19-3897; Rev 1; 2/06 Microcontroller Clock Generator with Watchdog Features The MAX7389/MAX7390 replace ceramic resonators, crystals, and supervisory functions for microcontrollers in 3.3V and 5V applications. The MAX7389/MAX7390 provide a clock source, reset, and watchdog functions. The watchdog timer is pin programmable and provides watchdog timeout values in the 16ms to 2048ms range. The MAX7389 provides a separate watchdog output that is used as a status indicator or to control safety-critical system elements. The MAX7390 features a clock-speed select that reduces the output frequency by half. This functionality allows the microcontroller to operate at reduced power and may be used to extend the time available to perform housekeeping tasks, such as writing data to flash during a power failure. The MAX7389/MAX7390 clock outputs are factory programmed to a frequency in the 1MHz to 16MHz range. Four standard frequencies are available. Other frequencies are available upon request. The maximum operating supply current is 5.5mA with a clock frequency of 12MHz. Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7389/MAX7390 are resistant to EMI and vibration, and operate reliably at high temperatures. The high-output drive current and absence of high-impedance nodes make the oscillator invulnerable to dirty or humid operating conditions. ♦ Robust Microcontroller Clock and Supervisor in a Single Package µMAX® Note: “s” is a placeholder for the reset output type. Insert the symbol found in Table 3 in the place of “s.” “r” is a placeholder for the power-on reset (POR) voltage. Insert the symbol found in Table 2 in the place of “r.” “ff” is a placeholder for the nominal output frequency. Insert the symbol found in Table 4 in the place of “ff.” For example, MAX7389CMTP describes a device with 4.38V reset level, open-collector RST output, and a clock output frequency of 8MHz. The MAX7389/MAX7390 are available in an 8-pin package. The MAX7389/MAX7390 standard operating temperature range is from -40°C to +125°C. Applications White Goods Handheld Products Automotive Portable Equipment Appliances and Controls Microcontroller Systems ♦ ♦ ♦ ♦ ♦ Integrated Reset and Watchdog Functions Pin-Programmable Watchdog Timeout Speed Select +2.7V to +5.5V Operation Factory-Trimmed Oscillator ♦ ♦ ♦ ♦ ♦ Reset Valid Down to 1.1V Supply Voltage ±10mA Clock-Output Drive Current ±4% Total Accuracy for -40°C to +125°C ±2.75% Total Accuracy for 0°C to +85°C 5.5mA Operating Current (12MHz Version) ♦ -40°C to +125°C Temperature Range ♦ 8-Pin µMAX Surface-Mount Package ♦ 1MHz to 16MHz Factory Preset Frequency Ordering Information TEMP RANGE PINPACKAGE MAX7389srff -40oC to +125oC 8 µMAX U8-1 MAX7390srff -40oC to +125oC 8 µMAX U8-1 PART PKG CODE Typical Application Circuit, Functional Diagram, and Selector Guide appear at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations TOP VIEW TOP VIEW VCC 1 WDS1 2 8 CLOCK 7 RST/RST MAX7389 6 WDI GND 4 5 WDO µMAX 1 8 CLOCK WDS1 2 7 RST/RST 3 6 WDI GND 4 5 SPEED MAX7390 3 WDS2 VCC WDS2 µMAX ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX7389/MAX7390 General Description MAX7389/MAX7390 Microcontroller Clock Generator with Watchdog ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +6.0V All Other Pins to GND ................................-0.3V to (VCC + 0.3V) CLOCK, RST/RST, WDO Output Current .........................