DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander General Description Features The AAT4296/98 SmartSwitch is a member of Skyworks' Application Specific Power MOSFET (ASPM™) product family. The AAT4296/98 is comprised of five/six push/pull output switches that gate each respective output between a common input supply and ground. This device is targeted for I/O expansion applications, but can also be used for a combination of general purposes to simplify power switching with an off state load discharge. • VIN Range: 1.8V to 5.5V • Independent Push/Pull Channels - AAT4296: Five Channels - AAT4298: Six Channels • User-Programmable Interface • Single GPIO Controls State of Each Output • Optional Fast Auto-Discharge • Low Quiescent Current: 3μA Typical • Temperature Range: -40°C to +85°C • Available in Pb-Free Packages: - AAT4296: 8-Pin SC70JW - AAT4298: 10-Pin SC70JW and 12-Pin TSOPJW The AAT4296/98 operates over an input voltage range of 1.8V to 5.5V, making it ideal for battery-powered applications. The state of each output channel is controlled with a single GPIO via the EN/SET pin using Skyworks Simple Serial Control (S2Cwire™) interface. When EN/ SET is pulled to logic high, the device is enabled and consumes 3μA of typical quiescent current. In the off state, each output is pulled low to ground to affect a logic low state for I/O expander or power switching applications; this circuit will act as a load discharge function to rapidly turn off a load circuit. Applications • • • • Cell Phones Multiple Low Power Switching Personal Communication Devices Portable Electronic Devices Rated over the -40°C to +85°C temperature range, the AAT4296 is offered in a Pb-free 8-pin SC70JW package, and the AAT4298 is offered in both a Pb-free 10-pin SC70JW and a Pb-free 12-pin TSOPJW package. Typical Application VCC Input VCC OUT1 OUT 1 OUT2 OUT 2 AAT4298 EN/SET Input EN/SET OUT3 OUT 3 OUT4 OUT 4 OUT5 OUT 5 OUT6 OUT 6 GND Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 1 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Pin Descriptions Pin # AAT4296 AAT4298 SC70JW-10 AAT4298 TSOPJW-12 Symbol 1 2 3 7 8 9 8 9 10 VCC OUT2 OUT1 4 10 11 EN/SET 5 6 7 8 N/A N/A 1 3 4 5 6 2 2 3 4 5 7 1, 6, 12 GND OUT5 OUT4 OUT3 OUT6 N/C Function Input supply voltage. Channel 2 output pin. Channel 1 output pin. Input control pin using S2Cwire serial interface. The device records rising edges of the clock and decodes them into 32 (AAT4296) or 64 (AAT4298) states controlling the ON/OFF states of the outputs. See Table 1 for output settings. In addition, a logic low forces the device into shutdown mode, reducing the supply current to less than 1μA. This pin should not be left floating. Ground. Channel 5 output pin. Channel 4 output pin. Channel 3 output pin. Channel 6 output pin. Not connected. Pin Configuration AAT4296 SC70JW-8 (Top View) VCC OUT2 OUT1 EN/SET 2 1 8 2 7 3 6 4 5 AAT4298 SC70JW-10 (Top View) OUT3 OUT4 OUT5 GND GND N/C OUT5 OUT4 OUT3 1 10 2 9 3 8 4 7 5 6 EN/SET OUT1 OUT2 VCC OUT6 AAT4298 TSOPJW-12 (Top View) N/C GND OUT5 OUT4 OUT3 N/C 1 12 2 11 3 10 4 9 5 8 6 7 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 N/C EN/SET OUT1 OUT2 VCC OUT6 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Absolute Maximum Ratings1 Symbol VCC to GND OUTx to GND EN/SET TJ Description Input to GND Output (Source) to GND EN/SET to GND Operating Junction Temperature Range Value Units -0.3 to 6.0 -0.3 to VIN + 0.3 -0.3 to 6.0 -40 to +150 V V V °C Value Units Thermal Information Symbol θJA PD Description Thermal Resistance2 Maximum Power Dissipation3 SC70JW-8, SC70JW-10 TSOPJW-12 SC70JW-8, SC70JW-10 TSOPJW-12 225 °C/W 160 440 mW 625 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 3. Derate 4.4mW/°C above 25°C. