The MAX328/MA329 are monolithic CMOS analog multiplexers. The is a single-ended, 1-of-8 device, and the is a differential, 2-of-8 device. Designed to provide the lowest possible on- and offleakages, these multiplexers switch signals from high source impedance, providing the mux operates into a high-input-impedance op amp or A/D converter. The MAX328/MAX329 are pin-for-pin replacements for the popular DG508/DG509 in these applications. Adding an external 40k resistor to each input makes the MAX328/MAX329 an excellent fault-tolerant multiplexer. Low leakage (less than at +25°C) and 2.5k on-resistance allow the circuit to sustain 110V AC faults indefinitely while maintaining an error of less than 40nV for normal signals (i.e., 1pA times 40k). The MAX328/MAX329 work equally well with a single supply 30V or dual supplies to ±18V. They also perform well with unbalanced combinations of supply voltage, such as +12V and or +5V and -15V. Low power dissipation (1.9mW with ±15V supplies) allows use in portable applications.

o Ultra-Low Off- and On-Leakage: 1pA Typ o Bidirectional Operation (Use as Mux or Demux) o TTL and CMOS Logic Compatibility o Analog Signal Range Includes Power-Supply Rails o Switching Speeds Less Than 1.5µs o Pin Compatible with DG508/DG509 and MAX358/MAX359 o Latchup Proof Construction

PART MAX328EJE MAX328MJE TEMP RANGE to +125°C PIN-PACKAGE 16 Plastic DIP 16 Wide SO 16 CERDIP Dice* 16 QFN 16 Plastic DIP 16 Wide SO 16 CERDIP** 16 CERDIP**

Control Systems Data Logging Systems Aircraft Heads-Up Displays Data-Acquisition Systems Signal Routing

*Contact factory for dice specifications. **Contact factory for availability. Substrate may be allowed to float or be connected to V+. Ordering Information and Pin Configurations continued at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

Voltage Referenced VV+........................................................................................+44V GND.....................................................................................+25V Digital Inputs (Note 1), VS, VD............................-2V to (V+ + 2V) Current (Any Terminal, Except or D)................................30mA Continuous Current, or D (pulsed 1ms, 10% duty cycle max)............................40mA Operating Temperature Range to +125°C Power Dissipation (Package) (Note 1) 16-Pin CERDIP (Note 2)...............................................900mW 16-Pin Plastic DIP (Note 3)...........................................470mW 16-Pin Wide SO (Note 4)..............................................750mW 16-Pin QFN (Note 5)...................................................1538mw Storage to +150°C

All leads soldered or welded to PC board. Derate 12mW/°C above +75°C. Derate 6.3mW/°C above +75°C. Derate 10mW/°C above +75°C. Derate 19.2mW/°C above +75°C.

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

LIMITS PARAMETER SYMBOL TEST CONDITIONS MIN SWITCH Analog Signal Range Drain-Source On-Resistance VANALOG = 100µA Seq. each switch on, VAL = 0.8V, VAH MAX328M MAX329M TYP MAX MAX328C/E MAX329C/E MIN TYP MAX UNITS

Greatest Change in Drain-Source OnResistance Between Channels Source Off-Leakage Current (Note 6) MAX328 Drain OffLeakage Current (Note MAX329 MAX328 Drain OnLeakage Current (Note 6) MAX329

RDS(on) = RDS(ON) Max - RDS(ON) Min ( ) RDS(ON) Ave 10V VS (all) 10V VS (all) -10V VS (all) 10V VS (all) = -10V Seq. each switch on, VAL = 0.8V, VAH = 2.4V VEN = 0V

LIMITS PARAMETER SYMBOL TEST CONDITIONS MIN INPUT Address Input Current, Input Voltage High Address Input Current, Input Voltage Low DYNAMIC Switching Time of Multiplexer Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time Off-Isolation Source Off-Capacitance Drain OffCapacitance MAX328 MAX329 tTRANSITION See Figure 1 tOPEN tON(EN) tOFF(EN) OIRR CS(OFF) CD(OFF) See Figure 2 See Figure 3 See Figure 3 VEN = +10V Charge Injection (Note 8) SUPPLY Positive Supply Current Negative Supply Current Power-Supply Range for Continuous Operation (Note 7) I+ IVOP VEN = 2.4V VEN µA V Q(INJ) = -10V VEN = 1MHz VEN dB pF IAH IAL = 15V VEN = 2.4V VEN = 0V All MAX328M MAX329M TYP MAX MAX328C/E MAX329C/E MIN TYP MAX UNITS

Note 6: All leakage parameters are 100% tested at maximum rated operating temperature, i.e., +85°C, +125°C, and guaranteed by correlation at +25°C. Note 7: Electrical characteristics, such as On-Resistance, change when power supplies other than ±15V are used. Power-supply range is a design characteristic, not production tested. Note 8: Guaranteed by design. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.