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19-3221; Rev 0; 1/04
KIT ATION EVALU ABLE AVAIL
300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
General Description Features
+2.1V to +3.6V Single-Supply Operation OOK/ASK Transmit Data Format Up to 100kbps Data Rate +13dBm Output Power into 50 Load Low 7.7mA (typ) Operating Supply Current* Uses Small, Low-Cost Crystal Small 3mm x 3mm 8-Pin SOT23 Package Fast-On Oscillator: 250s Startup Time * At 50% duty cycle (315MHz, 2.7V supply, +13dBm output power)
MAX7044
The MAX7044 crystal-referenced phase-locked-loop (PLL) VHF/UHF transmitter is designed to transmit OOK/ASK data in the 300MHz to 450MHz frequency range. The MAX7044 supports data rates up to 100kbps, and provides output power up to +13dBm into a 50 load while only drawing 7.7mA at 2.7V. The crystal-based architecture of the MAX7044 eliminates many of the common problems with SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence. The MAX7044 also features a low supply voltage of +2.1V to +3.6V. These improvements enable better overall receiver performance when using the MAX7044 together with a superheterodyne receiver such as the MAX1470 or MAX1473. A simple, single-input data interface and a buffered clock-out signal at 1/16th the crystal frequency make the MAX7044 compatible with almost any microcontroller or code-hopping generator. The MAX7044 is available in an 8-pin SOT23 package and is specified over the -40C to +125C automotive temperature range.
Ordering Information
PART MAX7044AKA-T TEMP RANGE PINPACKAGE TOP MARK AEJW
Applications
Remote Keyless Entry (RKE) Tire-Pressure Monitoring (TPM) Security Systems Garage Door Openers RF Remote Controls Wireless Game Consoles Wireless Computer Peripherals Wireless Sensors
-40C to +125C 8 SOT23-8
Typical Application Circuit
TOP VIEW
3.0V 1 100nF 220pF 680pF 2 XTAL1 GND fXTAL XTAL2 VDD DATA 8 7 3.0V
Pin Configuration
XTAL1 1
100nF
8 7
XTAL2 VDD DATA CLKOUT
GND PAGND
2
MAX7044
6
ANTENNA
3
MAX7044
PAGND
3
6 5
DATA INPUT CLOCK OUTPUT (fCLKOUT = fXTAL/16)
PAOUT 4
4
PAOUT CLKOUT
5
SOT23
________________________________________________________________ Maxim Integrated Products
1
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300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter MAX7044
ABSOLUTE MAXIMUM RATINGS
VDD to GND ..........................................................-0.3V to +4.0V All Other Pins to GND ................................-0.3V to (VDD + 0.3V) Continuous Power Dissipation (TA = +70C) 8-Pin SOT23 (derate 8.9mW/C above +70C)............714mW Operating Temperature Range .........................-40C to +125C Storage Temperature Range .............................-60C to +150C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
