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Best Alternatives to BL1551B

Package: SC70-6BLSwitchesOn-Resistance (Typ): 2.7 ΩBandwidth: 350 MHzSupply Voltage Range: 1.8 V to 5.5 VSwitch Configuration: SPDTOperating Temperature: -40 °C to 125 °C

BL1551B is a SC70-6 SPDT analog switch. Alternatives need pinout, bandwidth, Ron, and temperature review.

AI replacement insight

Electrical riskmedium

Ron and bandwidth vary.

Package riskmedium

SC70-6 seen, pinout missing.

Firmware risklow

No protocol logic.

Sourcing riskmedium

Some lifecycle fields weak.

Can it be replaced directly?

No confirmed pin-compatible replacement is proven from the provided fields.

Best replacement path

Review TMUX1219DCKR or TMUX1237DCKR first, then RS2057XC6 if 300MHz is enough.

Main risk

Pinout is not proven for any candidate.

Recommended alternatives

5
TMUX1219DCKR package
TMUX1219DCKR

Texas Instruments

Needs validationmedium risk

TMUX1219DCKR is a close SPDT SC70-6 candidate for BL1551B after pinout review.

View details

Alternative comparison matrix

Feature / factorBL1551BTMUX1219DCKRTMUX1237DCKRRS2057XC6Compatibility / risk
InterfaceSPDTSPDTSPDTSPDTSPDT — same switch role; TMUX1237DCKR: same switch role; RS2057XC6: same function; RS2101XC6: same role
PackageSC70-6SC70-6SC70-6SOT363/SC70-6SC70-6 / SOT363/SC70-6 — same outline; TMUX1237DCKR: same outline; RS2057XC6: same class; RS2101XC6: same class
Voltage1.8-5.5V1.08-5.5V1.08-5.5V1.8-5.5V1.08-5.5V / 1.8-5.5V — wider Vcc; TMUX1237DCKR: wider Vcc; RS2057XC6: same range; RS2101XC6: same range
Temperature-40 to 125C-40 to 125C-40 to 125C--40 to 125C — covers target; TMUX1237DCKR: covers target
Pinout6 pins6 pins6 pins-6 pins — pin map missing; TMUX1237DCKR: pin map missing
Resistance2.7 typ--4.5 typ4.5 typ / 2.4 typ — higher loss; RS2101XC6: lower Ron
Application350MHz--300MHz300MHz / 120MHz — less BW; RS2101XC6: large BW loss

Application & sourcing insights

Questions & answers

TMUX1219DCKR or TMUX1237DCKR look closest, but pinout and bandwidth must be checked.