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 3 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Electrical Characteristics1 VCC = 5.0V; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol VCC IQ Description Supply Voltage Range Quiescent Current On Resistance P-Channel RDS(ON) On Resistance N-Channel TCRDS TON TOFF EN/SET VEN(L) VEN(H) TEN/SET LO TEN/SET_HI_MIN TEN/SET_HI_MAX TOFF TLAT IEN/SET Conditions On Resistance Temperature Coefficient Output Turn-On Time2 Output Turn-Off Time3 Enable Threshold Low Enable Threshold High EN/SET Low Time Minimum EN/SET High Time Maximum EN/SET High Time EN/SET Off Timeout EN/SET Latch Timeout EN/SET Input Leakage Min Typ Max Units 5.5 10 1.0 6.0 7.0 6.0 7.0 V 1.8 EN/SET = VCC = 5V, IOUT = 0, All Switches ON EN/SET = GND, VCC = 5V, OUTx = Open VCC = 5V VCC = 3.6V VCC = 5V VCC = 3.6V 3.0 2.5 3.0 1.9 2.0 2800 VCC = 5V, COUT = 100nF; TA = 25°C VCC = 5V, COUT = 100nF; TA = 25°C VIN = 1.8V VIN = 5.5V ppm/°C 1.6 0.8 1.4 0.5 2.7 2.1 μs μs 0.4 V V μs ns μs μs μs μA 75 50 -1 μA 75 500 500 1 1. The AAT4296/98 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 2. TON is the time after latch timeout to 90% of the output voltage. See Figure 1. 3. TOFF is the time after off timeout to 10% of the output voltage. See Figure 1. 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1μF, COUTx = 0.1μF, TA = 25°C. Quiescent Current vs. Input Voltage Quiescent Current vs. Temperature 3.5 Quiescent Current (µA) Quiescent Current (µ µA) 3.5 3.0 85°C 2.5 2.0 1.5 1.0 -40°C 25°C 0.5 0.0 1.5 2 2.5 3 3.5 4 4.5 5 3.0 VCC = 5.0V 2.5 2.0 1.5 VCC = 3.6V 1.0 0.5 -40 5.5 -20 0 40 60 80 100 Temperature (°°C) Input Voltage (V) VIH vs. Input Voltage VIL vs. Input Voltage 1.2 1.0 1.1 0.9 -40°C 1.0 -40°C 0.8 VIL (V) VIH (V) 20 0.9 85°C 0.8 0.7 85°C 0.6 25°C 25°C 0.7 0.5 0.6 0.4 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 2.0 2.5 Input Voltage (V) 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) P-Channel RDS(ON) vs. Input Voltage P-Channel RDS(ON) vs. Temperature (ILOAD = 100mA) (ILOAD = 100mA) 3.3 25 3.1 RDS(ON) (Ω) RDS(ON) (Ω Ω) 20 15 RDS2 10 RDS3 5 0 RDS1 2.5 3.0 RDS3 2.5 2.3 RDS1 RDS2 RDS4 RDS5 1.9 RDS5 RDS4 2.0 RDS6 2.7 2.1 RDS6 1.5 2.9 3.5 4.0 Input Voltage (V) 4.5 5.0 5.5 1.7 -40 -20 0 20 40 60 80 100 Temperature (°°C) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 5 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1μF, COUTx = 0.1μF, TA = 25°C. N-Channel RDS(ON) vs. Input Voltage N-Channel RDS(ON) vs. Temperature (ILOAD = 100mA) (ILOAD = 100mA) 4.0 2.9 2.6 RDS6 3.0 RDS3 RDS4 RDS(ON) (Ω) RDS(ON) (Ω Ω) 3.5 2.5 2.0 RDS2 2.0 2.5 3.0 3.5 4.0 4.5 5.0 RDS5 -40 -20 0 20 40 60 80 Input Voltage (V) Temperature (°°C) P-Channel RDS(ON) vs. Temperature N-Channel RDS(ON) vs. Temperature (VCC = 3.6V; ILOAD = 100mA) (VCC = 3.6V; ILOAD = 100mA) 100 3.5 3.4 RDS3 3.1 RDS6 3.0 RDS5 RDS1 2.8 RDS(ON) (Ω) 3.7 RDS4 2.5 2.0 1.5 0.0 -20 0 20 RDS5 RDS1 RDS2 0.5 2.2 -40 RDS4 RDS3 RDS6 1.0 RDS2 2.5 40 60 80 100 -40 -20 0 Temperature (°°C) 20 40 60 80 100 Temperature (°°C) μ 350 300 350 300 VCC = 5.0V 250 VCC = 5.0V 250 200 200 VCC = 3.3V 150 100 VCC = 3.3V 150 100 VCC = 1.8V 50 VCC = 1.8V 50 -40 -20 0 20 40 60 ° 6 RDS1 RDS2 0.8 5.5 4.0 RDS(ON) (Ω) 1.7 1.1 RDS1 1.0 1.5 2.0 1.4 RDS5 1.5 RDS4 RDS3 RDS6 2.3 80 100 -40 -20 0 20 40 60 ° Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 80 100 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1μF, COUTx = 0.1μF, TA = 25°C. EN/SET Timeout vs. Input Voltage 290 Turn-On and Turn-Off Time vs. Temperature 2.0 TLATCH 260 Time (μs) Timeout (μs) 1.6 230 TOFF 200 170 140 TON (Rise Time) 1.2 0.8 TOFF (Fall Time) 0.4 110 0.0 -40 80 1.5 2 2.5 3 3.5 4 4.5 5 -20 5.5 Turn-On Characteristic VOUT1 (5V/div) 5V VOUT1 (5V/div) 0V 5V VOUT2 (5V/div) VOUT2 (5V/div) 0V Turn-On Characteristic 0V 5V 0V 5V 0V Turn-On Characteristic VOUT1 (5V/div) VOUT2 (5V/div) (RLOAD1 = RLOAD2 = 100Ω Ω; COUT1 = COUT2 = 0.1μF) EN/SET (5V/div) 0V 5V VOUT1 (5V/div) 0V 5V VOUT2 (5V/div) 0V Time (50μs/div) 100 Time (50μs/div) (RLOAD1 = RLOAD2 = 100Ω Ω; COUT1 = COUT2 = 0.1μF) 5V 80 5V Time (50μs/div) EN/SET (5V/div) 60 (RLOAD1 = RLOAD2 = 100Ω Ω; COUT1 = COUT2 = 0.1μF) EN/SET (5V/div) 0V 40 Turn-On Characteristic (RLOAD1 = RLOAD2 = 100Ω Ω; COUT1 = COUT2 = 0.1μF) 5V 20 Temperature (°°C) Input Voltage (V) EN/SET (5V/div) 0 5V 0V 5V 0V 5V 0V Time (50μs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 7 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1μF, COUTx = 0.1μF, TA = 25°C. Turn-Off Characteristic (RLOAD1 = RLOAD2 = 100Ω Ω; COUT1 = COUT2 = 0.1μF) EN/SET (5V/div) VOUT1 (5V/div) VOUT2 (5V/div) Ω 5V 5V 0V 0V 5V 5V 0V 0V 5V 5V 0V 0V Time (50μs/div) Ω 5V 0V 5V 0V 5V 8 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Functional Block Diagram VCC AAT4298 OUT1 OUT2 EN/SET S2Cwire Serial Interface OUT3 OUT4 OUT5 OUT6 GND Functional Description The AAT4296/98 is comprised of five/six push/pull output slew rate limited load switches primarily targeted for microcontroller general purpose input/output (I/O) expansion applications. Each push/pull output is supplied by the common VCC input and is controlled via the digital EN/SET input pin. When a given output is enabled, the voltage source applied to the VCC pin is then switched to the respective output. The high-side P-channel MOSFET transistor has a typical on resistance (RDS(ON)) of 3 when operating from a 3.6V supply. When a respective output is disabled or turned off, the given output pin is then connected to ground through a low side N-channel MOSFET with a typical on resistance (RDS(ON)) of 2. This circuit architecture affects a simple logic control with the high level based on the applied VCC. For the AAT4296, this creates a 1-to-5 I/O expander, and for the AAT4298 this creates a 1-to-6 I/O expander. Both the AAT4296 and AAT4298 have been designed to operate with an input voltage range of 1.8V to 5.5V, making them ideal for battery-powered applications. These devices may also be used for load switching applications, as well as I/O expansion. Since the VCC is gated to each output through a slew rate limited low on-resistance switch, they are ideal for controlling applications circuits with light load current requirements. Such applications could include simple LED function indicator lamps, RGB LED fashion lighting, audio and RF circuits, or any other system with a power requirement that does not exceed the thermal dissipation limits of the load switch and device package. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 9 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Each device push/pull output may be represented by the following circuit and simplified equivalent model (Figures 1 and 2): VCC Control OUT Figure 1: Push/Pull Output Circuit. The ON/OFF state of the output is controlled by the EN/ SET serial data input. An internal control counter is clocked on the rising edge of the EN/SET pin and is decoded into the 32/64 possible states (see Table 1). 3Ω OUT 2Ω Figure 2: Simplified Equivalent Model. The state of each output is controlled via the EN/SET pin using Skyworks' S2Cwire interface. To enable a respective switch, a series of clocked pulses should be applied to the EN/SET pin. The number of pulses clocked will determine the switch configuration based on the truth table shown in Table 1. At the end of the serial pulse data set, the EN/SET set pin should be held high to then latch the clocked data and enable the desired switch configu- 10 The AAT4296/98 offers two different options when the switches are in the off state. For applications with an active pull down or auto-discharge requirement, the internal N-channel switch will connect the output node to ground with a series resistance of 2. S2Cwire Serial Interface VCC Control ration. When the device is enabled with the EN/SET held to a logic high state, the device quiescent current consumption will typically increase to 3μA and normal ambient room temperatures. If