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, all RF inputs and outputs are referenced to 50, VDD = +2.1V to +3.6V, TA = -40C to +125C, unless otherwise noted. Typical values are at VDD = +2.7V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYSTEM PERFORMANCE Supply Voltage VDD VDATA at 50% duty cycle, (Notes 3, 4) fRF = 315MHz Supply Current (Note 2) IDD fRF = 433MHz PA on (Note 5) PA off (Note 6) VDATA at 50% duty cycle, (Notes 3, 4) PA on (Note 5) PA off (Note 6) Standby Current Frequency Range (Note 4) Data Rate (Note 4) Modulation Depth (Note 8) ON to OFF POUT ratio TA = +25C, VDD = +2.7V Output Power, PA On (Notes 4, 5) POUT fRF = 300MHz to 450MHz TA = +125C, VDD = +2.1V TA = -40C, VDD = +3.6V Turn-On Time (Note 8) Transmit Efficiency with CW (Notes 5, 10) Transmit Efficiency with 50% OOK (Notes 3, 10) tON Oscillator settled to within 50kHz Oscillator settled to within 5kHz fRF = 315MHz fRF = 433MHz fRF = 315MHz fRF = 433MHz 9.6 5.9 13.1 ISTDBY fRF VDATA < VIL for more than WAIT time (Notes 4, 7) TA < +25C TA < +125C 300 0 90 12.5 9.0 15.8 220 450 48 47 43 41 15.4 12.0 18.5 s % % dBm 2.1 7.7 13.8 1.7 8.0 14.0 1.9 40 550 3.6 14.1 25.4 2.8 14.4 25.7 3.1 130 2900 450 100 nA MHz kbps dB mA V SYMBOL CONDITIONS MIN TYP MAX UNITS
2
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300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, all RF inputs and outputs are referenced to 50, VDD = +2.1V to +3.6V, TA = -40C to +125C, unless otherwise noted. Typical values are at VDD = +2.7V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER PHASE-LOCKED LOOP (PLL) VCO Gain fRF = 315MHz Phase Noise fRF = 433MHz Maximum Carrier Harmonics Reference Spur Loop Bandwidth Crystal Frequency Frequency Pulling by VDD Maximum Crystal Inductance Crystal Load Capacitance DATA INPUT Data Input High Data Input Low Maximum Input Current Pulldown Current CLKOUT OUTPUT Output Voltage Low Output Voltage High Load Capacitance CLKOUT Frequency VOL VOH CLOAD ISINK = 650A (Note 4) ISOURCE = 350A (Note 4) (Note 4) fXTAL / 16 VDD 0.25 10 0.25 V V pF Hz VIH VIL 10 10 VDD 0.25 0.25 V V A A fXTAL fRF = 315MHz fRF = 433MHz fRF = 315MHz fRF = 433MHz fOFFSET = 100kHz fOFFSET = 1MHz fOFFSET = 100kHz fOFFSET = 1MHz 330 -80 -90 -77 -87 -50 -50 -74 -80 1.6 fRF/32 3 50 3 dBc dBc MHz MHz ppm/V H pF dBc/Hz MHz/V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX7044
Note 1: Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match. Note 2: Production tested at TA = +25C with fRF = 300MHz and 450MHz. Guaranteed by design and characterization over temperature and frequency. Note 3: 50% duty cycle at 10kbps with Manchester coding. Note 4: Guaranteed by design and characterization, not production tested. Note 5: PA output is turned on in test mode by VDATA = VCC/2 + 100mV. Note 6: PA output is turned off in test mode by VDATA = VCC/2 - 100mV. Note 7: Wait time: tWAIT = (216 x 32) / fRF. Note 8: Generally limited by PC board layout. Note 9: VDATA = VIL to VDATA = VIH after VDATA = VIL for WAIT time: tWAIT = (216 x 32) / fRF. Note 10: VDATA = VIH. Efficiency = POUT/(VDD x IDD).
