NXP Semiconductors


Select site:

English

Datasheet

SA639
(Product Specification)
02-Oct-98, 16 pages, 173 kB

Download Datasheet
Download all documentation

SA639 - Low voltage mixer FM IF system with filter amplifier and data switch

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The SA639 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two wideband limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), fast RSSI op amps, voltage regulator, wideband data output, post detection filter amplifier and data switch. The SA639 is available in 24-lead TSSOP (Thin shrink small outline package).

The SA639 was designed for high bandwidth portable communication applications and will function down to 2.7V. The RF section is similar to the famous NE605. The data output provides a minimum bandwidth of 1MHz to demodulate wideband data. The RSSI output is amplified and has access to the feedback pin. This enables the designer to level adjust the outputs or add filtering.

The post-detection amplifier may be used to realize a low pass filter function. A programmable data switch routes a portion of the data signal to an external integration circuit that generates a data comparator reference voltage.

SA639 incorporates a power down mode which powers down the device when Pin 8 is high. Power down logic levels are CMOS and TTL compatible with high input impedance.

Back to top

Features

  • VCC = 2.7 to 5.5V
  • Low power consumption: 8.6mA typ at 3V
  • Wideband data output (1MHz min.)
  • Fast RSSI rise and fall times
  • Mixer input to >500MHz
  • Mixer conversion power gain of 9.2dB and noise figure of 11dB at 110MHz
  • XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local oscillator can be injected)
  • 92dB of IF Amp/Limiter power gain
  • 25MHz limiter small signal bandwidth
  • Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with a dynamic range in excess of 80dB
  • RSSI output internal op amp
  • Post detection amplifier for filtering
  • Programmable data switch
  • Excellent sensitivity: 2.24µV into 50W matching network for 10dB SNR (Signal to Noise Ratio) with RF at 110MHz and IF at 9.8MHz
  • ESD hardened
  • Power down mode


Back to top

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
SA639DH/01SA639DH/01,1129352 752 93112Volume productionSOT355-1
(TSSOP24) 		TubeStandard Marking
SA639DH/01SA639DH/01,1189352 752 93118Volume productionSOT355-1
(TSSOP24) 		Reel Pack, SMD, 13"Standard Marking

Back to top

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
SA639DH/01SA639DH/01,112SA639DH_01
Always Pb-free
SA639DH/01SA639DH/01,118SA639DH_01
Always Pb-free

Quality and reliability disclaimer

Back to top

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
SA639DH/019352 752 93112  SA639DH/01,112  3.0500NAAVNET ELECTRONICS MARKETING1,409 11/19/2009Buy onlinenot available
SA639DH/019352 752 93118  SA639DH/01,118  3.0500NAMOUSER ELECTRONICS186 11/20/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION4,462 11/20/2009Buy online 
    NAMOUSER ELECTRONICS186 11/20/2009Buy online 
Back to top

Applications

  • DECT (Digital European Cordless Telephone)
  • FSK and ASK data receivers


Back to top

Block diagrams/pinning

Back to top

Parametrics/similar products

Type numberPackageApplicationFUNCTIONOperating
temp.(Cel)		VoltageNo. of PinsAmplifier TypeCurrentPowerBandwidth
SA639DH/01SOT355-1
(TSSOP24)		Data CommunicationFM IF systems-40~85Low24Amplifiers w/ SwitchesLowLow25 MHz


Similar products
SA639 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

Back to top