What this dual SP4T switch does for your signal path
The MAX4639EUE+T from Analog Devices is a dual SP4T (single-pole, four-throw) analog switch — two independent 4:1 multiplexers in a single 16-TSSOP package. Each switch channel carries a maximum on-resistance of 3.5 Ohm, with channel-to-channel matching held to 100 mOhm, so the insertion loss stays uniform across all four inputs. The -3 dB bandwidth of 85 MHz and crosstalk of -85 dB at 1 MHz mean it handles baseband analog signals — audio, low-frequency instrumentation, or control voltages — without bleeding between channels.
Supply rails and logic compatibility
Runs from a single supply between 1.8 V and 5.5 V, or dual supplies at ±2.5 V. The 1.8 V minimum single-supply floor makes it usable in 1.8 V logic systems, while the 5.5 V ceiling covers 3.3 V and 5 V rails. Switching times are fast — 18 ns turn-on, 7 ns turn-off — so it can be used for signal routing in multiplexed data-acquisition front ends without introducing timing skew.
Charge injection and leakage — what they mean for precision
Charge injection is rated at 13 pC, and off-state leakage is 250 pA maximum. For a high-impedance sample-and-hold or a precision ADC input, 13 pC of injected charge translates to a small voltage glitch on the hold capacitor — acceptable for 12-bit systems if the source impedance is kept low. The 250 pA leakage keeps the off-channel from loading the signal bus in multiplexed measurements.
Package and temperature range
Housed in a 16-TSSOP (4.40 mm width) with surface-mount termination. The operating temperature range is -40°C to 85°C, covering industrial and commercial environments — outdoor telecom cabinets, factory-floor data acquisition, or benchtop instrumentation. The part is ROHS3 compliant per the listing.
Lifecycle and sourcing posture
The Tape & Reel suffix (T) means it ships on 7-inch reels, standard for automated pick-and-place.