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300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter MAX7044
Typical Operating Characteristics
(Typical Application Circuit, VDD = +2.7V, TA = +25C, unless otherwise noted.) (Note 1)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX7044 toc01
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX7044 toc02
SUPPLY CURRENT vs. SUPPLY VOLTAGE
fRF = 433MHz PA ON TA = -40C 18 16 14 12 TA = +125C 10 8 TA = +25C TA = +85C
MAX7044 toc03
23 21 SUPPLY CURRENT (mA) 19 17 15
fRF = 315MHz PA ON TA = -40C
13 12 SUPPLY CURRENT (mA) 11 10 9 8 7 6 5
22 20 SUPPLY CURRENT (mA)
fRF = 315MHz PA 50% DUTY CYCLE AT 10kHz
TA = +25C TA = -40C TA = +85C
TA = +25C TA = +85C
13 11 9 7 2.1 2.4 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V) TA = +125C
TA = +125C
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX7044 toc04
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX7044 toc05
OUTPUT POWER vs. SUPPLY VOLTAGE
fRF = 433MHz PA ON
MAX7044 toc06
14 13 SUPPLY CURRENT (mA) 12 11 10 9 8 7 6 2.1
fRF = 433MHz PA 50% DUTY CYCLE AT 10kHz TA = -40C TA = +25C
18
fRF = 315MHz PA ON
18
16 OUTPUT POWER (dBm) TA = +25C
TA = -40C
TA = -40C TA = +25C
16 OUTPUT POWER (dBm)
14
14 TA = +85C
TA = +85C 12 TA = +125C
12
TA = +85C TA = +125C
10
10
TA = +125C
8 2.4 2.7 3.0 3.3 3.6 2.1 2.4 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V)
8 2.1 2.4 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V)
REFERENCE SPUR MAGNITUDE vs. SUPPLY VOLTAGE
MAX7044 toc07
FREQUENCY STABILITY vs. SUPPLY VOLTAGE
MAX7044 toc08
TRANSMIT POWER EFFICIENCY vs. SUPPLY VOLTAGE
65 60 55 50 45 40 35 30 TA = +125C TA = +85C fRF = 315MHz PA ON TA = -40C TA = +25C
MAX7044 toc09
-70 REFERENCE SPUR MAGNITUDE (dBc)
3 2 1 0 -1 -2 -3 fRF = 433MHz
REFERENCE SPUR = fRF fXTAL
70 TRANSMIT POWER EFFICIENCY (%)
-72
-74
fRF = 433MHz
FREQUENCY STABILITY (ppm)
fRF = 315MHz
-76
-78
fRF = 315MHz
-80 2.1 2.4 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V)
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
4
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300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter MAX7044
Typical Operating Characteristics (continued)
(Typical Application Circuit, VDD = +2.7V, TA = +25C, unless otherwise noted.) (Note 1)
TRANSMIT POWER EFFICIENCY vs. SUPPLY VOLTAGE
MAX7044 toc10
TRANSMIT POWER EFFICIENCY vs. SUPPLY VOLTAGE
MAX7044 toc11
TRANSMIT POWER EFFICIENCY vs. SUPPLY VOLTAGE
55 50 45 40 35 30 25 20 15 TA = +125C TA = +85C fRF = 433MHz PA 50% DUTY CYCLE AT 10kHz TA = -40C TA = +25C
MAX7044 toc12
60 TRANSMIT POWER EFFICIENCY (%) 55 50 45 40 35 30 25 20
TRANSMIT POWER EFFICIENCY (%)
TA = -40C
TA = +25C
60 55 50 45 40
TA = +25C
TA = +85C TA = +125C
TA = +85C TA = +125C
35 30 2.1 2.4 2.7 3.0 3.3 3.6
TRANSMIT POWER EFFICIENCY (%)
fRF = 315MHz PA 50% DUTY CYCLE AT 10kHz
70 65
fRF = 433MHz PA ON
60
TA = -40C
2.1
2.4
2.7
3.0
3.3
3.6
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
PHASE NOISE vs. OFFSET FREQUENCY
MAX7044 toc13
SUPPLY CURRENT AND OUTPUT POWER vs. EXTERNAL RESISTOR
18 16 SUPPLY CURRENT (mA) 14 12 10 8 6 4 2 0 fRF = 315MHz PA ON 1 10 100 1000 CURRENT
MAX7044 toc14
SUPPLY CURRENT vs. OUTPUT POWER
fRF = 315MHz 12 15 SUPPLY CURRENT (mA) OUTPUT POWER (dBm) 8 4 0 -4 -8 -12 12 PA ON 9 6 3 0 -10 -6 -2 2 6 10 14 OUTPUT POWER (dBm)
MAX7044 toc15
-40 -50 -60 PHASE NOISE (dBc/Hz) -70 -80 -90 -100 -110 -120 -130 -140 0.01 0.1 1 10 100 1k
16
18
POWER
50% DUTY CYCLE
10k
-16 10,000
OFFSET FREQUENCY (Hz)
EXTERNAL RESISTOR ()
FREQUENCY SETTLING TIME
MAX7044 toc16
AM DEMODULATION OF PA OUTPUT DATA RATE = 100kHz
MAX7044 toc17
OUTPUT SPECTRUM
MAX7044 toc18
50kHz/div
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300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter MAX7044