±50mA Continuous Power Dissipation (TA = +70°C) 8-Pin µMAX (derate 4.5mW/°C over +70°C) ................362mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (Typical Application Circuit, VCC = +2.7V to +5.5V, TA = -40°C to +125°C, 1MHz to 16MHz output frequency range, typical values at VCC = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V POWER REQUIREMENTS Operating Supply Voltage Valid RST/RST Supply Voltage Operating Supply Current VCC VCCR ICC 2.7 TA = 0°C to +85°C 1.1 TA = -40°C to +125°C 1.18 fCLOCK = 12MHz 5.5 fCLOCK = 8MHz 4.5 V mA TRI-LEVEL ANALOG INPUTS: WDS1, WDS2 Input-High Voltage Level VCC - 0.55V Input-Middle Voltage Level 0.9 V VCC - 1.1V Input-Low Voltage Level V 0.45 V 0.5 µA LOGIC INPUT: WDI Input Leakage Current ILEAK Logic-Input High Voltage VIH Logic-Input Low Voltage VIL Input high 0.7 x VCC V 0.3 x VCC V PUSH-PULL LOGIC OUTPUTS: RST/RST Output High VOH ISOURCE = 1mA Output Low VOL ISINK = 3mA VCC - 1.5 V 0.05 0.4 V 0.05 0.4 V OPEN-DRAIN LOGIC OUTPUTS: RST, PFO, WDO Output Low VOLO ISINK = 3mA Output High Voltage VOHC ISOURCE = 5mA Output Low Voltage VOLC ISINK = 5mA OUTPUT: CLOCK CLOCK Accuracy fCLOCK TA = 0°C to +85°C, VCC = 5.0V TA = -40°C to +125°C, VCC = 5.0V VCC - 0.3 V 0.3 -2.75 +2.75 -4 +4 V % Clock Frequency Temperature Coefficient VCC = 5.0V (Note 2) 140 400 ppm/°C Clock Frequency Supply Voltage Coefficient TA = +25°C (Note 2) 0.67 1 %/V 2 _______________________________________________________________________________________ Microcontroller Clock Generator with Watchdog (Typical Application Circuit, VCC = +2.7V to +5.5V, TA = -40°C to +125°C, 1MHz to 16MHz output frequency range, typical values at VCC = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CLOCK Duty Cycle CONDITIONS (Note 2) Output Rise Time tR Observation for 20s using a 500MHz oscilloscope CLOAD = 10pF, 10% to 90% of full scale (Note 2) Output Fall Time tF CLOAD = 10pF, 90% to 10% of full scale (Note 2) CLOCK Output Jitter MIN TYP MAX UNITS 45 50 55 % ps 310 RMS 2.5 7.0 ns 2.8 7.5 ns INTERNAL POWER-ON RESET VTH+ VTH - 1.5% VTH + 1.5% TA = -40°C to +125°C VTH - 2.5% VTH + 2.5% V 250 µs VCC rising, Table 2 Reset Voltage Reset Timeout Period TA = +25°C VTH- VCC falling tRST Figures 1, 2 0.98 x VTH+ 86 135 WATCHDOG Watchdog Timeout Period (Figure 2) tWDG WDS1 = GND, WDS2 = GND 11 16 22 WDS1 = open, WDS2 = GND 22 32 44 WDS1 = VCC, WDS2 = GND 44 64 88 WDS1 = GND, WDS2 = open 88 128 177 WDS1 = open, WDS2 = open 177 256 354 WDS1 = VCC, WDS2 = open 354 512 708 WDS1 = GND, WDS2 = VCC 708 1024 1416 WDS1 = open, WDS2 = VCC 1416 2048 2832 ms WDS1 = WDS2 = VCC (watchdog disabled) POWER FAIL Power-Fail Select Threshold VCC Monitoring Threshold (Internal Threshold) Internal Threshold Hysteresis PFI Monitoring Threshold (External Threshold) External Threshold Hysteresis 0.65 x VCC 0.85 x VCC V 4.38 4.60 V 1.0 2 4.0 %VITH PFI rising 0.9 1.1 1.4 V PFI falling 1.0 3.5 8.0 %VETH VSEL PFI input VITH VCC rising 4.06 VIHYST VCC falling VETH VEHYST Note 1: All parameters are tested at TA = +25°C. Specifications over temperature are guaranteed by design. Note 2: Guaranteed by design. Not production tested. _______________________________________________________________________________________ 3 MAX7389/MAX7390 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (Typical Application Circuit, VCC = +5V, fCLOCK = 16MHz, TA = +25°C, unless otherwise noted.) FREQUENCY vs. TEMPERATURE 1.000 0.990 51 1.020 DUTY CYCLE (%) 1.010 1.010 1.000 0.980 