Two brand new parts, unused engineering samples. From the data sheet:

Features:

● Guaranteed On-Resistance Match Between Channels, < 5Ω Max
● Low On-Resistance, < 100Ω Max
● Guaranteed Flat On-Resistance Over Specified Signal Range, 7Ω Max
● Guaranteed Charge Injection, < 10pC
● INO(OFF) Leakage < 2.5nA at +85°C
● ICOM(OFF) Leakage < 20nA at +85°C
● ESD Protection > 2000V
● Plug-In Upgrade for Industry-Standard DG406/DG407/DG506A/DG507A
● Single-Supply Operation (+5V to +30V) Bipolar-Supply Operation (±4.5V to ±20V)
● Low Power Consumption, < 1.25mW
● Rail-to-Rail Signal Handling

● TTL/CMOS-Logic Compatible

General Description

The MAX306/MAX307 precision, monolithic, CMOS analog multiplexers (muxes) offer low on-resistance (less than 100Ω), which is matched to within 5Ω between channels and remains flat over the specified analog signal range (7Ω, max). They also offer low leakage over temperature (INO(OFF) less than 2.5nA at +85°C) and fast switching speeds (tTRANS less than 250ns). The MAX306 is a single-ended 1-of-16 device, and the MAX307 is a differential 2-of-8 device. The MAX306/MAX307 are fabricated with Maxim’s improved 44V silicon-gate process. Design improvements yield extremely low charge injection (less than 10pC) and guarantee electrostatic discharge (ESD) protection greater than 2000V. These muxes operate with a single +5V to +30V supply, or bipolar ±4.5V to ±20V supplies, while retaining TTL/CMOS-logic input compatibility and fast switching. CMOS inputs provide reduced input loading. These improved parts are plug-in upgrades for the industry standard DG406, DG407, DG506A, and DG507A.

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