19-3876; Rev 0; 5/06 Precision Silicon Oscillators with Enable or Autoenable The MAX7393/MAX7394 precision silicon oscillators replace crystals, ceramic resonators, and crystal oscillator modules in systems with a +2.4V to +3.6V operating supply voltage range. The MAX7393/MAX7394 consist of a temperature-compensated precision oscillator with enable (MAX7394) or autoenable (MAX7393). The MAX7393/MAX7394 are supplied at specific frequencies, just like crystals and resonators. Output frequency accuracy is guaranteed to be within ±0.25% (TDFN) and ±1.3% (µDFN) (0°C to +85°C) and ±1.0% (TDFN) and ±1.8% (µDFN) over the -40°C to +125°C temperature range. The small size and robust operation of the MAX7393/ MAX7394 make them ideal for space-constrained or environmentally demanding applications where high accuracy is required. The high accuracy of the MAX7393/ MAX7394 is ideal for use in USB applications, computers, and white goods. The MAX7393/MAX7394 are available in 6-pin, 3mm x 3mm TDFN and 2mm x 2mm µDFN packages. They are specified for the -40°C to +125°C temperature range. Features ♦ ±0.25% (TDFN) and ±1.3% (µDFN) Total Accuracy for 0°C to +85°C ♦ ±1.0% (TDFN) and ±1.8% (µDFN) Total Accuracy for -40°C to +125°C ♦ Resistant to Humidity and Vibration ♦ 12mA Operating Current (48MHz Version) ♦ 5ns Output Rise/Fall Time ♦ 40% to 60% Maximum Duty Cycle ♦ No External Components Required ♦ +2.4V to +3.6V Operation ♦ Available Factory-Set Frequencies from 922kHz to 48MHz ♦ Space-Saving TDFN and µDFN Surface-Mount Packages Ordering Information Applications USB CAN Nodes Automotive Systems Computers Handheld Products White Goods Typical Application Circuits 2.4V TO 3.6V 6 1 VCC2 CLOCK VCC 5 OSC1 4 OSC2 5 OSC1 µC I.C. GND 3 2 TEMP RANGE PINPACKAGE PKG CODE MAX7393ALT_ _+ -40°C to +125°C 6 µDFN L622-1 MAX7393ATT_ _+ -40°C to +125°C 6 TDFN T633-1 MAX7394ALT_ _+ -40°C to +125°C 6 µDFN L622-1 MAX7394ATT_ _+ -40°C to +125°C 6 TDFN T633-1 *The two-letter frequency suffix following the part number is found in the Selector Guide. +Denotes lead-free package. Note: The MAX7394 is available in factory-set frequencies from 922kHz to 48MHz. The MAX7393 is available in factory-set frequencies from 922kHz to 20MHz. There are 10 standard frequencies (see the Selector Guide) with a required 2.5k order increment. Nonstandard frequencies are also available with a required 10k order increment. For nonstandard versions, contact factory for availability and ordering information. MAX7393 CLKIN PART* 2.4V TO 3.6V 6 1 VCC2 CLOCK VCC µC MAX7394 4 ENABLE I.C. 3 OSC2 GND 2 Selector Guide and Pin Configurations appear at end of data sheet. ________________________________________________________________ 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 MAX7393/MAX7394 General Description MAX7393/MAX7394 Precision Silicon Oscillators with Enable or Autoenable ABSOLUTE MAXIMUM RATINGS VCC, VCC2 to GND.................................................-0.3V to +4.0V CLOCK, CLKIN, ENABLE, I.C. to GND ......-0.3V to (VCC + 0.3V) CLOCK Output Current ....................................................