Antenna Switch Module Selection: 0 of 0 Modules, 0 of 9 Switches Name a Supply Voltage

Antenna switch module selection against Walsin’s own data has nothing to select from: the antenna switch module export returns zero rows.

The plain antenna switch file holds 9 real parts, and across all 12 columns and all 9 rows, not one states a DC supply voltage — the one thing a semiconductor switch cannot operate without, and the one thing no passive-component export is built to carry.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, holds Walsin Technology (Walsin)’s whole RF parametric data folder, including Walsin_Antenna_Switch.xlsx, its folder twin FRESH_rf_asw.xlsx, and Walsin_Antenna_Switch_Module.xlsx, which has no FRESH twin at all. We opened all three files and counted every row. Every part number below is real and came out of Walsin_Antenna_Switch.xlsx. We hold no RF datasheet of any kind, so every figure below is the export’s own value, stated as such.

How many antenna switch module part numbers does Walsin publish?

Zero. We opened Walsin_Antenna_Switch_Module.xlsx directly and it returns zero rows — the 12-column schema is there, headed Part Number, Series, Controller, Application, Type, Function, Size, Frequency, Power(dBm), Insertion Loss(dB), Isolation(dB) and Pin Description, but no data sits under any of them. The category exists in Walsin’s own file structure; the parametric data does not. The plain antenna switch file, one level up from a module, is populated: 9 real rows in Walsin_Antenna_Switch.xlsx, identical row for row to its folder twin FRESH_rf_asw.xlsx.

File	Rows	What it covers
Walsin_Antenna_Switch.xlsx	9	Single switch die: GPIO or MIPI controlled, SPDT to DP12T
Walsin_Antenna_Switch_Module.xlsx	0	A module — typically a switch die plus matching or filtering integrated on one substrate

An antenna switch module selection, strictly read, cannot be made from this data folder at all. What follows is what the plain switch file does and does not support instead.

What does Walsin’s antenna switch file actually publish, across its 9 real parts?

Four of six fields a semiconductor switch decision needs, cleanly; two, not at all. We checked population across all 12 columns on all 9 rows against the fields a switch selection actually requires: port and throw count, frequency, insertion loss, isolation, control logic and supply voltage.

Field a switch selection needs	Column in Walsin_Antenna_Switch.xlsx	Populated	Usable as published?
Port / throw configuration	Function (SPDT to DP12T) + Type (TRx / Rx)	9 / 9	Yes
Frequency range	Frequency	9 / 9	Yes
Insertion loss	Insertion Loss(dB)	9 / 9	Yes, a single maximum figure
Isolation vs frequency	Isolation(dB)	9 / 9	Partly — free text, 3 to 6 lines per part, no fixed number of sub-bands
Control logic	Controller	9 / 9	Partly — names the bus (GPIO Switch or MIPI Switch) only, never a truth table or a pin map
DC supply voltage	No column exists	0 / 9	No

Power handling, in dBm, is also published on every row — 32 to 39 dBm — but that is RF input power the switch can pass, not the DC voltage it needs to operate. A reader who assumes Power(dBm) is the supply rail is reading an RF rating as a DC one; the two are not the same field and the file does not carry the second.

We checked the three SPDT rows against a stated requirement — 100 to 6000 MHz, 1.0 dB insertion loss or better, 34 dBm power handling or better — the shape a GPIO-controlled transmit and receive switch for a multi-band handset front end would need.

Part number	Frequency	Power	Insertion loss	Match / mismatch vs the stated requirement
RFASWA630PTF0E	100–6000 MHz	39 dBm	0.75 dB max	Match on every published field
RFASWA630PTF0G	100–6000 MHz	34 dBm	1.10 dB max	Mismatch — meets the power floor exactly but exceeds the loss ceiling
RFASWA758BTF0E	100–7200 MHz	33 dBm	0.75 dB max	Mismatch — power handling 1 dBm under the stated floor, despite the widest frequency span of the three

All three share the SPDT function and a 6-pin package, yet only one clears every published field. None of the three states the fourth thing the requirement actually depends on — the supply voltage the GPIO control line switches against — so even the match is provisional until that figure comes from Walsin directly.

Does the export name a supply voltage for any of the 9 switches?

No. Not one of the 9 rows, and no column in the 12-column schema is built to hold one. We checked every one of the 108 cells in the file (9 rows by 12 columns) for anything resembling a voltage figure, and found none. A balun, a filter or an MLCC is a passive part with no supply pin to document; an antenna switch is an active die that cannot switch state without a bias voltage, and that single fact is the clearest sign that Walsin’s RF parametric schema was built for the passive side of the RF line and extended, not redesigned, to cover the one active part in it.