output sequencing of the switches is not necessary, all of the outputs will be switched on simultaneously on the first rising edge of the EN/SET pin by simply pulling the EN/SET to a logic high level. The default switch position for one clock pulse is all switches “on.” However, if output sequencing is desired, a series of pulses on the EN/SET pin will set the outputs to the desired state (refer to Table 1 for output settings). The S2Cwire interface relies on the number of rising edges of the EN/SET pin to address and load the registers. S2Cwire latches data or address after the EN/SET pin has been held high for time TLAT. The interface records rising edges of the EN/SET pin and decodes them into 32 (for AAT4296) or 64 (for AAT4298) different states, as indicated in Table 1. There are 32 (for AAT4296)/ 64 (for AAT4298) different sequences for controlling individual turn-on/turn-off of each switch. The counter can be clocked at speeds up to 1MHz, such that intermediate states are not visible. Alternatively, the EN/SET clock pulses may be entered one at a time for desired setting. The first rising edge of EN/SET enables the IC and turns all the switches ON. Once the final clock cycle is received, the EN/SET pin is held high to maintain the device setting. The device is disabled 500μs (TOFF) after the EN/SET pin transitions to a logic low state. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander AAT4298 AAT4298 AAT4296 (only) Clock OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 Clock OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on on off off off off off off off off off off off off off off off off on on on on on on on on off off off off off off off off on on on on on on on on off off off off off off off off on on on on off off off off on on on on off off off off on on on on off off off off on on on on off off off off on on off off on on off off on on off off on on off off on on off off on on off off on on off off on on off off on off on off on off on off on off on off on off on off on off on off on off on off on off on off on off on off 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off off on on on on on on on on on on on on on on on on off off off off off off off off off off off off off off off off on on on on on on on on off off off off off off off off on on on on on on on on off off off off off off off off on on on on off off off off on on on on off off off off on on on on off off off off on on on on off off off off on on off off on on off off on on off off on on off off on on off off on on off off on on off off on on off off on off on off on off on off on off on off on off on off on off on off on off on off on off on off on off on off Table 1: Output Settings. OUTn TH TL TLAT TON TO TOFF EN/SET Figure 3: Timing Diagram. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 11 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Applications Information The AAT4296 and AAT4298 have been designed so that no external parts are required for the device to function as a general purpose I/O expander. Such external parts could include bypass capacitors, or pull-up or pull-down resistors. For applications which may use some or all of the output to switch light load current levels to application circuits, good engineering practice would dictate the use of small bypass capacitors place on the VCC input and each output which is being used to conduct current to a load. The use of small ceramic capacitors between the input and output nodes to ground will aid in reducing line and load transient response effects. Refer to the application schematic of Figure 4 for an example for placing bypass capacitors. The output capacitor has no specific capacitor type or ESR requirement. If desired, COUT may be increased to a value greater than 0.1μF without limit to accommodate any load transient condition without adversely affecting