| Parameters | 
                                                                                                            
                                            | Mount | Surface Mount | 
                                                                            
                                            | Mounting Type | Surface Mount | 
                                                                            
                                            | Package / Case | 8-WDFN Exposed Pad | 
                                                                            
                                            | Number of Pins | 8 | 
                                                                            
                                            | Operating Temperature | -40°C~85°C TA | 
                                                                            
                                            | Packaging | Tape & Reel (TR) | 
                                                                            
                                            | Published | 2002 | 
                                                                            
                                            | Part Status | Obsolete | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 1  (Unlimited) | 
                                                                            
                                            | Resistance | 4Ohm | 
                                                                            
                                            | Max Power Dissipation | 362mW | 
                                                                            
                                            | Base Part Number | MAX4643 | 
                                                                            
                                            | Number of Circuits | 2 | 
                                                                            
                                            | Max Supply Voltage | 5.5V | 
                                                                            
                                            | Min Supply Voltage | 1.8V | 
                                                                            
                                            | Operating Supply Current | 1nA | 
                                                                            
                                            | Nominal Supply Current | 1μA | 
                                                                            
                                            | Throw Configuration | SPST | 
                                                                            
                                            | Turn On Delay Time | 10 ns | 
                                                                            
                                            | Supply Type | Single | 
                                                                            
                                            | Turn-Off Delay Time | 20 ns | 
                                                                            
                                            | On-State Resistance (Max) | 4Ohm | 
                                                                            
                                            | Multiplexer/Demultiplexer Circuit | 1:1 | 
                                                                            
                                            | Current - Leakage (IS(off)) (Max) | 250pA | 
                                                                            
                                            | Channel Capacitance (CS(off), CD(off)) | 7pF 7pF | 
                                                                            
                                            | Switch Circuit | SPST - NO/NC | 
                                                                            
                                            | Switch Time (Ton, Toff) (Max) | 15ns, 8ns | 
                                                                            
                                            | Charge Injection | 2pC | 
                                                                            
                                            | Channel-to-Channel Matching (ΔRon) | 200m Ω | 
                                                                            
                                            | Crosstalk | -97dB @ 1MHz | 
                                                                            
                                            | Voltage - Supply, Single (V+) | 1.8V~5.5V | 
                                                                            
                                            | Radiation Hardening | No | 
                                                                            
                                            | RoHS Status | ROHS3 Compliant | 
                                                                                                    
                            
                         
                                                MAX4643ETA+T Overview
Presented in 8-WDFN Exposed Pad, this electrical component is convenient for overseas shipping. A high level of reliability can be achieved through the use of an advanced packaging method Tape & Reel (TR). Mounted in Surface Mount is this multiplexer. Multiplexers and demultiplexers have a number of circuits 1:1. Temperatures around -40°C~85°C TA are extended for operation. Unlike digital switches, these  are based on SPST - NO/NC switching circuits. There are 2 circuits in this multiplexer. MAX4643 can be used to search for analog multiplexer variants. The internal resistance of this digital multiplexer is 4Ohm. The datasheets for the 8 pins explain the functions. normally, users should not supply switches with voltages higher than 5.5V. Analog switch ics with Single supply type are cost-effective. 1.8V is the lowest voltage that should be fed to the electronic electronic part. This multiplexer would work with 1nA current. A voltage of 1.8V~5.5V is required to drain this analog switch from a single voltage supply. 
MAX4643ETA+T Features
Switch Circuit: SPST - NO/NC
1nA Supply Current
MAX4643ETA+T Applications
There are a lot of Maxim Integrated MAX4643ETA+T Analog Switches & Multiplexers ICs applications. 
- Sample hold systems
- Mechanical reed relay replacement
- Existing multiplexer applications (both fault-protected and nonfault-protected)
- Wireless Local Loop
- Audio and video signal routing
- Video signal routing
- Frame Relay Equipment
- Remote Powered Equipment
- Medical systems
- DSUs