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STMicroelectronics M74HC4851YRM13TR
- Part No.:
- M74HC4851YRM13TR
- Manufacturer:
- STMicroelectronics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HC4851YRM13TR.pdf
- Description:
- IC MUX 8:1 195OHM 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,678
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Product details
Overview
M74HC4851YRM13TR from STMicroelectronics is a single 8-channel analog multiplexer/demultiplexer with injection current protection, designed for automotive-grade signal routing in mixed-voltage environments. 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 SO-16 packaging - enabling robust channel selection in engine control units and battery management systems.
For engineers reviewing the M74HC4851YRM13TR datasheet, M74HC4851YRM13TR pinout, M74HC4851YRM13TR application, or M74HC4851YRM13TR equivalent, key selection criteria include its 1 mV max output voltage shift under 1 mA injection current, latch-up immunity >500 mA, AEC-Q100 qualification, and compatibility with legacy 4051/4851 logic families in automotive signal conditioning designs.
Technical Context
The M74HC4851YRM13TR implements silicon gate C2MOS technology to enable precise analog switching with controlled injection current coupling. Its internal structure isolates the enabled COM channel from voltage excursions on disabled I/O pins (up to VCC + 0.5 V or GND − 0.5 V), eliminating external clamping networks.
Channel selection uses three binary address inputs (A, B, C) plus an active-low INH inhibit pin; the truth table defines deterministic one-channel activation or full disable. The device maintains <1.2 V static voltage across the switch in on-state to prevent excessive ICC draw and ensure reliability per JESD17 latch-up testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports direct interface with 3.3 V and 5 V logic domains without level shifters |
| ON Resistance (Typ.) | 150 Ω at VCC = 6 V - ensures minimal signal attenuation and THD impact in audio and sensor front-ends |
| Propagation Delay | 8.6 ns typ. at VCC = 4.5 V - enables sub-100 MHz multiplexed sampling in real-time control loops |
| Injection Current Effect | VΔOUT ≤ 1 mV at VCC = 5 V, IIN ≤ 1 mA - guarantees signal integrity when disabled channels float beyond supply rails |
| ESD Robustness | HBM: 2000 V, CDM: 1000 V - meets automotive board-level ESD requirements without added protection circuitry |
| Operating Temperature | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and powertrain applications |
| Quiescent Current | 2 μA max. at TA = 25 °C - enables always-on monitoring circuits with negligible standby power penalty |
Pinout & Package
Package: SO-16 (automotive grade), 10.0 mm × 6.2 mm body, 1.27 mm pitch, ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 5, 12–15 | Independent I/O (0–7) | Bi-directional analog signal paths; each connects to COM only when selected by A/B/C and INH = L |
| 3 | COM (Common) | Shared analog terminal - serves as input during MUX mode or output during DEMUX mode |
| 6 | INH (Inhibit) | Active-low global disable; forces all switches OFF regardless of A/B/C state to block signal leakage |
| 7 | NC | No internal connection - must be left unconnected or tied to GND/VCC per layout best practice |
| 9–11 | A, B, C (Select) | 3-bit binary address; selects one of eight I/O channels (0–7) when INH = L |
| 8 | GND | Analog and digital reference ground - requires low-impedance plane connection to minimize crosstalk |
| 16 | VCC | Positive supply for logic and analog switch bias - decoupling capacitor (100 nF) required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| Injection current protection | Enables safe operation when disabled analog inputs exceed VCC or drop below GND - removes need for external diode-resistor clamp networks |
| Automotive qualification | AEC-Q100 Grade 1 certified with advanced screening per AEC-Q001/Q002 - validated for engine control, transmission, and ADAS subsystems |
| Low ON-resistance matching | ΔRON ≤ 20 Ω max. across channels at 2 V - ensures consistent gain and phase response in multi-channel sensor arrays |
| High noise immunity | VNIH/VNIL ≥ 28% VCC - rejects transient coupling on select lines in noisy automotive harness environments |
| Pin-compatible upgrade | Direct replacement for CD4051B and HEF4051B with identical pinout and function - simplifies legacy design refresh |
Applications
| Engine Control Unit (ECU) | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Multiplexing thermistor, pressure, and knock sensor signals into a single ADC input channel. IC Role / Device Role / Timing Role: Analog MUX routing eight sensor outputs to shared SAR ADC with <10 ns timing margin. Use Value: Reduces PCB layer count and component count while maintaining ±0.5 °C temperature measurement accuracy via matched RON. |
Use Scenario: Scanning cell voltages across 8-series Li-ion battery strings in electric vehicle packs. IC Role / Device Role / Timing Role: High-reliability analog switch enabling sequential cell monitoring at 10 kSPS with <1 mV cross-talk suppression. Use Value: Eliminates external TVS/clamp diodes on floating cell nodes, reducing BOM cost and thermal stress during overvoltage events. |
| Infotainment Audio Routing | Industrial PLC Analog I/O Module |
|
