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NXP Semiconductors SA636DK/01,118
- Part No.:
- SA636DK/01,118
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Mixers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SA636DK/01,118.pdf
- Description:
- IC MIXER 500MHZ RSSI 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,058
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Product details
Overview
SA636DK/01,118 from NXP Semiconductors is a low-voltage (2.7–5.5 V) monolithic FM IF system integrating mixer/oscillator, dual limiting IF amplifiers, quadrature detector, temperature-compensated logarithmic RSSI (90 dB dynamic range), wideband data output (≥600 kHz), and power-down control. It operates at 10.7 MHz IF with 330 Ω impedance matching and targets portable high-performance FM receivers such as DECT handsets.
For engineers reviewing the SA636DK/01,118 datasheet, SA636DK/01,118 pinout, SA636DK/01,118 application, or SA636DK/01,118 equivalent, key selection criteria include RSSI output voltage at −118 dBm IF (0.2–0.5 V), mixer conversion gain (11 dB typ. at 240 MHz), low supply current (6.5 mA typ. at 3 V), and SSOP20 package compatibility with 10.7 MHz ceramic filters.
Technical Context
The SA636DK/01,118 implements a single-conversion architecture with a Gilbert-cell mixer (NF = 12 dB, IP3i = −16 dBm at 240 MHz) and internal oscillator supporting crystal (≤150 MHz) or LC (≤1 GHz) configurations. Its IF chain delivers 92 dB total gain across two stages optimized for 330 Ω source/load impedance.
Signal path includes AC-coupled quadrature detection with rail-to-rail op-amp buffered DATA_OUT and RSSI_OUT, where RSSI_FEEDBACK enables external gain adjustment or filtering. Power-down mode reduces ICC to 0.2 mA via CMOS/TTL-compatible POWER_DOWN_CTRL pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - enables direct battery operation in portable devices without LDO regulation |
| Supply Current | 6.5 mA typical at 3 V - supports >100-hour runtime on coin-cell or single Li-ion cells |
| Mixer Conversion Gain | 11 dB typical at 240 MHz - ensures sufficient signal level after RF-to-IF downconversion |
| RSSI Dynamic Range | >90 dB - provides precise signal strength measurement across weak to strong RF conditions |
| Data Output Bandwidth | ≥600 kHz - supports wideband FSK/ASK demodulation for DECT and wireless LAN protocols |
| IF Input Impedance | 330 Ω - allows direct connection to standard 10.7 MHz ceramic or crystal filters without matching networks |
| Power-Down Current | 0.2 mA typical - extends standby time in intermittent-reception applications like cordless telephony |
Pinout & Package
SA636DK/01,118 is housed in a plastic shrink small outline package (SSOP20), SOT266-1, with 20 leads, 0.65 mm pitch, and 4.4 mm body width. Thermal performance is characterized by Zth(j-a) = 117 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IN (Pin 1) | Single-ended RF input | Accepts up to 500 MHz RF signals; 700 Ω input resistance simplifies matching to antenna or LNA |
| POWER_DOWN_CTRL (Pin 8) | Digital enable input | Active-HIGH TTL/CMOS logic controls full device shutdown; input leakage <±10 µA |
| RSSI_FEEDBACK (Pin 6) | Negative feedback node | Allows external resistor network to set RSSI gain or add low-pass filtering for noise reduction |
| DATA_OUT (Pin 9) | Demodulated baseband output | Voltage-mode output with ≥600 kHz bandwidth; drives 100 kΩ loads directly |
| QUADRATURE_IN (Pin 10) | Quadrature phase input | Receives externally generated 90°-shifted IF signal for coherent FM demodulation |
Key Features
| Feature | Design Value |
|---|---|
| Wideband data output | ≥600 kHz minimum bandwidth enables reliable DECT and FSK data demodulation without external amplification |
| Temperature-compensated RSSI | ±1.5 dB RSSI variation over −40 °C to +85 °C ensures stable signal-strength reporting in outdoor or automotive environments |
| Rail-to-rail RSSI op amp | Internal amplifier supports full 0–3 V swing at RSSI_OUT, eliminating need for level-shifting in 3 V systems |
| Low external component count | 330 Ω IF impedance and integrated decoupling pins reduce BOM to <10 passive components for basic 10.7 MHz filter interface |
| High-speed RSSI response | 1.1–1.2 µs rise time and 2.0–7.3 µs fall time allow accurate tracking of fast-varying RF signal envelopes |
Applications
| Digital European Cordless Telephone (DECT) | Wireless Local Area Networks (WLAN) |
|---|---|
Use Scenario: 110.592 MHz RF reception with 9.8 MHz IF in DECT handsets using FSK modulation at 100 kHz deviation. IC Role / Device Role / Timing Role: Single-conversion IF processor performing mixing, limiting, quadrature detection, and RSSI generation. Use Value: Enables compact, low-power handset design with 13 dB conversion gain and 700 kHz data bandwidth meeting ETSI TS 101 376-1 compliance. | Use Scenario: High-sensitivity 2.4 GHz band receiver front-end using external LO injection and 10.7 MHz IF filtering. IC Role / Device Role / Timing Role: IF subsystem providing FM demodulation, RSSI monitoring, and wideband data recovery for legacy WLAN protocols. Use Value: Delivers 12 dB noise figure and −15 dBm IIP3 at 110 MHz, supporting robust link budget in interference-prone 2.4 GHz ISM band. |
| Portable Communications Receivers | FSK/ASK Data Receivers |
Use Scenario: Battery-powered handheld scanner or amateur radio receiver covering VHF/UHF bands with crystal or LC local oscillators. IC Role / Device Role / Timing Role: Complete IF signal chain including mixer, limiter, detector, and RSSI - replaces discrete multi-stage designs. Use Value: Reduces PCB area by >40% versus discrete solutions while maintaining 92 dB IF gain and 25 MHz limiter bandwidth. | Use Scenario: Industrial telemetry module receiving ASK/FSK-modulated sensor data at 1–500 kHz symbol rates. IC Role / Device Role / Timing Role: Baseband demodulator generating clean digital output from analog IF signal with minimal external circuitry. Use Value: DATA_OUT delivers TTL-compatible waveform with 600 kHz bandwidth and <1.2 µs rise time, enabling direct MCU GPIO sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FM IF processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SA636BS,115 | HVQFN20 package (4×4×0.85 mm); lower thermal impedance (40 K/W vs. 117 K/W); identical electrical specs | Better thermal performance for high-duty-cycle or high-ambient-temperature deployments | Select SA636BS,115 when board space is constrained and thermal dissipation is critical |
| SA636DK/02J | RSSI output voltage screened to 0.15–0.45 V at −118 dBm IF (vs. 0.2–0.5 V for SA636DK/01,118) | Optimized for applications requiring tighter RSSI calibration at low signal levels | Select SA636DK/02J when RSSI linearity near noise floor is prioritized over full dynamic range |
Compared with SA636DK/01,118, SA636BS,115 offers superior thermal management in dense layouts, while SA636DK/02J trades extended RSSI voltage range for improved low-level accuracy-neither is pin-compatible due to differing packages and screening, but all share identical functional architecture and 20-pin interface mapping.