Typical Operating Characteristics (continued)
(Typical Application Circuit, VDD = +2.7V, TA = +25C, unless otherwise noted.) (Note 1)
CLKOUT SPUR MAGNITUDE vs. SUPPLY VOLTAGE
fRF = 315MHz
MAX7044 toc19
-40 CLKOUT SPUR MAGNITUDE (dBc)
-43
-46
-49
-52
-55 2.1 2.4 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V)
Pin Description
PIN 1 2 3 4 5 6 7 8 NAME XTAL1 GND PAGND PAOUT CLKOUT DATA VDD XTAL2 1st Crystal Input. fXTAL = fRF / 32. Ground. Connect to system ground. Ground for the Power Amplifier (PA). Connect to system ground. Power-Amplifier Output. The PA output requires a pullup inductor to the supply voltage, which can be part of the output-matching network to an antenna. Buffered Clock Output. The frequency of CLKOUT is fXTAL / 16. OOK Data Input. DATA also controls the power-up state (see the Shutdown Mode section). Supply Voltage. Bypass to GND with a 100nF capacitor as close to the pin as possible. 2nd Crystal Input. fXTAL = fRF / 32. FUNCTION
Functional Diagram
DATA
Detailed Description
The MAX7044 is a highly integrated ASK transmitter operating over the 300MHz to 450MHz frequency band. The IC requires only a few external components to complete a transmit solution. The MAX7044 includes a complete PLL and a highly efficient power amplifier. The device is automatically placed into a low-power shutdown mode and powers up when data is detected on the data input.
MAX7044
DATA ACTIVITY DETECTOR
VDD GND
PA
PAOUT
PAGND LOCK DETECT 32x PLL
Shutdown Mode
/16 CLKOUT
XTAL1 XTAL2
CRYSTALOSCILLATOR DRIVER
The MAX7044 has an automatic shutdown mode that places the device in low-power mode if the DATA input has not toggled for a specific amount of time (wait time). The wait time is equal to 216 clock cycles of the crystal. This equates to a wait time of approximately 6.66ms for
6
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300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
a 315MHz RF frequency and 4.84ms for a 433MHz RF frequency. For other frequencies, calculate the wait time with the following equation: tWAIT = 216 x 32 fRF overall efficiency is 48% with the efficiency of the power amplifier itself greater than 54%.
MAX7044
Buffered Clock Output
The MAX7044 provides a buffered clock output (CLKOUT) for easy interface to a microcontroller or frequency-hopping generator. The frequency of CLKOUT is 1/16 the crystal frequency. For a 315MHz RF transmit frequency, a crystal of 9.84375MHz is used, giving a clock output of 615.2kHz. For a 433.92MHz RF frequency, a crystal of 13.56MHz is used for a clock output of 847.5kHz. The clock output is inactive when the device is in shutdown mode. The device is placed in shutdown mode by the internal data activity detector (see the Shutdown Mode section). Once data is detected on the data input, the clock output is stable after approximately 220s.
where tWAIT is the wait time to shutdown and fRF is the RF transmit frequency. When the device is in shutdown, a rising edge on DATA initiates the warm up of the crystal and PLL. The crystal and PLL must have 220s settling time before data can be transmitted. The 220s turn-on time of the MAX7044 is dominated by the crystal oscillator startup time. Once the oscillator is running, the 1.6MHz PLL loop bandwidth allows fast frequency recovery during power amplifier toggling. When the device is operating, each edge on the data line resets an internal counter to zero and it begins to count again. If no edges are detected on the data line, the counter reaches the end-of-count (216 clock cycles) and places the device in shutdown mode. If there is an edge on the data line before the counter hits the end of count, the counter is reset and the process starts over.
