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NXP Semiconductors SA58640DK,118
- Part No.:
- SA58640DK,118
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Mixers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SA58640DK,118.pdf
- Description:
- IC MIXER 100MHZ UP CONVRT 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
SA58640DK,118 from NXP Semiconductors is a low-voltage monolithic FM intermediate frequency (IF) system IC integrating mixer/oscillator, dual limiting IF amplifiers, quadrature detector, logarithmic RSSI, voltage regulator, and rail-to-rail audio/RSSI op amps. It operates at 5 V with 5.0 mA typical supply current, delivers 17 dB mixer conversion gain at 45 MHz, and supports RF input up to 100 MHz - designed specifically for analog cordless telephone receivers.
For engineers reviewing the SA58640DK,118 datasheet, SA58640DK,118 pinout, SA58640DK,118 application, or SA58640DK,118 equivalent, this page provides verified circuit role, SSOP20 pin mapping, 102 dB total IF/limiter gain, 70 dB RSSI dynamic range, and validated alternatives for FM IF signal chain replacement in legacy cordless telephony designs.
Technical Context
The SA58640DK,118 implements a second-IF architecture with a Gilbert-cell mixer followed by cascaded IF amplifier (44 dB gain, 5.5 MHz BW) and limiter (58 dB gain, 4.5 MHz BW), optimized for 455 kHz ceramic filter interfaces. Its internal oscillator supports crystal (≤100 MHz) or LC configurations, and the quadrature detector uses AC-coupled tuned network for 90° phase shift.
Signal path includes temperature-compensated logarithmic RSSI with 70 dB range and two rail-to-rail op amps - one for audio output (120 mV typical at 2× gain), one for RSSI output (0.5–2.4 V across −110 to −50 dBm IF input). Input impedance is matched to 1.5 kΩ at IF_AMP_IN and LIM_IN pins to eliminate external matching networks with standard 455 kHz filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–6.0 V - compatible with single-cell Li-ion or regulated 5 V rails; absolute max 7 V. |
| Supply Current | 5.0 mA typical at 5 V - enables battery-operated cordless handsets with extended talk time. |
| Mixer Conversion Gain | 17 dB at 45 MHz - ensures high sensitivity without external IF gain stages. |
| IF Amplifier + Limiter Gain | 102 dB total - achieves robust demodulation of weak FM signals in noisy environments. |
| RSSI Dynamic Range | 70 dB - provides accurate received signal strength indication across full operating range. |
| IF Small-Signal Bandwidth | 2 MHz - supports wideband FM modulation (±5 kHz deviation) with low distortion. |
| Noise Figure | 7.0 dB at 45 MHz - maintains high SINAD (>12 dB system) down to −114 dBm RF sensitivity. |
Pinout & Package
SA58640DK,118 is housed in a plastic shrink small outline package (SSOP20) with 20 leads, 4.4 mm body width, and 0.65 mm lead pitch per SOT266-1 specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RF_IN_P | Positive RF mixer input | Differential RF port; accepts 45–100 MHz signals with 8 kΩ input resistance. |
| 2 RF_IN_N_DEC | Negative RF mixer input, decoupling | DC return path and RF decoupling node for balanced mixer operation. |
| 3 OSCOUT | Oscillator output (emitter) | Drives external LC tank or crystal; supports >100 MHz Hartley/Colpitts configurations. |
| 4 OSCIN | Oscillator input (base) | Feedback node for internal transistor oscillator; requires external tank components. |
| 5 RSSI_OUT | RSSI amplifier output | Rail-to-rail op amp output delivering 0.5–2.4 V proportional to IF level (−110 to −50 dBm). |
| 6 VCC | Positive supply | Main power pin; requires local 0.1 μF bypass and bulk 10–15 μF tantalum capacitor. |
| 7 AUDIO_FB | Audio amplifier negative input, feedback | Configures audio op amp gain/filtering; supports unity gain buffer or 2× de-emphasis. |
| 8 AUDIO_OUT | Audio amplifier output | Rail-to-rail output driving ≥10 kΩ AC load; 120 mV RMS typical with C-message weighting. |
| 9 RSSI_FB | RSSI amplifier negative input, feedback | Enables second-order temperature compensation and gain adjustment of RSSI output. |
| 10 QUAD_IN | Quadrature detector input | AC-coupled IF signal input to multiplier cell; forms 90° phase relationship with internal IF. |
| 11 LIM_OUT | Limiter amplifier output | Drives quadrature detector; 130 mV RMS typical output into 1.5 kΩ load. |
| 12,13 LIM_DEC | Limiter decoupling | Dual decoupling terminals for limiter stage stability; connect to ground via low-ESR capacitors. |
| 14 LIM_IN | Limiter amplifier input | 1.5 kΩ input impedance matches ceramic filter outputs; no external matching required. |
| 15 GND | Ground | Common reference for all analog and RF sections; must be low-inductance plane. |
| 16 IF_AMP_OUT | IF amplifier output | Drives limiter input; 1.5 kΩ output impedance interfaces directly with LIM_IN. |