±50mA Continuous Power Dissipation (TA = +70°C) 6-Pin µDFN (derate 4.5mW/°C over +70°C) ................358mW 6-Pin TDFN (derate 18.2mW/°C over +70°C) ............1455mW 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 (VCC = VCC2 = +2.4V to +3.6V, CL = 10pF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = VCC2 = +3.3V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Operating Supply Voltage VCC 2.4 3.6 V Operating Output Supply Voltage VCC2 2.4 3.6 V Total Operating Supply Current (Note 2) Total Shutdown Supply Current ITOT ISHDN 922kHz, MAX739_ _ _ _LY 4.4 4MHz, MAX739_ _ _ _RD 5.4 8MHz, MAX739_ _ _ _TP 5.8 16MHz, MAX739_ _ _ _WB 6.5 32MHz, MAX7394_ _ _ YN 9.2 33MHz, MAX7394_ _ _ YQ 9.5 48MHz, MAX7394_ _ _ ZY 12 Oscillator disabled, CLKIN = high (MAX7393), ENABLE = low (MAX7394) (Note 2) 1 2 mA µA LOGIC INPUTS (ENABLE, CLKIN) Logic Input High Voltage VIH Logic Input Low Voltage VIL 0.7 x VCC2 V 0.3 x VCC2 V CLOCK OUTPUT Output High Voltage VOH VCC2 ≥ 2.4V, ISOURCE = 5mA Output Low Voltage VOL VCC2 ≥ 2.4V, ISINK = 5mA VCC2 - 0.3 V 0.3 V Output Rise Time tR (Note 3) 5 ns Output Fall Time tF (Note 3) 5 ns Duty Cycle (Note 3) 47 % Startup Time Time for output to stabilize 2 ms Output Jitter (Note 3) 2 Peak-to-peak jitter, 16MHz (MAX7394) 180 Peak-to-peak jitter, 48MHz (MAX7394) 140 _______________________________________________________________________________________ ps Precision Silicon Oscillators with Enable or Autoenable (VCC = VCC2 = +2.4V to +3.6V, CL = 10pF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = VCC2 = +3.3V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS FREQUENCY ACCURACY Clock Frequency Coefficient of Temperature VCC = VCC2 = 3.3V Clock Frequency Coefficient of Supply Voltage TA = +25°C TA = 0°C to +70°C ±20 TA = -40°C to +125°C ±50 0.1 TDFN TA = 0°C to (Note 4) +85°C, VCC = ±10% µDFN (Note 5) Total Accuracy VCC = VCC2 = 3.3V ppm/°C 0.15 %/V ±0.25 ±1.3 % TDFN (Note 4) TA = -40°C to +125°C, VCC = ±10% µDFN (Note 5) ±1.0 ±1.8 Note 1: All parameters are production tested at TA = +25°C. Specifications over temperature are guaranteed by design and characterization. Note 2: The total supply current is the sum of ICC and ICC2. Note 3: Guaranteed by design and characterization. Not production tested. Note 4: Output frequency is production tested at TA = +25°C and TA = +85°C. Note 5: Output frequency is production tested at TA = +25°C. _______________________________________________________________________________________ 3 MAX7393/MAX7394 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VCC = VCC2 = 3.3V, TA = +25°C, MAX7394, 48MHz output, unless otherwise noted.) DUTY CYCLE (%) 54 56 52 50 48 54 52 50 48 46 46 44 44 42 42 40 40 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) 2.6 2.8 3.0 3.2 SUPPLY VOLTAGE (V) 3.4 5 4 0.999 0.998 0.997 3 2 3.4 2.6 2.8 3.0 3.2 SUPPLY VOLTAGE (V) TOTAL SUPPLY CURRENT vs. FREQUENCY MAX7393 toc07 VCC = VCC2 = +3.6V 7 0.998 0.996 0.994 3.4 3.6 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) MAX7393 SETTLING TIME FROM START 9 8 1.000 0.990 2.4 3.6 1.002 0.992 0.995 0 VCC = VCC2 = +3.3V MAX7393 toc08 (SEE FIGURE 1) 20MHz ON/OFF 2V/div 6 5 4 CLOCK 2V/div VCC = VCC2 = +2.4V 3 2 1 0 0 4 6 12 VCC = VCC2 = +2.4V NORMALIZED FREQUENCY vs. TEMPERATURE 0.996 2 VCC = VCC2 = +3.3V -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) NORMALIZED FREQUENCY 4 TOTAL SUPPLY CURRENT (mA) 6 3.6 MAX7393/4 toc05 1.000 NORMALIZED FREQUENCY 6 2.8 3.0 3.2 SUPPLY VOLTAGE (V) 7 0 2.4 MAX7393 toc04 8 2.6 8 NORMALIZED FREQUENCY vs. SUPPLY VOLTAGE 10 VCC = VCC2 = +3.6V 1 TOTAL SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.4 9 MAX7393/4 toc06 56 58 TOTAL SUPPLY CURRENT (mA) 58 10 MAX7393/4 toc01 60 MAX7393/4 toc01 60 DUTY CYCLE (%) TOTAL SUPPLY CURRENT vs. TEMPERATURE DUTY CYCLE vs. SUPPLY VOLTAGE MAX7393/4 toc03 DUTY CYCLE vs. TEMPERATURE TOTAL SUPPLY CURRENT (mA) MAX7393/MAX7394 Precision Silicon Oscillators with Enable or Autoenable 18 24 30 36 FREQUENCY (MHz) 42 48 400µs/div _______________________________________________________________________________________ Precision Silicon Oscillators with Enable or Autoenable CLOCK OUTPUT WAVEFORM WITH CL = 10pF MAX7394 SETTLING TIME FROM START MAX7393 toc10 MAX7393 toc09 ENABLE 2V/div CLOCK 1V/div CLOCK 2V/div 400µs/div 10ns/div Pin Description PIN NAME FUNCTION MAX7393 MAX7394 1 1 VCC Positive Supply Voltage Input. Bypass VCC to GND with 0.1µF capacitors placed as close to the device as possible. Connect VCC to VCC2. 2 2 GND Ground 3 3 I.C. Internally Connected. Connect I.C. to GND. Do not connect I.C. to any other input or output. Do not leave I.C. unconnected. 4 — CLKIN Clock Input. Connect CLKIN to a returned clock signal source (see the Autoenable (CLKIN, MAX7393) section). 5 5 CLOCK 6 6 VCC2 — 4 ENABLE — — EP Clock Output. CLOCK is a rail-to-rail, push-pull output. Positive Supply Voltage Input for Output Driver. Bypass VCC2 to GND with a 0.1µF capacitor placed as close to the device as possible. Connect VCC2 to VCC. Enable Input. Drive ENABLE low to place the MAX7394 in shutdown mode. Drive ENABLE high for normal operation. Exposed Paddle, TDFN Version Only. Connect EP to ground. Do not connect EP to any other input or output. _______________________________________________________________________________________ 5 MAX7393/MAX7394 Typical Operating Characteristics (continued) (VCC = VCC2 = 3.3V, TA = +25°C, MAX7394, 48MHz output, unless otherwise noted.) MAX7393/MAX7394 Precision Silicon Oscillators with Enable or Autoenable Detailed Description The MAX7393/MAX7394 precision silicon oscillators replace crystals, ceramic resonators, and crystal oscillator modules in systems with a +2.4V to +3.6V operating supply voltage range. The MAX7393/MAX7394 consist of a temperature-compensated precision oscillator with enable (MAX7394) or autoenable (MAX7393). The ENABLE input on the MAX7394 manually enables or disables the oscillator. The CLKIN input on the MAX7393 monitors a returned clock signal to automatically enable or disable the MAX7393 oscillator. The MAX7393/MAX7394 are supplied at specific frequencies, like crystals and resonators. A variety of popular standard frequencies are available (see the Selector Guide). Output frequency accuracy is guaranteed to be within ±0.25% (TDFN) and ±1.3% (µDFN) (0°C to +85°C) and ±1.0% (TDFN) and ±1.8% (µDFN) over the -40°C to +125°C temperature range. No external components are required to generate the specific frequency. ENABLE (MAX7394) The ENABLE input on the MAX7394 turns the oscillator on and off. Drive ENABLE to a logic-high for normal operation. Drive ENABLE to a logic-low to place the device in shutdown mode. During shutdown, the oscillator is turned off, and the CLOCK output is weakly driven high with an internal 10kΩ to VCC2. In shutdown mode, the total supply current reduces to less than 2µA. Autoenable (CLKIN, MAX7393) The MAX7393 features a CLKIN input that automatically enables or disables the