General Description

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.

Features

♦ 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

Applications

Data-Acquisition Systems

Sample-and-Hold Circuits

Test Equipment

Heads-Up Displays

Military Radios

Communications Systems

Guidance and Control Systems

PBX, PABX