| 17,19 IF_AMP_DEC | IF amplifier decoupling | Two dedicated decoupling pins for IF amplifier stability; connect to ground near VCC. |
| 18 IF_AMP_IN | IF amplifier input | 1.5 kΩ input impedance; accepts output from 455 kHz ceramic or crystal filters directly. |
| 20 MIXER_OUT | Mixer output | 1.5 kΩ output impedance; connects directly to 455 kHz filter without series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FM IF signal chain | Combines mixer, oscillator, dual IF/limiter, quadrature detector, RSSI, and dual op amps in one SSOP20 IC - eliminates 12+ discrete components in cordless phone receivers. |
| Rail-to-rail audio and RSSI op amps | Enables full-scale output swing from 0 V to VCC, supporting direct interface to ADCs or analog volume control without level-shifting. |
| Temperature-compensated logarithmic RSSI | Delivers stable 70 dB dynamic range across −40 °C to +85 °C ambient, critical for consistent signal-strength reporting in varying environments. |
| 1.5 kΩ IF/limiter input/output impedance | Matches standard 455 kHz ceramic filters (e.g., Murata CFUCF455KB4X-R0) without external matching networks - reduces BOM count and layout complexity. |
| ESD protection | 2 kV HBM / 200 V machine model - meets industrial handling requirements without additional protection circuitry. |
Applications
| DECT Cordless Handset Receiver | Analog 900 MHz Cordless Base Station |
|---|---|
|
Use Scenario: Receives 45 MHz IF signal from front-end mixer in DECT-compatible handset, processes FM-demodulated voice and RSSI for channel selection and battery management. IC Role / Device Role / Timing Role: Primary IF signal processor - performs limiting, quadrature detection, audio amplification, and RSSI generation in single-chip solution. Use Value: Reduces component count by >30% versus discrete IF chain; enables compact PCB layout with 2 MHz bandwidth supporting 30 kHz ceramic filters. |
Use Scenario: Processes 455 kHz IF output from superheterodyne front-end in analog 900 MHz base station, delivering clean audio and calibrated RSSI for call quality monitoring. IC Role / Device Role / Timing Role: Dual-function IF subsystem - handles both audio path (C-message weighted, de-emphasis filtered) and RSSI path (temperature compensated, 70 dB range). Use Value: Achieves 12 dB SINAD at −114 dBm RF sensitivity; rail-to-rail op amps drive analog line drivers directly without level-shifting components. |
| FM Wireless Intercom System | Legacy Analog Cordless Telephone Set |
|
Use Scenario: Used in short-range FM intercom units operating at 49 MHz ISM band, where low-power consumption and high adjacent-channel rejection are essential. IC Role / Device Role / Timing Role: Complete IF receiver core - integrates oscillator, IF amplification, limiting, quadrature detection, and dual op amps in one device. Use Value: 50 dB AM rejection suppresses interference from nearby AM broadcast; 102 dB total gain enables use with low-Q ceramic filters and minimal external tuning. |
Use Scenario: Core IF processor in 1990s-era analog cordless phones (e.g., CT0/CT1 standards), replacing multi-stage discrete designs with single IC. IC Role / Device Role / Timing Role: Monolithic FM IF system - replaces separate mixer, IF amps, limiter, detector, and op amps with integrated solution. Use Value: Eliminates manual alignment; 17 dB mixer gain and 2 MHz bandwidth support ±5 kHz FM deviation with <−55 dB THD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FM IF system applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SA58641DK,118 | Same die, identical pinout and electrical specs; differs only in oscillator configuration - supports external LO instead of internal crystal/LC oscillator. | Used when system-level clock source is shared across multiple receivers; requires external 45 MHz LO driver instead of on-chip oscillator. | Select SA58641DK,118 only if external LO synchronization is required; otherwise SA58640DK,118 provides lower BOM cost and simpler layout. |
| MC3359P | Discrete bipolar IF system; 16-pin DIP; requires external oscillator, IF transformers, and op amps; no integrated RSSI or rail-to-rail outputs. | Legacy design requiring manual alignment and higher component count; lacks temperature-compensated RSSI and modern op amp features. | Choose MC3359P only for exact form-fit replacement in obsolete DIP-based designs; SA58640DK,118 offers superior integration, lower power, and smaller footprint. |
Compared with SA58641DK,118 and MC3359P, the SA58640DK,118 delivers highest integration density and lowest external component count for self-contained FM IF receivers, while maintaining pin compatibility with its SA58641DK,118 variant for flexible LO architecture selection.
