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Product Detailed Parameters
- Description：ANALOG MULTIPLEXERS/DEMULTIPLEXE
- Series：74HCT
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Switch Circuit：SP8T - Open/Closed
- Multiplexer/Demultiplexer Circuit：8:01
- On-State Resistance (Max)：400Ohm
- Channel-to-Channel Matching (ΔRon)：-
- Voltage - Supply, Single (V+)：4.5V ~ 5.5V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：-
- -3db Bandwidth：-
- Charge Injection：-
- Channel Capacitance (CS(off), CD(off))：40pF
- Current - Leakage (IS(off)) (Max)：100nA
- Crosstalk：-
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-TSSOP
- Number of Circuits：1
- Grade：-
- Qualification：-
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Overview
The MC74HCT4851ADTR2G-Q is an automotive-grade analog multiplexer/demultiplexer manufactured by onsemi. It features injection current effect control, allowing disabled channel signals to exceed the supply voltage without affecting the enabled channel. The device operates with a DC supply voltage range of 4.5 V to 5.5 V and supports an operating temperature from -55°C to +125°C. It utilizes low power silicon gate CMOS technology and contains 154 FETs or 36 equivalent gates. The maximum 'ON' resistance is 550 Ω at 4.5 V and 400 Ω at 5.5 V. Propagation delay is typically 40 ns at 5.0 V.
Feature Summary
- Injection current cross-coupling less than 1 mV/mA
- Pin compatible to HC405X and MC1405XB devices
- AEC-Q100 qualified and PPAP capable for automotive applications
Applications
- Automotive sensor signal routing
- Data acquisition systems requiring high noise immunity
- Multiplexing analog inputs in microcontroller-based designs
Procurement Notes
Verify the specific ordering suffix '-Q' indicates compliance with unique site and control change requirements mandated by AEC-Q100 standards. Confirm package type matches design constraints, as this model uses TSSOP-16. Ensure RoHS compliance documentation aligns with project environmental regulations before finalizing procurement orders.
Selection Notes
Select this component when HCT logic levels are required for digital control interfaces within a 4.5 V to 5.5 V supply range. The injection current control feature makes it suitable for environments where disabled channels may experience voltages exceeding the main supply rail. Verify thermal dissipation capabilities against the maximum junction temperature limits specified in the datasheet.
Part Context
This part belongs to the MC74HC4851A family of analog switches. The 'T' suffix denotes HCT logic compatibility, while 'DTR2G' specifies the TSSOP-16 tape and reel packaging. The '-Q' suffix differentiates it as an automotive-grade variant subject to stricter manufacturing controls compared to standard commercial versions.
Replacement Considerations
MC74HC4851ADTR2G (Standard Commercial Grade)
FAQ
What is the function of the injection current effect control?
It allows signals at disabled analog input channels to exceed the supply voltage range without affecting the signal of the enabled analog channel.
Is this device compatible with standard 4051 series devices?
Yes, it is pin compatible to standard HC405X and MC1405XB analog mux/demux devices.
What does the '-Q' suffix signify?
It indicates the device is qualified for automotive and other applications requiring unique site and control change requirements, specifically AEC-Q100 qualification and PPAP capability.