49 NORMALIZED TO TA = +25°C 0.980 3.55 4.20 5.50 4.85 50 0.990 NORMALIZED TO VCC = +5V VTH+ = +2.9V 2.90 DUTY CYCLE vs. SUPPLY VOLTAGE 52 MAX7389 toc02 MAX7389 toc01 1.030 NORMALIZED FREQUENCY NORMALIZED FREQUENCY 1.040 MAX7389 toc03 FREQUENCY vs. SUPPLY VOLTAGE 1.020 VTH+ = +2.9V 48 -40 -25 -10 5 20 35 50 65 80 95 110 125 2.90 3.55 4.20 5.50 4.85 VCC (V) TEMPERATURE (°C) VCC (V) DUTY CYCLE vs. TEMPERATURE CLOCK OUTPUT WAVEFORM WITH CL = 10pF CLOCK OUTPUT WAVEFORM WITH CL = 50pF MAX7389 toc05 MAX7389 toc04 52 MAX7389 toc06 VCC = +3.3V VCC = +3.3V 51 DUTY CYCLE (%) CLOCK 1V/div 50 CLOCK 1V/div 49 48 40ns/div -40 -25 -10 5 20 35 50 65 80 95 110 125 40ns/div TEMPERATURE (°C) SUPPLY CURRENT vs. TEMPERATURE 4 CLOCK 1V/div SUPPLY CURRENT vs. SUPPLY VOLTAGE 5 MAX7389 toc08 5 VCC = +5V 4 3 VCC = +3.3V ICC (mA) MAX7389 toc07 MAX7389 toc09 CLOCK OUTPUT WAVEFORM WITH CL = 100pF ICC (mA) MAX7389/MAX7390 Microcontroller Clock Generator with Watchdog 3 2 2 1 1 VTH+ = +2.9V 40ns/div -40 -25 -10 5 20 35 50 65 80 95 110 125 2.90 3.55 TEMPERATURE (°C) 4 _______________________________________________________________________________________ 4.20 VCC (V) 4.85 5.50 Microcontroller Clock Generator with Watchdog CLOCK SETTLING TIME FROM START POWER-ON RESET BEHAVIOR MAX7389 toc10 MAX7389/90 toc11 VCC 2V/div VCC 2V/div CLOCK 5V/div CLOCK 2V/div RST 5V/div tRST 1µs/div 100µs/div MAXIMUM VCC TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE RESPONSE OF RST AND WDO WDI EXCEEDING tWDG MAX7389/90 toc13 TRANSIENT DURATION (µs) MAX7389 toc12 1000 WDI 2V/div RESET OCCURS ABOVE THIS CURVE 100 WDO 5V/div tWDG RST 5V/div 10 tRST VCC FALLING FROM VTH+ + 100mV 1 100 200 300 400 500 600 700 800 900 1000 2ms/div RESET THRESHOLD OVERDRIVE (mV) RISING THRESHOLD vs. TEMPERATURE MAX7389 toc14 2.88 VTH+ (V) CLOCK RESPONSE TO SPEED SELECT INPUT MAX7389/90 toc15 2.90 SPEED 2V/div 2.86 2.84 CLOCK 2V/div 2.82 2.80 -40 -25 -10 5 20 35 50 65 80 95 110 125 200ns/div TEMPERATURE (°C) _______________________________________________________________________________________ 5 MAX7389/MAX7390 Typical Operating Characteristics (continued) (Typical Application Circuit, VCC = +5V, fCLOCK = 16MHz, TA = +25°C, unless otherwise noted.) Microcontroller Clock Generator with Watchdog MAX7389/MAX7390 Pin Description PIN NAME FUNCTION MAX7389 MAX7390 1 1 VCC 2 2 WDS1 Watchdog Timeout Select Input 1. Connect WDS1 and WDS2 to VCC, GND, or VCC/2, as shown in Table 1, to set the watchdog timeout period. 3 3 WDS2 Watchdog Timeout Select Input 2. Connect WDS2 and WDS1 to VCC, GND, or VCC/2, as shown in Table 1, to set the watchdog timeout period. 4 4 GND Ground 5 ⎯ WDO Watchdog Output. Open-drain watchdog output asserts if WDI is not toggled within the watchdog timeout period. — 5 SPEED 6 6 WDI Power Input. Connect VCC to the power supply. Bypass VCC to GND with a 1µF capacitor. Install the bypass capacitor as close to the device as possible. Clock-Speed Select Input. Connect SPEED high for the factory-trimmed clock output frequency. Connect SPEED low to reduce the clock output frequency by half. Watchdog Input. A rising edge on WDI resets watchdog timer. If WDI does not receive a rising edge within the watchdog timeout period (tWDG), RST/RST asserts. The watchdog timeout period is programmable through WDS1 and WDS2. Connect WDS1 and WDS2 to VCC to disable the watchdog timer. 