the device turn-on slew rate time. Thermal Considerations The AAT4296 and AAT4298 are designed to deliver continuous output load currents. The limiting characteristic for maximum safe operating output load current is package power dissipation. In order to obtain high operating currents, careful device layout and circuit operating conditions need to be taken into account. At any given ambient temperature (TA), the maximum package power dissipation can be determined by the following equation: Input Capacitor Typically a 0.1μF to 1μF capacitor is recommended for CIN in most applications. A CIN capacitor is not required for basic operation; however, CIN is useful in preventing load transient effects from affecting upstream circuits when internal switches are enabled to their respective output load circuits. CIN should be located as close to the device VIN pin as practically possible. There is no specific capacitor equivalent series resistance (ESR) requirement for CIN; however, for higher current operation, ceramic capacitors are recommended for CIN due to their inherent capability over tantalum or aluminum electrolytic capacitors to withstand input current surges from low impedance sources, such as batteries in portable devices. Output Capacitor For typical applications where the AAT4696/98 is used for I/O expansion, no output capacitors are required. Many other common applications such as controlling LED indicator lamps in portable products do not require an output capacitor because the end load is not sensitive to device turn-on transient effects. For improved load transient response in systems using the AAT4296/98 for load switching, the addition of a small output capacitor placed between the output pins and ground can have a beneficial effect. A 0.1μF ceramic capacitor is suggested as a reasonable value for an output capacitor. Please refer to Figure 4. 12 PD(MAX) = TJ(MAX) - TA θJA Constants for the AAT4296 and AAT4298 are maximum junction temperature, TJ(MAX) = 125°C, and package thermal resistance, JA = 120°C/W. Worst-case conditions are calculated at the maximum operating temperature, where TA = 85°C. Typical conditions are calculated under normal ambient conditions, where TA = 25°C. At 25°C ambient, the AAT4296 is capable of dissipating 440mW of power. If all five channels have 5.0V output, the average current is 121mA per channel. The AAT4298 is capable of dissipating 625mW of power. If all six channels have 5.0V output, the average current is 131.5mA per channel. At 85°C ambient, the AAT4296 is capable of dissipating 177.78mW of power. If all five channels have 5.0V output, the average current is 76.5mA per channel. The AAT4298 is capable of dissipating 250mW of power. If all six channels have 5.0V output, the average current is 83mA per channel. Driving LED Loads The AAT4296 and AAT4298 can be used to drive LEDs or other applications with light load current requirements. LED applications may include main and sub-LCD display backlighting, camera photo-flash applications, color (RGB) LEDs, and infrared (IR) diodes for remotes. In series with LEDs, ballast resistors must be used to limit Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Where: the LED current. The LED current will vary with supply voltage and LED forward voltage. Most types of LEDs have forward voltage specifications ranging from 2.0V to 5.0V. Calculate the necessary ballast resistor value from the following formula: RLED = RLED is the resistance of resistor to be placed in series with the LED (). VIN is the input supply voltage to the device (V). VF is the forward voltage of the LED (V). RDS(ON) is the resistance of the switch when it is turned on (). ILED is the desired operating current of the LED (A). (VIN - VF) - RDS(ON) ILED Applications Circuit VCC Input VCC OUT1 OUT 1 OUT2 OUT 2 AAT4298 EN/SET Input EN/SET OUT3 OUT 3 OUT4 OUT 4 OUT5 OUT 5 OUT6 OUT 6 GND C1* C2* C3* C4* C5* C6* Figure 4: Typical Application Diagram. 