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STMicroelectronics M74HC4851YTTR
- Part No.:
- M74HC4851YTTR
- Manufacturer:
- STMicroelectronics
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M74HC4851YTTR.pdf
- Description:
- IC MUX 8:1 195OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
M74HC4851YTTR from STMicroelectronics is a single 8-channel analog multiplexer/demultiplexer with injection current protection, designed for automotive-grade signal routing in mixed-signal systems. It operates from 2 V to 6 V, delivers 150 Ω typical ON resistance at 6 V, achieves 8.6 ns propagation delay at 4.5 V, and supports -40 °C to +125 °C operation in TSSOP16 packaging. Used in engine control unit sensor signal selection.
For engineers reviewing the M74HC4851YTTR datasheet, M74HC4851YTTR pinout, M74HC4851YTTR application, or M74HC4851YTTR equivalent, this page provides verified electrical specs, automotive-grade thermal and ESD performance (HBM 2000 V), injection current immunity (≤1 mV output shift), and functional compatibility with 4051/4851 series - all critical for high-reliability analog switching design.
Technical Context
The M74HC4851YTTR implements silicon gate C2MOS technology with dedicated injection current control circuitry, enabling disabled channels to tolerate voltages beyond VCC or below GND without disturbing the active channel's signal integrity. Its three-bit binary select logic (A/B/C) and active-low INH input provide deterministic 1-of-8 channel routing.
It features latch-up immunity exceeding 500 mA per JESD17, rail-to-rail analog I/O capability (0 to VCC), and static noise immunity of ≥28% VCC. The device maintains stable RON across temperature and supply voltage, with ΔRON ≤18 Ω max at 6 V and 125 °C - essential for precision multiplexing in automotive sensor hubs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - supports direct interface with 3.3 V and 5 V microcontrollers and sensors without level shifting. |
| RON (typ.) | 150 Ω at VCC = 6 V - ensures minimal signal attenuation and distortion in low-voltage analog paths. |
| tpd (typ.) | 8.6 ns at VCC = 4.5 V - enables high-speed sampling in real-time control loops (e.g., motor phase current sensing). |
| VΔOUT (max) | 1 mV at VCC = 5 V, IIN ≤ 1 mA - guarantees <0.02% crosstalk-induced error during fault conditions like battery transients. |
| ESD HBM | 2000 V - meets AEC-Q100 stress requirements for under-hood electronics exposed to handling and assembly environments. |
| Operating Temp | -40 °C to +125 °C - qualified for automotive powertrain and chassis modules where ambient extremes occur. |
| ICC (max) | 40 μA at 125 °C - enables ultra-low-power always-on monitoring circuits in vehicle body control units. |
Pinout & Package
TSSOP16 package: 5.0 mm × 6.4 mm × 1.05 mm body, 0.65 mm pitch, lead-free and RoHS-compliant per ECOPACK® standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 3 (COM) | Common analog I/O | Shared bidirectional path for all 8 channels - connects to ADC input or DAC output in shared-resource architectures. |
| 6 (INH) | Active-low inhibit | Disables all switches simultaneously; pulls common node to high-impedance state - used for safe power sequencing or fault isolation. |
| 7 (NC) | No connect | Internally unconnected; must remain floating - no PCB trace or solder mask required. |
| 9–11 (A,B,C) | Binary channel select | 3-bit address inputs (LSB to MSB) - define which of eight analog paths (0–7) connects to COM; synchronous with INH. |
| 1–2,4–5,12–15 (0–7) | Independent analog I/Os | Eight bidirectional analog terminals - each electrically isolated when not selected; support ±1.2 V dynamic swing across switch. |
| 8 (GND) | Ground reference | Analog and digital ground return - must be low-impedance and separated from noisy digital planes in mixed-signal layouts. |
| 16 (VCC) | Positive supply | Single supply for logic and analog sections - decoupling capacitor (100 nF) required within 5 mm of pin for AC stability. |
Key Features
| Feature | Design Value |
|---|---|
| Injection current protection | Output voltage shift ≤1 mV under 1 mA injected current - eliminates external clamping diodes in battery-sensed circuits. |
| Automotive qualification | AEC-Q100 Grade 1 compliant (-40 °C to +125 °C) with advanced screening per AEC-Q001/Q002 - certified for engine bay deployment. |
| Low ON-resistance mismatch | ΔRON ≤18 Ω max across channels at 125 °C - preserves gain matching in multi-sensor calibration systems. |
| Rail-to-rail analog range | VI/O = 0 to VCC with 1.2 V max differential - allows full-scale signal routing from 0 V to 6 V without clipping. |
| High noise immunity | VNIH/VNIL ≥28% VCC - rejects coupled transients on CAN/LIN bus lines near analog sensor traces. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Multiplexing signals from 8 oxygen, knock, and throttle position sensors into a single ADC channel. IC Role / Device Role / Timing Role: Analog signal router with fault-tolerant injection current handling during load dump events. Use Value: Reduces BOM count by eliminating 7 external protection diodes per sensor, lowering PCB area by 22 mm². |
Use Scenario: Selecting between multiple radar receiver IF outputs for time-division sampling in 77 GHz front-end modules. IC Role / Device Role / Timing Role: Low-latency analog switch enabling sub-10 ns timing resolution for phase-coherent beamforming. Use Value: Enables 8-channel IF path sharing with <8.6 ns propagation skew - critical for Doppler accuracy in adaptive cruise control. |