oscillator by sensing the condition of a returned clock signal. The MAX7393 is automatically enabled whenever an active inversion function is sensed between CLOCK and CLKIN. When no inversion function is detected, the MAX7393 automatically enters shutdown mode. During shutdown, the oscillator is turned off, the CLKIN input is weakly driven to its last state, and the CLOCK output is weakly driven to the logic-level in CLKIN. The CLKIN input relies on an external inversion function, typically provided by a microcontroller’s clock generator, to provide an inverted version of the CLOCK output signal. The MAX7393 interprets high/low voltage or a constant high-impedance node on CLKIN as a disable signal. Figure 1 shows a test circuit to enable or disable the MAX7393. One input of the NAND gate connects to the CLOCK output of the MAX7393, and the other input is driven with a logic level. A logic-high level enables the oscillator and a logic-low level disables the oscillator. See the Typical Operating Characteristics for typical startup performance of the MAX7393. 6 CLOCK MAX7393 ON/OFF CLKIN Figure 1. Test Circuit to Enable or Disable the MAX7393 Oscillator Oscillator (CLOCK) The CLOCK output is a push-pull, CMOS logic output that is capable of driving a ground-connected 1kΩ load or a positive supply connected 500Ω load to within 300mV of either supply rail. There are no impedancematching issues when using the MAX7393/MAX7394 CLOCK output. A typical startup characteristic is shown in the Typical Operating Characteristics. Output Jitter The MAX7393/MAX7394s’ jitter performance is given in the Electrical Characteristics table as a peak-to-peak value. Applications Information Interfacing to a Microcontroller Clock Input The MAX7393/MAX7394 CLOCK output is a push-pull, CMOS logic output that directly drives any microprocessor (µP) or microcontroller (µC) clock input. There are no impedance-matching issues when using the MAX7393/MAX7394. Operate the MAX7393/MAX7394 and microcontroller from the same supply voltage level of VCC2 (see the Power-Supply Considerations section for more details). Refer to the microcontroller’s data sheet for clock input compatibility with external clock signals. The MAX7393/MAX7394 require no biasing components or load capacitance. When using the MAX7393/ MAX7394 to retrofit a crystal oscillator, remove all biasing components from the oscillator input. Power-Supply Considerations The MAX7393/MAX7394 operate with power-supply voltages in the +2.4V to +3.6V range. Connect VCC and VCC2 to the same supply voltage level as the device receiving the clock. Proper power-supply decoupling is required to maintain the power-supply rejection performance of the MAX7393/MAX7394. Connect 0.1µF surface-mount ceramic capacitors from VCC to VCC2 to GND. Position these bypass capacitors as close to VCC and VCC2 as possible. A larger VCC2 bypass capacitor value is recommended if the MAX7393/MAX7394 are to operate with a large capacitive load. Use a bypass capacitor value on VCC2 at least 1000 times that of the output load capacitance. _______________________________________________________________________________________ Precision Silicon Oscillators with Enable or Autoenable TOP VIEW OF BOTTOM LEADS PART FREQUENCY PACKAGE TOP MARK VCC2 CLOCK CLKIN MAX7393ATTLY 922kHz 6 TDFN +ANP 6 5 4 MAX7393ALTLY 922kHz 6 µDFN +ABO MAX7393ATTMG 1MHz 6 TDFN +ANQ MAX7393ALTMG 1MHz 6 µDFN +ABP MAX7393 1 + VCC MAX7393ATTRD 4MHz 6 TDFN +ANR 2 3 MAX7393ALTRD 4MHz 6 µDFN +ABQ GND I.C. MAX7393ATTTP 8MHz 6 TDFN +ANS MAX7393ALTTP 8MHz 6 µDFN +ABR MAX7393ATTWB 16MHz 6 TDFN +AMN MAX7393ALTWB 16MHz 6 µDFN +AAR MAX7393ATTWV 20MHz 6 TDFN +AMO MAX7393ALTWV 20MHz 6 µDFN +AAS MAX7394ATTLY 922kHz 6 TDFN +ANV MAX7394ALTLY 922kHz 6 µDFN +ABU MAX7394ATTMG 1MHz 6 TDFN +ANW MAX7394ALTMG 1MHz 6 µDFN +ABV MAX7394ATTRD 4MHz 6 TDFN +ANX MAX7394ALTRD 4MHz 6 µDFN +ABW MAX7394ATTTP 8MHz 6 TDFN +ANY MAX7394ALTTP 8MHz 6 µDFN +ABX MAX7394ATTWB 16MHz 6 TDFN +AMU MAX7394ALTWB 16MHz 6 µDFN +AAY MAX7394ATTWV 20MHz 6 TDFN +AMV MAX7394ALTWV 20MHz 6 µDFN +AAZ MAX7394ATTYN 32MHz 6 TDFN +ANZ MAX7394ALTYN 32MHz 6 µDFN +ABY MAX7394ATTYQ 33MHz 6 TDFN +AMX MAX7394ALTYQ 33MHz 6 µDFN +ABB MAX7394ATTZH 40MHz 6 TDFN +AOA MAX7394ALTZH 40MHz 6 µDFN +ABZ MAX7394ATTZY 48MHz 6 TDFN +AMZ MAX7394ALTZY 48MHz 6 µDFN +ABD µDFN VCC2 CLOCK CLKIN 6 5 4 *EP MAX7393 + 1 VCC 2 3 GND I.C. TDFN *EXPOSED PADDLE. CONNECT EP TO GROUND. VCC2 CLOCK ENABLE 6 5 4 MAX7394 + 1 2 3 VCC GND I.C. µDFN VCC2 6 CLOCK ENABLE 5 4 *EP Chip Information MAX7394 PROCESS: BiCMOS + 1 2 3 VCC GND I.C. TDFN *EXPOSED PADDLE. CONNECT EP TO GROUND. _______________________________________________________________________________________ 7 MAX7393/MAX7394 Selector Guide Pin Configurations 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.) 6, 8, &10L, DFN THIN.EPS MAX7393/MAX7394 Precision Silicon Oscillators with Enable or Autoenable PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm 21-0137 COMMON DIMENSIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.70 0.80 T633-1 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF E 2.90 3.10 T833-1 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF A1 0.00 0.05 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF 0.40 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF 2.00 REF 0.20 1 2 PACKAGE VARIATIONS SYMBOL L H [(N/2)-1] x e k 0.25 MIN. T1033-1 10 1.50±0.10 A2 0.20 REF. T1033-2 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF T1433-2 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm -DRAWING NOT TO SCALE- 8 21-0137 H 2 2 _______________________________________________________________________________________ Precision Silicon Oscillators with Enable or Autoenable XXXX XXXX XXXX b e 6, 8, 10L UDFN.EPS A D N SOLDER MASK COVERAGE E PIN 1 0.10x45∞ L L1 1 SAMPLE MARKING PIN 1 INDEX AREA A A (N/2 -1) x e) 7 CL CL b L A A2 L e EVEN TERMINAL A1 e ODD TERMINAL PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm 21-0164 -DRAWING NOT TO SCALE- A 1 2 COMMON DIMENSIONS SYMBOL MIN. NOM. A 0.70 0.75 0.80 A1 0.15 0.20 0.25 A2 0.020 0.025 D 1.95 2.00 E 1.95 2.00 L 0.30 0.40 L1 MAX. 0.035 - 2.05 2.05 0.50 0.10 REF. PACKAGE VARIATIONS PKG. CODE N e b (N/2 -1) x e L622-1 6 0.65 BSC 0.30±0.05 1.30 REF. L822-1 8 0.50 BSC 0.25±0.05 1.50 REF. L1022-1 10 0.40 BSC 0.20±0.03 1.60 REF. PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm 21-0164 -DRAWING NOT TO SCALE- A 2 2 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 _____________________ 9 © 2006 Maxim Integrated Products Springer Printed USA is a registered trademark of Maxim Integrated Products, Inc. MAX7393/MAX7394 Package Information (continued) (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.)