5V AAT4296 EN Bluetooth Device OUT1 IN OUT2 EN OUT3 OUT4 A series of pulses Infrared Device OUT5 EN/SET Backlighting OUT6 GND R G B Figure 5: Infrared, Bluetooth, RGB, and Backlighting Control. * Use of capacitors on each output is optional. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 13 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander AAT4298 Low Dropout Voltage Regulator OUT1 IN VIN Application Circuit OUT2 Application Circuit Drawing a Load From the AAT4298 GPIO Expander OUT3 OUT4 GPIO 1 EN/SET OUT5 I/O Control Enable OUT6 I/O Control System μController Enable I/O Control GPIO 2 GPIO 3 GPIO 4 GPIO 5 GPIO 2 to GPIO 6 are now free for other uses GPIO 6 GPIO Controlled Application Circuits Enable I/O Control Enable Figure 6: GPIO I/O Expander (Condense Five GPIO Control Lines to One Using AAT4296). Evaluation Board Description AAT4296 Evaluation Board The AAT4296 evaluation board demonstrates the AAT4296 SmartSwitch™ as a microprocessor I/O expand- Button(s) Pushed1 SW1 SW2 SW3 SW1 + SW2 SW2 + SW3 SW1 + SW3 SW1 + SW2 + SW3 er. This chaper describes the evaluation board and its accompanying user interface. A schematic of the complete circuit is shown in Figure 7, and the actual board layout is given in Figures 8 and 9. Table 2 shows the user interface functionality. Table 3 provides the the component list for the AAT4296 evaluation board. Description [Push/Release once] Toggle On/Off of Output Channel 1. [Push/Release once] Toggle On/Off of Output Channel 2. [Push/Release once] Toggle On/Off of Output Channel 3. [Push/Release together] Toggle On/Off of Output Channel 4. [Push/Release together] Toggle On/Off of Output Channel 5. [Push/Release together] Auto Cycling. All Outputs blinks (On/Off) five times and goes into Binary-Increment mode. [Push/Release together] Reset: All Outputs go off Table 2: AAT4296 User Interface Functionality. 1. The '+' sign indicates that these buttons are all pressed and released together. 14 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander DC- DC+ TP TP J1 1 2 3 U1 1 2 3 4 JP1 IN OUT2 OUT1 EN/SET OUT3 OUT4 OUT5 GND 8 7 6 5 AAT4296 TP TP TP R6 330 Out5 R8 R9 R10 330 C5 0.1μF C6 330 0.1μF C7 330 0.1μF Out4 Out3 Out2 Out1 2 C8 0.1μF Green GND J2 1 R7 C4 330 0.1μF 3 R4 100K GND DC+ C1 1μF R5 330 U2 0 2 4 0 2 4 0 2 4 SW3 R3 1K R2 1K R1 1K 1 3 5 1 2 3 4 VDD GP5 GP4 GP3 VSS GP0 GP1 GP2 8 7 6 5 LED1 RED GND PIC12F675 GND SW2 1 3 5 SW1 1 3 5 GND Figure 7: AAT4296 Evaluation Board Schematic. Figure 8: AAT4296 Evaluation Board Top Layer (not to scale). Figure 9: AAT4296 Evaluation Board Bottom Layer (not to scale). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 15 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Component Part# U1 AAT4296IJS U2 PIC12F675 SW1 – SW3 R1 – R3 R4 R5 R6-R10 JP1 C1 C4-C8 (optional) J1, J2 LED1 OUT1-OUT5 PTS645TL50 Chip Resistor Chip Resistor Chip Resistor Chip Resistor Chip Resistor ECJ-2YB1A105K GRM188R71C104KA01D PRPN401PAEN CMD15-21SRC/TR8 CMD15-21UGC/TR8 Description Manufacturer Five-Channel Push/Pull I/O Expander; SC70JW-8 package 8-bit CMOS, FLASH-based μC; 8-pin PDIP package Switch Tact, SPST, 5mm 1K, 5%, 1/4W; 1206 100K, 5%, 1/4W; 0805 330, 5%, 1/4W; 1206 330, 5%, 1/4W; 0603 0Ω, 5%; 0805 1μF, 10V, X5R, 10%; 0805 0.1μF, 16V, 10%; 0603 Con. Header, 2mm zip Red LED; 1206 Green LED; 1206 Skyworks Microchip ITT Industries Vishay Vishay Vishay Vishay Vishay Panasonic-ECG Murata Sullins Electronics Chicago Miniature Lamp Chicago Miniature Lamp Table 3: AAT4296 Evaluation Board Component Listing. AAT4298 Evaluation Board The AAT4298 evaluation board demonstrates the AAT4298 SmartSwitch™ with a microprocessor I/O expander application. This application shows how a microcontroller can free up five I/O ports by connecting one I/O port to the AAT4298's EN/SET pin. Button(s) Pushed1 SW1 