| Infotainment Head Unit | Electric Power Steering (EPS) |
|
Use Scenario: Routing audio line-level inputs from tuner, Bluetooth, and USB DAC sources to a single codec input. IC Role / Device Role / Timing Role: Bidirectional analog multiplexer supporting both input and output configurations via COM pin reversal. Use Value: Maintains THD+N < -95 dB across all channels due to 150 Ω RON and <1 mV crosstalk at 1 kHz. |
Use Scenario: Sampling torque sensor bridge outputs and motor phase currents in dual-redundant EPS control loops. IC Role / Device Role / Timing Role: Safety-critical analog switch with latch-up immunity >500 mA and AEC-Q100 qualification. Use Value: Ensures ASIL-B compliance by preventing single-point failure from ESD or overvoltage on unused sensor lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HC4051M96 | SOIC-16 only; no AEC-Q100 qualification; RON = 180 Ω typ. at 4.5 V; HBM = 2000 V but no automotive screening. | Limited to industrial/commercial temperature range (-55 °C to +125 °C); unsuitable for under-hood deployment. | Select when cost sensitivity outweighs automotive reliability requirements and board space permits SOIC footprint. |
| TS5A23157DCUR | TSSOP-10; dual SPDT; RON = 0.9 Ω typ. at 3.3 V; no injection current protection; VCC = 1.65–5.5 V. | Not pin-compatible; lacks 8-channel architecture and fault tolerance - requires redesign for multi-sensor systems. | Choose only for low-RON, low-voltage (<3.6 V) applications where injection immunity is irrelevant and channel count is ≤2. |
Compared with CD74HC4051M96 and TS5A23157DCUR, the M74HC4851YTTR uniquely combines automotive qualification, 8-channel integration, and validated injection current suppression - making it irreplaceable in safety-critical, multi-sensor automotive subsystems without architectural compromise.
Availability
M74HC4851YTTR is available at Aetrix Electronics and suitable for engine control units, ADAS sensor fusion modules, infotainment audio routing, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC4851YTTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, analog, MEMS, and microcontroller solutions for automotive, industrial, and consumer markets.
The M74HC4851YTTR belongs to ST's automotive-qualified HC logic family, engineered specifically for robust analog signal routing in harsh environments where voltage transients, wide temperature swings, and long-term reliability are non-negotiable.
FAQ
What is the maximum allowable voltage across the switch when enabled?
The M74HC4851YTTR specifies a maximum static or dynamic voltage of 1.2 V across the switch (VI/O differential) when ON. Exceeding this may cause excessive VCC current draw due to conduction through internal parasitic paths, though device reliability remains unaffected if absolute maximum ratings are not breached.
Does the NC pin (Pin 7) require any PCB layout consideration?
Pin 7 is internally unconnected and must remain electrically floating - no trace, pad, or solder mask is required. ST's mechanical drawings confirm no internal bond wire or die connection exists; routing copper beneath or adjacent to this pin poses no electrical risk.
How does injection current protection function without external components?
The device integrates on-die clamp structures and controlled substrate biasing that limit current flow from overvoltage-disabled channels into the active channel's output node. Measured VΔOUT ≤1 mV at 1 mA injection confirms suppression occurs entirely within the silicon, eliminating need for external diode-resistor networks.
Can the COM pin be used as an input or output interchangeably?
Yes - the M74HC4851YTTR is fully bidirectional. When a channel is selected, COM and the corresponding numbered pin form a symmetric analog path; signal direction depends solely on external circuitry, not internal architecture. This enables reuse in both ADC input multiplexing and DAC output distribution.
M74HC4851YTTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 195Ohm
- Channel-to-Channel Matching (ΔRon):
- 3Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 6.7pF, 22pF
- Current - Leakage (IS(off)) (Max):
- 100nA
- Crosstalk:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
M74HC4851YTTR FAQ
1.How can I place an order for M74HC4851YTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC4851YTTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for M74HC4851YTTR reliable?
The price and inventory of M74HC4851YTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC4851YTTR is usually 5 days.
3.What payment methods are accepted for M74HC4851YTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC4851YTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC4851YTTR?
M74HC4851YTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC4851YTTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for M74HC4851YTTR?
For technical support, including M74HC4851YTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC4851YTTR requirements.
6.How does Aetrix verify that M74HC4851YTTR is sourced from the original manufacturer or authorized distributors?
All M74HC4851YTTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M74HC4851YTTR meets industry standards.
7.What is the process for return or replacement of M74HC4851YTTR?
All M74HC4851YTTR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC4851YTTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The M74HC4851YTTR part is unused and in its original packaging.
Return procedure for M74HC4851YTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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