Does the export name a control logic truth table, or just the bus type?

Just the bus type. We read the Controller column on all 9 rows: 8 say GPIO Switch, 1 says MIPI Switch. Neither tells you which GPIO line maps to which RF path, what logic level selects which throw, or what the MIPI RFFE register address is. That is the difference between naming an interface and documenting a control scheme — the file does the first and not the second.

Controller	Rows	What the field confirms	What it does not confirm
GPIO Switch	8	The switch is addressed by parallel GPIO lines	Which line, which logic level, how many lines
MIPI Switch	1	The switch is addressed over the MIPI RFFE serial bus	Register map, slave address, command set

Can the package pin count tell you how many pins are left for power and control?

Partly, and the one place it should be simplest is where it breaks. We subtracted the RF signal pins a given throw count implies — one common plus N throw pins for a single-pole switch, two commons plus twice the throw count for a dual-pole switch — from each part’s published pin count, to see whether the remainder was consistent with a supply pin, a ground pin and the GPIO or MIPI lines the control scheme needs.

Part number	Function	Package pins	RF signal pins implied	Remaining pins
RFASWA630PTF0E	SPDT	6	3	3
RFASWA630PTF0G	SPDT	6	3	3
RFASWA758BTF0E	SPDT	6	3	3
RFASWB022ATF0E	DPDT	10	6	4
RFASWK626PTF0E	SP4T	9	5	4
RFASWK414PTF0G	SP4T	14	5	9
RFASWH416PTF0G	SP6T	14	7	7
RFASWD418PTF0G	SP8T	14	9	5
RFASWR681CTF0G	DP12T	18	14	4

All three SPDT parts leave exactly 3 pins — plausibly supply, ground and one GPIO control bit — which is a consistent pattern. It breaks on the two SP4T parts: RFASWK626PTF0E leaves 4 spare pins in a 9-pin package, while RFASWK414PTF0G, the identical function, leaves 9 spare pins in a 14-pin package. We have not seen this counted anywhere. Pin-count arithmetic alone cannot reconstruct a control and supply scheme the export does not name, and this is the proof: two parts with the same throw count and the same control need differ by 5 pins for a reason the file does not state.

What does Venatech hold on Walsin antenna switches and switch modules?

Nothing. We hold 28 Walsin datasheets, 451 pages, covering 26 MLCC series and 2 chip resistor series. We checked all 28 filenames against the RF line: none covers an antenna switch, a switch module, a balun, a coupler or a multiplexer. Supply voltage, ESD rating, switching or settling time and the actual GPIO-to-port truth table — everything a semiconductor qualification needs beyond what is listed above — sits entirely outside our documentation and outside the parametric export both.

What should a buyer do before specifying a Walsin antenna switch?

Treat the 9-row switch file as a shortlist tool, not a qualification source, and ask for the datasheet before a bias network is designed around any part in it.

1. Fix the throw count and frequency range first — those two fields are published cleanly on all 9 rows and narrow the shortlist fastest.
2. Do not infer a supply voltage from Power(dBm). That field is RF power handling. The DC bias voltage is not in this export at all and has to come from Walsin directly.
3. Request the GPIO or MIPI control map before board layout, not after. The Controller field names the bus; it does not name which pin does what.
4. Cross whatever else is on your BOM at the free cross-reference tool — paste up to 500 part numbers or drop an Excel or CSV, matched against 800,000+ crossable Walsin part numbers and decoding 18 manufacturers’ part numbers. We will not tell you a part is equivalent; we will show you where it differs.
5. Check what is physically in Hong Kong on ready stock, a dated snapshot as at 23 September 2026, before committing a production slot to any one of the 9.

For the companion RF posts, see The Walsin RF front end: switches, BAW, SAW and multiplexers and Choosing a 2.4 GHz chip antenna. The full line is on the Walsin RF products page.

The short version

Walsin’s antenna switch module export returns zero rows — there is nothing to select from under that name. The plain antenna switch file is populated, 9 real parts, and publishes throw count, frequency, insertion loss and isolation cleanly, but no column anywhere states a DC supply voltage, and the Controller field names a control bus without a logic map. Subtracting implied RF pins from the published pin count holds together for three SPDT parts and breaks for two identical-function SP4T parts five pins apart. We have not seen that counted anywhere else.

Send us your antenna switch or module shortlist with the throw count, frequency and application, and we will tell you plainly what Walsin’s export does and does not cover — including the supply voltage and control map we cannot give you from the data alone. Qualification stays with you.

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Frequently asked questions

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