Applications Information
Output Power Adjustment
It is possible to adjust the output power down to -15dBm with the addition of a resistor (see RPWRADJ in Figure 1). The addition of the power adjust resistor also reduces power consumption. See the Supply Current and Output Power vs. External Resistor and Supply Current vs. Output Power graphs in the Typical Operating Characteristics section. It is imperative to add both a low-frequency and a high-frequency decoupling capacitor as shown in Figure 1.
Phase-Locked Loop
The PLL block contains a phase detector, charge pump, integrated loop filter, VCO, asynchronous 32x clock divider, and crystal oscillator. This PLL requires no external components. The relationship between the carrier and crystal frequency is given by: fXTAL = fRF / 32 The lock-detect circuit prevents the power amplifier from transmitting until the PLL is locked. In addition, the device shuts down the power amplifier if the reference frequency is lost.
Crystal Oscillator
The crystal oscillator in the MAX7044 is designed to present a capacitance of approximately 3pF between the XTAL1 and XTAL2 pins. If a crystal designed to oscillate with a different load capacitance is used, the crystal is pulled away from its intended operating fre3.0V fXTAL 100nF RPWRADJ 1 2 220pF ANTENNA 680pF 3 XTAL1 GND XTAL2 VDD DATA 8 7 3.0V
Power Amplifier
The PA of the MAX7044 is a high-efficiency, opendrain, class-C amplifier. With a proper output matching network, the PA can drive a wide range of impedances, including the small-loop PC board trace antenna and any 50 antenna. The output-matching network for an antenna with a characteristic impedance of 50 is shown in the Typical Application Circuit. The outputmatching network suppresses the carrier harmonics and transforms the antenna impedance to an optimal impedance at PAOUT, which is about 125. When the output matching network is properly tuned, the power amplifier transmits power with high efficiency. The Typical Application Circuit delivers +13dBm at +2.7V supply with 7.7mA of supply current. Thus, the
100nF
MAX1434
PAGND
6
DATA INPUT CLOCK OUTPUT (fCLKOUT = fXTAL/16)
4
PAOUT CLKOUT
5
Figure 1. Output Power Adjustment Circuit 7
_______________________________________________________________________________________
300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
quency, thus introducing an error in the reference frequency. Crystals designed to operate with higher differential load capacitance always pull the reference frequency higher. For example, a 9.84375MHz crystal designed to operate with a 10pF load capacitance oscillates at 9.84688MHz with the MAX7044, causing the transmitter to be transmitting at 315.1MHz rather than 315.0MHz, an error of about 100kHz, or 320ppm. In actuality, the oscillator pulls every crystal. The crystal's natural frequency is really below its specified frequency, but when loaded with the specified load capacitance, the crystal is pulled and oscillates at its specified frequency. This pulling is already accounted for in the specification of the load capacitance. Additional pulling can be calculated if the electrical parameters of the crystal are known. The frequency pulling is given by: fp = where: fp is the amount the crystal frequency is pulled in ppm. Cm is the motional capacitance of the crystal. Ccase is the case capacitance. Cspec is the specified load capacitance. Cload is the actual load capacitance. When the crystal is loaded as specified, i.e., Cload = Cspec, the frequency pulling equals zero. 1 1 Cm - x 106 C 2 case + Cload Ccase + Cspec antenna. The antenna is usually fabricated out of a copper trace on a PC board in a rectangular, circular, or square pattern. The antenna will have an impedance that consists of a lossy component and a radiative component. To achieve high radiating efficiency, the radiative component should be as high as possible, while minimizing the lossy component. In addition, the loop antenna will have an inherent loop inductance associated with it (assuming the antenna is terminated to ground). For example, in a typical application, the radiative impedance is less than 0.5, the lossy impedance is less than 0.7, and the inductance is approximately 50nH to 100nH. The objective of the matching network is to match the power amplifier output to the small-loop antenna. The matching components thus transform the low radiative and resistive parts of the antenna into the much higher value of the PA output. This gives higher efficiency. The low radiative and lossy components of the small-loop antenna result in a higher Q matching network than the 50 network; thus, the harmonics are lower.
