8-Channel/Dual 4-Channel, Low-Leakage, CMOS Analog Multiplexers

The MAX338/MAX339 are monolithic, CMOS analog multiplexers (muxes). The 8-channel MAX338 is designed to connect one of eight inputs to a common output by control of a 3-bit binary address. The dual, 4-channel MAX339 is designed to connect one of four inputs to a common output by control of a 2-bit binary address. Both devices can be used as either a mux or a demux. On-resistance is 400Ω max, and the devices conduct current equally well in both directions.

These muxes feature extremely low off leakages (less than 20pA at +25°C), and extremely low on-channel leakages (less than 50pA at +25°C). The new design offers guaranteed low charge injection (1.5pC typ) and electrostatic discharge (ESD) protection greater than 2000V, per method 3015.7. These improved muxes are pin-compatible upgrades for the industry-standard DG508A and DG509A. For similar Maxim devices with lower leakage and charge injection but higher on-resistance, see the MAX328 and MAX329.

The MAX338/MAX339 operate from a single +4.5V to +30V supply or from dual supplies of ±4.5V to ±20V. All control inputs (whether address or enable) are TTL compatible (+0.8V to +2.4V) over the full specified temperature range and over the ±4.5V to ±18V supply range. These parts are fabricated with Maxim's 44V silicon-gate process.

Applications

* Communication Systems * Data Acquisition Systems * Guidance and Control Systems * Heads-Up Displays * Military Radios * PBX, PABX * Sample-and-Hold Circuits * Test Equipment

* On-Resistance, < 400Ω max

* Transition Time, < 500ns

* On-Resistance Match, < 10Ω

* NO-Off Leakage Current, < 20pA at +25°C

* 1.5pC Charge Injection

* Single-Supply Operation (+4.5V to +30V) Bipolar-Supply Operation (±4.5V to ±20V)

* Plug-In Upgrade for Industry-Standard DG508A/DG509A

* Rail-to-Rail Signal Handling

* TTL/CMOS-Logic Compatible

* ESD Protection > 2000V, per Method 3015.7