Availability
SA636DK/01,118 is available at Aetrix Electronics and suitable for Digital European Cordless Telephone (DECT), portable high-performance communications receivers, and FSK/ASK data receivers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SA636DK/01,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company founded by Philips, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The SA636 product line was designed specifically for low-voltage, high-bandwidth portable FM communication systems - emphasizing integration, RSSI accuracy, and minimal external component count in battery-operated handsets and receivers.
FAQ
What is the RSSI output voltage range of SA636DK/01,118 at −118 dBm IF input level?
The SA636DK/01,118 delivers an RSSI output voltage of 0.2 V to 0.5 V when the IF input level is −118 dBm, as specified in Table 8 of the NXP datasheet Rev. 8. This range reflects factory characterization across process and temperature; actual values depend on layout and decoupling. The SA636DK/01,118 does not have tightened screening like the SA636DK/02 variant.
Does SA636DK/01,118 support internal oscillator operation, or is external LO injection required?
The SA636DK/01,118 supports both internal and external oscillator configurations. Its integrated oscillator accepts crystal (up to 150 MHz) or LC tank (up to 1 GHz) connections via OSC_IN/OSC_OUT pins. External LO injection is optional and used when higher frequency stability or custom tuning is needed - the SA636DK/01,118 functions fully with either method.
What is the recommended IF filter impedance for SA636DK/01,118, and why?
The SA636DK/01,118 is optimized for 330 Ω IF filter impedance, matching its IF amplifier input/output and limiter impedances. Using a 330 Ω ceramic or crystal filter (e.g., Murata SFE10.7MA5-A) eliminates the need for external matching networks, reducing component count and insertion loss - a key design advantage confirmed in Application Note Figure 15 and Table 9.
Can SA636DK/01,118 operate from a 2.7 V supply, and what is its typical current draw at that voltage?
Yes, SA636DK/01,118 is fully specified to operate from 2.7 V to 5.5 V. At 2.7 V and Tamb = 25 °C, its typical supply current is 5.5 mA (Table 7), rising to 6.5 mA at 3 V. This low-voltage capability enables direct use with single-cell Li-ion or NiMH batteries without intermediate regulation, preserving system efficiency.
How does the POWER_DOWN_CTRL pin function, and what logic levels activate power-down mode?
The POWER_DOWN_CTRL pin on SA636DK/01,118 is active-HIGH: applying a logic HIGH (≥0.7 × VCC) enables normal operation, while a logic LOW (≤0.3 × VCC) places the device in power-down mode, reducing supply current to 0.2 mA typical. The pin has CMOS/TTL-compatible thresholds and input leakage under ±10 µA, allowing direct interfacing with microcontrollers or logic gates without level shifting.
SA636DK/01,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- SA636
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- Cellular, ASK, DECT, FSK, UHF, VHF
- Frequency:
- 500MHz
- Number of Mixers:
- 1
- Gain:
- 11dB
- Noise Figure:
- 12dB
- Secondary Attributes:
- RSSI Equipped
- Current - Supply:
- 6.5mA
- Voltage - Supply:
- 2.7V ~ 5.5V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SA636DK/01,118 FAQ
1.How can I place an order for SA636DK/01,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA636DK/01,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SA636DK/01,118 reliable?
The price and inventory of SA636DK/01,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA636DK/01,118 is usually 5 days.
3.What payment methods are accepted for SA636DK/01,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA636DK/01,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA636DK/01,118?
SA636DK/01,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA636DK/01,118 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SA636DK/01,118?
For technical support, including SA636DK/01,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA636DK/01,118 requirements.
6.How does Aetrix verify that SA636DK/01,118 is sourced from the original manufacturer or authorized distributors?
All SA636DK/01,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SA636DK/01,118 meets industry standards.
7.What is the process for return or replacement of SA636DK/01,118?
All SA636DK/01,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA636DK/01,118, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SA636DK/01,118 part is unused and in its original packaging.
Return procedure for SA636DK/01,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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