7 7 Reset Output. Reset output is available in one of three configurations: push-pull RST, pushpull RST, or open-drain RST. The reset output is asserted if one of the following conditions RST/RST occurs: whenever VCC is below the reset threshold level; for devices with WDI, reset output asserts when WDI does not receive a rising edge within the watchdog timeout period. 8 8 CLOCK Clock Output Detailed Description The MAX7389/MAX7390 replace ceramic resonators, crystals, and supervisory functions for microcontrollers in 3.3V and 5V applications. The MAX7389/MAX7390 provide a clock source, reset, and watchdog functions. The watchdog timer is pin programmable and provides watchdog timeout values in the 16ms to 2048ms range. The MAX7389 provides a separate watchdog output that is used as a status indicator or to control safety-critical system elements. The MAX7390 features a clock-speed switch that reduces the output frequency by half. This functionality allows the microcontroller to operate at reduced power and may be used to extend the time available to perform housekeeping tasks, such as writing data to flash during a power failure. The integrated reset and watchdog functions provide the power-supply monitoring functions necessary to ensure correct microcontroller operation. The reset circuit has built-in power-supply transient immunity and provides both power-on reset and power-fail or brownout reset 6 functionality. Two standard factory-trimmed reset levels are available. The watchdog timer is programmable to eight individual timeout values and may be disabled for test purposes. Clock Output (CLOCK) The push-pull clock output (CLOCK) drives a groundconnected 1kΩ load or a positive supply connected 500Ω load to within 300mV of either supply rail. CLOCK remains stable over the full operating voltage range and does not generate short output cycles during either power-on or power-off. A typical startup characteristic is shown in the Typical Operating Characteristics section. The MAX7390 clock output frequency is reduced by a factor of two by taking SPEED low. This functionality allows the microcontroller to operate at reduced power and may be used to extend the time available to perform housekeeping tasks. Reset The reset function drives the microcontroller reset input to prevent operation in the cases of the initial power-on setting, low power-supply voltages, and the failed _______________________________________________________________________________________ Microcontroller Clock Generator with Watchdog Power-On Reset (POR) The internal power-on reset (POR) circuit detects the power-supply voltage (VCC) level at startup. The POR circuit starts the oscillator when VCC exceeds the reset rising threshold level (VTH+). The reset output remains asserted from the time VCC crosses the VTH+ and continues to be asserted for the reset timeout period (tRST). Upon completion of the reset timeout, the reset output is released. See Figure 1. Low-Voltage Lockout The reset output asserts whenever VCC drops below the reset falling threshold, VTH-. The difference between the reset rising and falling threshold values is VTH+ - (VTH-). The nominal hysteresis value is 2% of the reset rising threshold value. The reset detection circuitry provides filtering to prevent triggering on negative voltage spikes. See the Typical Operating Characteristics for a plot of maximum transient duration without causing a reset pulse vs. reset comparator overdrive. Figure 1 shows the reset