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.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| SA639DH/01 | SA639DH/01,112 | 9352 752 93112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | |
| SA639DH/01 | SA639DH/01,118 | 9352 752 93118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| SA639DH/01 | SA639DH/01,112 | SA639DH_01 |
| Always Pb-free | ||||
| SA639DH/01 | SA639DH/01,118 | SA639DH_01 |
| Always Pb-free |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| SA639DH/01 | 9352 752 93112 | SA639DH/01,112 | 3.0500 | NA | AVNET ELECTRONICS MARKETING | 1,409 | 11/19/2009 | Buy online | not available | |
| SA639DH/01 | 9352 752 93118 | SA639DH/01,118 | 3.0500 | NA | MOUSER ELECTRONICS | 186 | 11/20/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 4,462 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 186 | 11/20/2009 | Buy online |
Application Notes
| Type number | Package | Application | FUNCTION | Operating temp.(Cel) | Voltage | No. of Pins | Amplifier Type | Current | Power | Bandwidth |
|---|---|---|---|---|---|---|---|---|---|---|
| SA639DH/01 | SOT355-1
(TSSOP24) | Data Communication | FM IF systems | -40~85 | Low | 24 | Amplifiers w/ Switches | Low | Low | 25 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.