My Inquiry
My Account
STMicroelectronics M74HC4851TTR
- Part No.:
- M74HC4851TTR
- Manufacturer:
- STMicroelectronics
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M74HC4851TTR.pdf
- Description:
- IC MUX 8:1 195OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,423
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M74HC4851TTR from STMicroelectronics is a single 8-channel analog multiplexer/demultiplexer with injection current protection, designed for high-reliability signal routing in automotive and industrial 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 -55 °C to +125 °C operation in TSSOP16 packaging.
For engineers reviewing the M74HC4851TTR datasheet, M74HC4851TTR pinout, M74HC4851TTR application, or M74HC4851TTR equivalent, key selection criteria include injection current immunity (≤1 mV output shift under 1 mA injection), latch-up robustness (>500 mA), ESD tolerance (2000 V HBM), and compatibility with legacy 4051/4851 logic families.
Technical Context
The M74HC4851TTR implements silicon gate C2MOS technology with dedicated injection current control circuitry that isolates enabled channels from voltage excursions on disabled inputs-enabling safe operation when analog signals exceed VCC or drop below GND. Its three-bit binary select (A/B/C) and active-low INH input provide deterministic channel routing without bus contention.
It features dual-domain switching: digital control logic (VIH/VIL = 28% VCC min. noise margin) drives analog switches with low charge injection (<1 pC typical) and minimal RON mismatch (≤18 Ω max. ΔRON at 6 V). The common I/O (COM) terminal supports bidirectional signal flow, and NC pin (Pin 7) is internally unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V logic domains without level shifting |
| RON (Typ.) | 150 Ω at VCC = 6 V - ensures <1% gain error in 10 kΩ sensor signal paths |
| tpd (Typ.) | 8.6 ns at VCC = 4.5 V - supports multiplexed ADC sampling up to ~50 MSPS effective rate |
| VΔOUT (Max.) | 1 mV at VCC = 5 V, IIN ≤ 1 mA - guarantees sub-LSB disturbance in 12-bit precision systems |
| ESD HBM | 2000 V - meets IEC 61000-4-2 Level 2 for board-level handling robustness |
| Latch-up | >500 mA per JESD17 - prevents destructive failure during power-rail transients |
| IOFF (Max.) | ±1.0 μA at VCC = 6 V - limits leakage-induced offset in high-impedance sensor front-ends |
Pinout & Package
TSSOP16 package: 5.0 mm × 6.4 mm body, 0.65 mm pitch, 1.05 mm height, lead-free and RoHS-compliant per ECOPACK® specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 3 (COM) | Common analog I/O | Bidirectional path shared across all 8 channels; must be AC-coupled or buffered when used as demux output |
| 6 (INH) | Active-low inhibit | Asserting HIGH disables all switches, placing COM and channel pins in high-Z state with <1 μA leakage |
| 7 (NC) | No connection | Internally unconnected; no PCB trace or thermal pad required |
| 9–11 (A,B,C) | Binary channel select | 3-bit address decoding (L/L/L = channel 0; H/H/H = channel 7); no internal pull-ups |
| 1,2,4,5,12–15 (0–7) | Independent analog I/Os | Each connects to COM when selected; supports ±1.2 V dynamic swing relative to VCC/GND |
| 8 (GND) | Ground reference | Analog and digital return; requires low-inductance connection to minimize crosstalk |
| 16 (VCC) | Positive supply | Power rail for both logic and analog sections; decoupling capacitor (100 nF) mandatory within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| Injection current protection | Output voltage shift ≤1 mV under 1 mA injected into disabled channels - eliminates external clamping diodes in automotive battery-sensed circuits |
| Wide VCC range | 2 V to 6 V operation - allows single-part support of 3.3 V microcontrollers and 5 V legacy sensors |
| Low quiescent current | 2 μA max. ICC at 25 °C - enables always-on monitoring in battery-powered telematics modules |
| High noise immunity | VNIH/VNIL = 28% VCC min. - rejects >700 mV ripple on 3.3 V control lines in engine bay environments |
| Pin-compatible upgrade | Direct replacement for CD4051BC and HEF4051B - reduces redesign effort in legacy industrial PLC I/O modules |
Applications
| Automotive Cabin Sensing | Industrial Analog Data Acquisition |
|---|---|
|
Use Scenario: Multiplexing cabin temperature, humidity, and CO₂ sensor outputs to a single ADC in HVAC control units. IC Role / Device Role / Timing Role: Analog MUX routing 8 sensor signals to one SAR ADC input with <10 ns timing skew between channels. Use Value: Injection current protection prevents false readings when 12 V battery transients couple onto unselected sensor lines. |
