E Shrink Small Outline Plastic Packages (SSOP) M28.209 (JEDEC MO-150-AH ISSUE B) N INDEX AREA 28 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE H 0.25(0.010) M 2 GAUGE PLANE 3 0.25 0.010 SEATING PLANE -A- INCHES E -B- 1 B M A D -C- α e C 0.10(0.004) C A M SYMBOL MIN MAX MIN MAX NOTES A - 0.078 - 2.00 - A1 0.002 - 0.05 - - A2 0.065 0.072 1.65 1.85 - B 0.009 0.014 0.22 0.38 9 C 0.004 0.009 0.09 0.25 - D 0.390 0.413 9.90 10.50 3 E 0.197 0.220 5.00 5.60 4 e A2 A1 B 0.25(0.010) M L B S NOTES: 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.20mm (0.0078 inch) per side. 4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.20mm (0.0078 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. “L” is the length of terminal for soldering to a substrate. 7. “N” is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. Dimension “B” does not include dambar protrusion. Allowable dambar protrusion shall be 0.13mm (0.005 inch) total in excess of “B” dimension at maximum material condition. 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 19 0.026 BSC H 0.292 L 0.022 N α 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. MILLIMETERS 0.65 BSC 0.322 7.40 0.037 0.55 28 0° - 0.95 6 28 8° 0° - 8.20 7 8° Rev. 2 6/05 ICL3224E, ICL3226E, ICL3244E Small Outline Plastic Packages (SOIC) M28.3 (JEDEC MS-013-AE ISSUE C) N 28 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE INDEX AREA H 0.25(0.010) M B M INCHES E SYMBOL -B- 1 2 3 L SEATING PLANE -A- h x 45o A D -C- e A1 B C 0.10(0.004) 0.25(0.010) M C A M B S MIN MAX NOTES A 0.0926 0.1043 2.35 2.65 - 0.0040 0.0118 0.10 0.30 - B 0.013 0.0200 0.33 0.51 9 C 0.0091 0.0125 0.23 0.32 - D 0.6969 0.7125 17.70 18.10 3 E 0.2914 0.2992 7.40 7.60 4 0.05 BSC 1.27 BSC - H 0.394 0.419 10.00 10.65 - h 0.01 0.029 0.25 0.75 5 L 0.016 0.050 0.40 1.27 6 8o 0o N α NOTES: MILLIMETERS MAX A1 e α MIN 28 0o 28 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. 7 8o Rev. 0 12/93 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. “L” is the length of terminal for soldering to a substrate. 7. “N” is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch) 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 20