output (RST/RST) behavior during power-up and brownout. Watchdog The watchdog function provides microprocessor monitoring by requiring the microprocessor to toggle an output pin to indicate correct operation. The WDI input monitors the port signal and resets the watchdog timer on receipt of a rising edge. If an edge is not received within the required watchdog timeout period, the watchdog circuit initiates a reset cycle and asserts the WDO output (MAX7389 only). The internal watchdog circuits are reset and the watchdog timer restarts at the end of the reset cycle (RST/RST output releases). The WDO output remains asserted until a valid edge is received on the WDI input, signifying correct microprocessor operation. The WDO output can be used as a status indicator either to the microprocessor or to an external device, such as a fault-indicating LED or sounder. The 5 VCC (V) 4 VTH+ 3 VTH- 2 1 VCCR CLK tRST RST CLOCK STARTS ON INTERNAL POR (VTH+, VCC RISING). RST RELEASES AFTER THE RESET TIMEOUT PERIOD. RST ASSERTS ON RESET FALLING VOLTAGE (VTH-, VCC FALLING). CLOCK STOPS. RST CONTINUES TO ASSERT UNTIL VCCR. Figure 1. RST/RST Behavior During Power-Up and Brownout _______________________________________________________________________________________ 7 MAX7389/MAX7390 watchdog operations. Three reset output versions are available: push-pull RST, push-pull RST, and open-drain RST. The reset timeout period (tRST) is nominally 135s. MAX7389/MAX7390 Microcontroller Clock Generator with Watchdog WDO output is an open-drain output. The power-up condition of the WDO output is high (not asserted). The operation of the watchdog and reset function is illustrated in Figure 2. The watchdog timeout period is set to one of nine possible values by pin strapping WDS1 and WDS2. Each control input has three possible values assigned by connection to GND, VCC, or VCC/2 (see Table 1). One of the assigned values disables the watchdog function and is intended for customer use during test. The watchdog timer is disabled while the RST/RST output is asserted. Table 1. Watchdog Timeout Periods WDS1 WDS2 GND GND WATCHDOG TIMEOUT PERIOD (ms) MIN TYP MAX 11 16 22 VCC/2 = open GND 22 32 44 VCC GND 44 64 88 GND VCC/2 = open 88 128 177 VCC/2 = open VCC/2 = open 354 177 256 VCC VCC/2 = open 354 512 708 GND VCC 708 1024 1416 VCC/2 = open VCC 1416 2048 2828 VCC VCC Disabled Note: WDS1 or WDS2 is pulled internally to VCC/2 if left floating. Applications Information Interfacing to a Microcontroller Clock Input The CLOCK output is a push-pull, CMOS logic output, which directly drives any microprocessor (µP) or microcontroller (µC) clock input. There are no impedancematching issues when using the MAX7389/MAX7390. Operate the MAX7389/MAX7390 and microcontroller (or other clock input device) from the same supply voltage level. Refer to the microcontroller data sheet for clock-input compatibility with external clock signals. The MAX7389/MAX7390 require no biasing components or load capacitance. When using the MAX7389/ MAX7390 to retrofit a crystal oscillator, remove all biasing components from the oscillator input. Power-Supply Considerations The MAX7389/MAX7390 operate with power-supply voltages in the 2.7V to 5.5V range. Power-supply decoupling is needed to maintain the power-supply rejection performance of the devices. Bypass VCC to GND with a 0.1µF surface-mount ceramic capacitor. Mount the bypass capacitor as close to the