Use Scenario: Selecting between microphone inputs, line-in sources, and DAC outputs in automotive head units. IC Role / Device Role / Timing Role: Low-distortion analog path selector supporting 20 Hz–20 kHz bandwidth with <−90 dB THD+N. Use Value: 150 Ω RON and 15 pF off-capacitance preserve SNR >95 dB across all audio source selections. |
Use Scenario: Conditioning and routing 4–20 mA current loop sensor signals in factory automation controllers. IC Role / Device Role / Timing Role: Isolated channel selector interfacing with precision op-amp front-ends and isolated ADCs. Use Value: 500 mA latch-up immunity and 125 °C operation ensure uninterrupted operation in enclosed control cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HC4051M96 | Non-automotive grade; -55 °C to +125 °C rating; no AEC-Q100 qualification; 180 Ω RON at 6 V | Lacks injection current protection spec; not validated for automotive transients or long-term under-hood reliability | Select only for industrial or consumer applications where ambient temperature stays below 105 °C and voltage excursions are bounded |
| TS5A23157DCUR | Lower RON (0.9 Ω typ. at 3.3 V); 3.6 V max VCC; no injection current spec; 1.8 V min VCC | Not rated for >85 °C continuous operation; lacks latch-up immunity >500 mA per JESD17 | Prefer for portable electronics requiring ultra-low on-resistance but unsuitable for automotive or high-temp industrial use |
Compared with CD74HC4051M96 and TS5A23157DCUR, the M74HC4851YRM13TR uniquely combines AEC-Q100 qualification, guaranteed injection current immunity, and 125 °C operation - making it the only choice for safety-critical automotive signal routing where disabled channel overvoltage is unavoidable.
Availability
M74HC4851YRM13TR is available at Aetrix Electronics and suitable for engine control units, battery management systems, infotainment audio routing, and industrial PLC analog I/O modules requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for M74HC4851YRM13TR 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, sensing, and control solutions for automotive, industrial, and consumer markets.
The M74HC4851 belongs to ST's automotive-qualified HC logic family, engineered specifically for robust analog signal switching in harsh environments where voltage transients, wide temperature swings, and long product lifecycles are mandatory design constraints.
FAQ
What is the maximum allowable voltage on disabled analog inputs?
The M74HC4851YRM13TR allows disabled I/O pins to swing from -0.5 V to VCC + 0.5 V without affecting the enabled channel's output. This is verified per Table 4 absolute ratings and injection current test conditions in the datasheet, enabling direct connection to sensors operating outside the supply rail - such as thermocouples or floating battery cells.
Does this part require external pull-up or pull-down resistors on address pins?
No external biasing is required: the A, B, C, and INH inputs have CMOS-compatible thresholds (VIHC ≥ 3.15 V at VCC = 4.5 V; VILC ≤ 1.35 V) and exhibit <1 μA leakage current. Address lines can be driven directly from microcontroller GPIOs or FPGA outputs without additional resistors.
How does injection current protection affect PCB layout?
Because injection current protection eliminates the need for external clamping diodes and series resistors, PCB layout simplifies significantly: analog traces from disabled channels may route freely without guarding or isolation, reducing layer count and improving signal integrity - confirmed by measured VΔOUT ≤ 1 mV under worst-case 1 mA injection per Table 8.
Is the SO-16 package lead-free and RoHS compliant?
Yes - the M74HC4851YRM13TR uses ST's ECOPACK®-compliant SO-16 package, meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. Lead finish is matte tin, and the device carries the "E" marking per ST's packaging documentation in Doc ID 8640 Rev 7.
M74HC4851YRM13TR 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-SO
M74HC4851YRM13TR FAQ
1.How can I place an order for M74HC4851YRM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC4851YRM13TR 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 M74HC4851YRM13TR reliable?
The price and inventory of M74HC4851YRM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC4851YRM13TR is usually 5 days.
3.What payment methods are accepted for M74HC4851YRM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC4851YRM13TR transactions.
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4.How is shipping managed for M74HC4851YRM13TR?
M74HC4851YRM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC4851YRM13TR 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 M74HC4851YRM13TR?
For technical support, including M74HC4851YRM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC4851YRM13TR requirements.
6.How does Aetrix verify that M74HC4851YRM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC4851YRM13TR 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 M74HC4851YRM13TR meets industry standards.
7.What is the process for return or replacement of M74HC4851YRM13TR?
All M74HC4851YRM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC4851YRM13TR, 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 M74HC4851YRM13TR part is unused and in its original packaging.
Return procedure for M74HC4851YRM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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