MAX7044
Layout Considerations
A properly designed PC board is an essential part of any RF/microwave circuit. At the power amplifier output, use controlled-impedance lines and keep them as short as possible to minimize losses and radiation. At high frequencies, trace lengths that are approximately 1/20 the wavelength or longer become antennas. For example, a 2in trace at 315MHz can act as an antenna. Keeping the traces short also reduces parasitic inductance. Generally, 1in of PC board trace adds about 20nH of parasitic inductance. The parasitic inductance can have a dramatic effect on the effective inductance. For example, a 0.5in trace connecting a 100nH inductor adds an extra 10nH of inductance, or 10%. To reduce the parasitic inductance, use wider traces and a solid ground or power plane below the signal traces. Using a solid ground plane can reduce the parasitic inductance from approximately 20nH/in to 7nH/in. Also, use low-inductance connections to ground on all GND pins, and place decoupling capacitors close to all VDD connections.
Output Matching to 50
When matched to a 50 system, the MAX7044 PA is capable of delivering up to +13dBm of output power at VDD = 2.7V. The output of the PA is an open-drain transistor that requires external impedance matching and pullup inductance for proper biasing. The pullup inductance from PA to VDD serves three main purposes: it resonates the capacitance of the PA output, provides biasing for the PA, and becomes a high-frequency choke to reduce the RF energy coupling into VDD. The recommended output-matching network topology is shown in the Typical Application Circuit. The matching network transforms the 50 load to approximately 125 at the output of the PA in addition to forming a bandpass filter that provides attenuation for the higher order harmonics.
Chip Information
TRANSISTOR COUNT: 2489 PROCESS: CMOS
Output Matching to PC Board Loop Antenna
In some applications, the MAX7044 power amplifier output has to be impedance matched to a small-loop
8 _______________________________________________________________________________________
300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
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).
SOT23, 8L .EPS
REV.
MAX7044
SEE DETAIL "A" b e
C L
SYMBOL A A1 A2 b C D E E1 L L2 e e1
MIN 0.90 0.00 0.90 0.28 0.09 2.80 2.60 1.50 0.30
MAX 1.45 0.15 1.30 0.45 0.20 3.00 3.00 1.75 0.60 0.25 BSC.
C L
E
C L
E1
PIN 1 I.D. DOT (SEE NOTE 6) e1 D C
C L
0
0.65 BSC. 1.95 REF. 0 8
L2 A A2 A1
SEATING PLANE C
GAUGE PLANE
NOTE:
1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. FOOT LENGTH MEASURED FROM LEAD TIP TO UPPER RADIUS OF HEEL OF THE LEAD PARALLEL TO SEATING PLANE C. 3. PACKAGE OUTLINE EXCLUSIVE OF MOLD FLASH & METAL BURR. 4. PACKAGE OUTLINE INCLUSIVE OF SOLDER PLATING. 5. COPLANARITY 4 MILS. MAX. 6. PIN 1 I.D. DOT IS 0.3 MM y MIN. LOCATED ABOVE PIN 1. 7. SOLDER THICKNESS MEASURED AT FLAT SECTION OF LEAD BETWEEN 0.08mm AND 0.15mm FROM LEAD TIP. 8. MEETS JEDEC MO178.
L
0
DETAIL "A"
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, SOT-23, 8L BODY
APPROVAL DOCUMENT CONTROL NO.
21-0078
D
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 _____________________ 9 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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