SGM4157YC6/TR MIAJK CMOS switch for Whatsminer CB2 V8 Control Board
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SGM4157YC6/TR MIAJK SPDT CMOS Switch | Low-On-Resistance Analog Switch for Whatsminer CB2 V8 Control Board Repair
The SGM4157YC6/TR (MIAJK marking) is a high-performance single-pole double-throw (SPDT) CMOS switch with low on-resistance, used on the Whatsminer CB2 V8 control board for signal routing between the controller and the hashboard interface. Drop-in replacement when the original switch fails — restores signal switching and clears the hashboard recognition or communication errors that come with a degraded analog switch.
Identify the part by the MIA silkscreen marking on the CB2 V8 board location — that's the SGM4157YC6/TR. Built in the compact SC70-6 package, the switch is engineered for low-voltage applications with low static power consumption, TTL and CMOS input compatibility, break-before-make switching (prevents signal corruption during transitions), and a -40°C to +85°C operating temperature range.
When to Replace the SGM4157YC6
- Signal routing failure on the CB2 V8 control board — switch dead, downstream signal not reaching the controller.
- Hashboard recognition errors tied to the CB2 V8 signal path — analog switch degraded, signal integrity lost.
- Visible damage on the SC70-6 package — burn marks, lifted pins, surge damage.
- Post-failure rework on the CB2 V8 control board — replace alongside other suspect components during a board-level repair.
- Preventive board refurbishment — refresh signal-path ICs during a complete control board overhaul.
SGM4157YC6/TR MIAJK Specifications
| Feature | Specification |
|---|---|
| Part Number | SGM4157YC6/TR |
| Silkscreen Marking | MIA |
| Switch Type | Analog switch, SPDT |
| Switch Architecture | Single-Pole Double-Throw (SPDT) |
| Channels per Chip | 1 |
| Inputs per Chip | 1 |
| On-Resistance | Low (CMOS technology) |
| Input Compatibility | TTL and CMOS |
| Switching Behaviour | Break-before-make |
| Static Power Consumption | Low |
| Operating Temperature | -40°C to +85°C |
| Package | SC70-6 (SMD) |
| Typical Use | Whatsminer CB2 V8 control board signal routing |
FAQ — SGM4157YC6 CMOS Switch
Q: How do I identify the SGM4157YC6 on the CB2 V8 board?
A: Look for the MIA silkscreen marking on the package. The SC70-6 package is small (~2×2mm), so use magnification. The position is typically near the hashboard signal connector.
Q: What does "break-before-make" mean and why is it important?
A: The switch fully disconnects one input before connecting the other, preventing momentary short-circuits between the two inputs. Critical for signal integrity on shared data lines — without it, transitions can corrupt the signal or damage upstream drivers.
Q: What rework equipment do I need for SC70-6 replacement?
A: SC70-6 is one of the smallest SMD packages — requires hot-air rework with a fine tip and microscope magnification. Standard equipment for any modern hashboard or control board repair bench.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume. Reel and tape quantities are stocked.
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Repair shops stocking SGM4157YC6 switches by the reel? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
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