device as possible. If possible, mount the MAX7389/MAX7390 close to the microcontroller’s decoupling capacitor so that additional decoupling is not required. A larger-value bypass capacitor is recommended if the MAX7389/MAX7390 are to operate with a large capacitive load. Use a bypass capacitor value of at least 1000 times that of the output load capacitance. VCC CLK RESET TIMEOUT PERIOD (tRST) RST INTERNAL WATCHDOG STATE ACTIVE TRIPPED WDI WDO WATCHDOG TIMEOUT PERIOD (tWDG) Figure 2. Watchdog Timing Diagram 8 _______________________________________________________________________________________ Microcontroller Clock Generator with Watchdog The jitter performance of all clock sources degrades in the presence of mechanical and electrical interference. Table 2. POR Voltage POWER-ON RESET VOLTAGE (VTH) r 4.38 M The MAX7389/MAX7390 are immune to vibration, shock, and EMI influences and thus provide a considerably more robust clock source than crystal- or ceramicresonator-based oscillator circuits. Table 3. Reset Output Type OUTPUT TYPE s Push-pull RST A Push-pull RST B Open drain RST C Note: Standard values are shown in bold. Contact factory for other output types. Table 4. Clock Output Frequency 3.96 J 3.44 N CLOCK FREQUENCY (fCLOCK) (MHz) ff 3.34 P 4 RD 3.13 Q 8 TP 2.89 S 12 VB 2.82 V 16 WB 2.5 X Note: Contact factory for other frequencies. Note: Standard values are shown in bold. Contact factory for other POR voltage. Selector Guide PART RESET WATCHDOG INPUT (WDI)/ FREQUENCY RANGE (MHz) FUNCTION WATCHDOG OUTPUT (WDO) POWER-FAIL INPUT (PFI)/ POWER-FAIL OUTPUT (PFO) SPEED PINPACKAGE MAX7387 1 to 16 Yes Yes/yes Yes/yes — 10 µMAX MAX7388 1 to 16 Yes Yes/no No/yes — 8 µMAX MAX7389 1 to 16 Yes Yes/yes No/no — 8 µMAX MAX7390 1 to 16 Yes Yes/no No/no Yes 8 µMAX MAX7391 1 to 16 Yes No/no Yes/no Yes 8 µMAX Note: Other versions with different features are available. Refer to the MAX7387/MAX7388 and MAX7391 data sheets. _______________________________________________________________________________________ 9 MAX7389/MAX7390 Output Jitter The MAX7389/MAX7390s’ jitter performance is given in the Electrical Characteristics table as a peak-to-peak value obtained by observing the output of the device for 20s with a 500MHz oscilloscope. Jitter measurements are approximately proportional to the period of the output frequency of the device. Thus, a 4MHz part has approximately twice the jitter value of an 8MHz part. Microcontroller Clock Generator with Watchdog MAX7389/MAX7390 Functional Diagram VCC RST/RST MAX7389 MAX7390 PRESCALER POWER-ON RESET RESET TIMER OSCILLATOR CLOCK SPEED** WDO* WATCHDOG TIMER WDI N WDS1 WDS2 *MAX7389 ONLY **MAX7390 ONLY GND Typical Application Circuit 12V DC-DC 5V VCC RST/RST RST/RST WDO* I/O PORT WDI I/O PORT SPEED** I/O PORT VCC WDS1 WDS2 MAX7389 MAX7390 CLOCK *MAX7389 ONLY **MAX7390 ONLY OSC1 GND Chip Information PROCESS: BiCMOS 10 ______________________________________________________________________________________ µC Microcontroller Clock Generator with Watchdog E Ø0.50±0.1 8 INCHES DIM A A1 A2 b H c D e E H 0.6±0.1 1 L 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6° 0° 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0° 6° 0.5250 BSC TOP VIEW A1 A2 e A α c b L SIDE VIEW FRONT VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2006 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. MAX7389/MAX7390 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)