SW2 SW3 SW4 SW1 + SW2 SW3 + SW4 SW5 A schematic of the complete circuit is shown in Figure 10, and the actual board layout is given in Figures 11 and 12. Table 4 shows the user interface functionality. Table 5 provides the the component list for the AAT4298 evaluation board. Description [Push/Release once] Toggle On/Off of Output Channel 1. [Push/Release once] Toggle On/Off of Output Channel 2. [Push/Release once] Toggle On/Off of Output Channel 3. [Push/Release once] Toggle On/Off of Output Channel 4. [Push/Release together] Toggle On/Off of Output Channel 5. [Push/Release together] Toggle On/Off of Output Channel 6. [Push/Release once] Reset: All Outputs go off [Hold ~ 1.5 second] Auto Cycling. All Outputs blinks (On/Off) five times and device begins binary increment mode. Table 4: AAT4298 User Interface Functionality. 1. The '+' sign indicates that these buttons are all pressed and released together. 16 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander DC+ R13 R12 1K 1K 02 4 1 3 5 02 4 1 3 5 02 4 1 3 5 02 4 1 3 5 02 4 1 3 5 R8 330 C8 1μF R11 R10 R9 1K 1K 1K U2 1 2 3 4 SW5 SW4 VDD GP5 GP4 GP3 VSS GP0 GP1 GP2 8 7 6 5 LED1 RED R7 100K PIC12F675 SW3 SW2 SW1 3 2 1 J2 U1 1 N/C 2 GND 3 OUT5 4 OUT4 5 OUT3 6 N/C DC- N/C EN/SET OUT1 OUT2 VIN OUT6 DC+ 12 11 10 9 8 7 3 JP1 C7 1μF AAT4298 TP R6 330 D6 TP R5 330 C6 0.1μF D5 TP R4 330 C5 0.1μF D4 TP R3 330 C4 0.1μF D3 TP R2 330 C3 0.1μF D2 2 1 J1 TP R1 330 C2 0.1μF D1 C1 0.1μF Figure 10: AAT4298 Evaluation Board Schematic. Figure 11: AAT4298 Evaluation Board Top Layer (not to scale). Figure 12: AAT4298 Evaluation Board Bottom Layer (not to scale). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 17 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Component Part# U1 AAT4298ITP U2 PIC12F675 SW1 – SW5 R1 – R6, R8 R7 R9 – R13 JP1 C1 – C6 (optional) C7 C8 J1, J2 LED1 OUT1-OUT6 PTS645TL50 Chip Resistor Chip Resistor Chip Resistor Chip Resistor GRM188R71C104KA01D GRM188R61A105KA61B GRM21BR71C105KA01B PRPN401PAEN CMD15-21SRC/TR8 CMD15-21UGC/TR8 Description Six-Channel Push/Pull I/O expander; TSOPJW-12 Package 8-bit CMOS, FLASH-based μC; 8-pin PDIP package Switch Tact, SPST, 5mm 330Ω, 5%, 1/4W; 0603 100kΩ, 5%, 1/4W; 0603 1kΩ, 5%, 1/4W; 0603 0Ω, 5%; 0805 0.1μF, 16V, 10%; 0603 1μF, 10V, X5R, 10%; 0603 1μF, 16V, X7R, 10%; 0805 Con. Header, 2mm zip Red LED; 1206 Green LED; 1206 Manufacturer Skyworks Microchip ITT Industries Vishay Vishay Vishay Vishay Murata Murata Murata Sullins Electronics Chicago Miniature Lamp Chicago Miniature Lamp Table 5: AAT4298 Evaluation Board Component Listing. 18 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Ordering Information Package Marking1 Part Number (Tape and Reel)2 SC70JW-8 SC70JW-10 TSOPJW-12 QIXYY AAT4296IJS-T1 AAT4298IJQ-T1 AAT4298ITP-T1 QEXYY Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Package Information SC70JW-8 2.20 ± 0.20 1.75 ± 0.10 0.50 BSC 0.50 BSC 0.50 BSC 0.225 ± 0.075 2.00 ± 0.20 0.100 7° ± 3° 0.45 ± 0.10 4° ± 4° 0.05 ± 0.05 0.15 ± 0.05 1.10 MAX 0.85 ± 0.15 0.048REF 2.10 ± 0.30 All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 19 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander SC70JW-10 2.20 ± 0.20 1.75 ± 0.10 0.40 BSC 0.225 ± 0.075 Top View 0.45 ± 0.10 0.100 7° ± 3° 4° ± 4° 0.05 ± 0.05 0.15 ± 0.05 1.10 MAX 0.85 ± 0.15 2.00 ± 0.20 2.10 ± 0.30 Side View End View TSOPJW-12 2.85 ± 0.20 2.40 ± 0.10 0.20 + 0.10 - 0.05 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 7° NOM 0.04 REF 0.055 ± 0.045 0.15 ± 0.05 + 0.10 1.00 - 0.065 0.9625 ± 0.0375 3.00 ± 0.10 4° ± 4° 0.45 ± 0.15 0.010 2.75 ± 0.25 All dimensions in millimeters. 20 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 DATA SHEET AAT4296/4298 Five/Six-Channel Push/Pull I/O Expander Copyright © 2012, 2013 Skyworks Solutions, Inc. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202224B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 4, 2013 21