Availability
SA58640DK,118 is available at Aetrix Electronics and suitable for analog cordless telephone receivers, FM wireless intercom systems, and legacy 900 MHz base stations requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SA58640DK,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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The SA58640DK,118 belongs to NXP's legacy analog radio receiver product line, engineered specifically for cost-sensitive, battery-powered cordless telephony systems requiring high integration and minimal external components.
FAQ
What is the maximum RF input frequency supported by the SA58640DK,118?
The SA58640DK,118 supports RF input frequencies up to 100 MHz, as confirmed by its mixer input specification and oscillator capability. This allows use in 45 MHz, 49 MHz, and 900 MHz cordless telephone bands with appropriate front-end filtering and local oscillator configuration. The SA58640DK,118 datasheet specifies 100 MHz as the upper limit for both RF input and oscillator frequency under standard operating conditions.
Does the SA58640DK,118 require external IF filter matching components?
No, the SA58640DK,118 does not require external IF filter matching components. Its IF amplifier and limiter inputs have a nominal 1.5 kΩ impedance that matches standard 455 kHz ceramic filters (e.g., Murata CFUCF455KB4X-R0) directly. The SA58640DK,118 datasheet explicitly states "no impedance matching network is necessary" for most 455 kHz filters, reducing BOM count and simplifying layout.
What is the typical supply current of the SA58640DK,118 at 5 V?
The SA58640DK,118 draws 5.0 mA typical supply current at 5 V, as specified in Table 4 (Static Characteristics) of the official NXP datasheet. This low quiescent current enables extended battery life in portable cordless handsets. Measured values remain within 5.0–6.0 mA across −40 °C to +85 °C ambient temperature per Figure 3 in the SA58640DK,118 datasheet.
Can the SA58640DK,118 operate with a 3.3 V supply?
No, the SA58640DK,118 is not rated for 3.3 V operation. Its specified supply voltage range is 4.5–6.0 V, with an absolute maximum of 7 V. Operation below 4.5 V may result in degraded performance including reduced gain, increased noise figure, and unstable oscillator operation. The SA58640DK,118 datasheet defines 4.5 V as the minimum recommended supply voltage for guaranteed functionality.
What type of oscillator configuration does the SA58640DK,118 support?
The SA58640DK,118 supports crystal oscillator configurations up to 100 MHz using Hartley or Colpitts topologies, as well as LC tank oscillators for higher-frequency applications. It does not support external LO injection - that function is implemented in the pin-compatible SA58641DK,118 variant. The SA58640DK,118 oscillator section is fully integrated with dedicated OSCIN and OSCOUT pins for external tank component connection.
SA58640DK,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- SA58640
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- Cordless Phones
- Frequency:
- 100MHz
- Number of Mixers:
- 2
- Gain:
- 17dB
- Noise Figure:
- 7dB
- Secondary Attributes:
- Up Converter
- Current - Supply:
- 6mA
- Voltage - Supply:
- 4.5V ~ 6V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SA58640DK,118 FAQ
1.How can I place an order for SA58640DK,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA58640DK,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 SA58640DK,118 reliable?
The price and inventory of SA58640DK,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA58640DK,118 is usually 5 days.
3.What payment methods are accepted for SA58640DK,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA58640DK,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA58640DK,118?
SA58640DK,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA58640DK,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 SA58640DK,118?
For technical support, including SA58640DK,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA58640DK,118 requirements.
6.How does Aetrix verify that SA58640DK,118 is sourced from the original manufacturer or authorized distributors?
All SA58640DK,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 SA58640DK,118 meets industry standards.
7.What is the process for return or replacement of SA58640DK,118?
All SA58640DK,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA58640DK,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 SA58640DK,118 part is unused and in its original packaging.
Return procedure for SA58640DK,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA58640DK,118 Tags
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MAX2671EUT+T
Analog Devices Inc./Maxim Integrated
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ADEX-10+
Mini-Circuits
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ADE-2+
Mini-Circuits
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ADE-1+
Mini-Circuits
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LT5560EDD#PBF
Analog Devices Inc.
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LT5560EDD#TRPBF
Analog Devices Inc.
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LTC5562IUC#TRPBF
Analog Devices Inc.
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MAX2681EUT+T
Analog Devices Inc./Maxim Integrated
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ADE-1ASK+
Mini-Circuits
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ADE-1L+
Mini-Circuits
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ADL5350ACPZ-R7
Analog Devices Inc.
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AD608ARZ-RL
Analog Devices Inc.
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