Use Scenario: Scanning thermocouple, RTD, and strain gauge inputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: High-precision signal selector enabling 16-bit resolution across 8 channels with <0.01% RON matching. Use Value: 150 Ω ON resistance at 6 V minimizes self-heating error in 4–20 mA loop-powered sensor interfaces. |
| Consumer Audio Signal Routing | Medical Patient Monitoring |
|
Use Scenario: Switching between microphone, line-in, and Bluetooth audio sources in smart speaker baseband processing. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling zero-crossing mute transitions via synchronized INH control. Use Value: 8.6 ns propagation delay ensures phase coherence across multi-source audio mixing paths. |
Use Scenario: Selecting ECG, SpO₂, and NIBP sensor front-ends in portable patient monitors with single ADC architecture. IC Role / Device Role / Timing Role: Medical-grade analog MUX providing isolation between biopotential channels during electrode disconnect events. Use Value: Latch-up immunity >500 mA protects against defibrillation pulse coupling in emergency scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HC4051M96 | Higher RON (180 Ω typ. at 4.5 V); no specified injection current protection; 2000 V HBM only | Lacks automotive-grade transient resilience; suitable for consumer-grade data loggers only | Select when cost sensitivity outweighs need for battery-transient immunity |
| ADG708BRUZ | Lower RON (3.5 Ω typ. at 3 V); 3 V only supply; no INH pin; 1000 V HBM | Optimized for low-voltage portable devices; incompatible with 5 V control logic | Select for ultra-low distortion in battery-powered medical wearables |
Compared with CD74HC4051M96 and ADG708BRUZ, the M74HC4851TTR uniquely balances wide-supply operation, injection current hardening, and industrial temperature range-making it the only choice for under-hood automotive signal conditioning where voltage excursions and reliability are non-negotiable.
Availability
M74HC4851TTR is available at Aetrix Electronics and suitable for automotive cabin control, industrial PLC analog input modules, consumer audio source switching, and portable medical monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC4851TTR 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 high-reliability HC logic family, engineered specifically for analog signal routing in harsh environments where voltage transients, wide temperature swings, and long-term stability are critical design constraints.
FAQ
What is the maximum allowable voltage on analog inputs when VCC = 0 V?
Per Absolute Maximum Ratings (Table 4), analog I/O pins tolerate -0.5 V to VCC + 0.5 V. With VCC = 0 V, this permits -0.5 V to +0.5 V only. Exceeding these limits risks parasitic diode conduction and potential latch-up. Always ensure analog signals remain within this window during power-down sequences.
Can M74HC4851TTR be used with bipolar analog signals?
Yes-its analog I/O pins support signals from GND to VCC, and the injection current protection extends to negative excursions down to -0.5 V (per absolute ratings). For true bipolar operation (±2.5 V), external level-shifting or clamping is required since the device lacks native negative rail support.
How does the INH pin behave during power-up?
INH is not internally biased; its state is undefined until VCC reaches ≥1.5 V. To prevent unintended channel activation, tie INH to VCC via a 10 kΩ resistor or drive it actively from a power-good signal. Uncontrolled INH during ramp-up may cause momentary switch closure and signal coupling.
Is the TSSOP16 package suitable for reflow soldering in lead-free processes?
Yes-the M74HC4851TTR TSSOP16 is qualified for standard Pb-free reflow per JEDEC J-STD-020. Peak temperature must not exceed 260 °C for ≤60 seconds, and moisture sensitivity level is MSL3. Bake before assembly if exposed to ambient >60% RH for >168 hours.
M74HC4851TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
M74HC4851TTR FAQ
1.How can I place an order for M74HC4851TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC4851TTR 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 M74HC4851TTR reliable?
The price and inventory of M74HC4851TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC4851TTR is usually 5 days.
3.What payment methods are accepted for M74HC4851TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC4851TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC4851TTR?
M74HC4851TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC4851TTR 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 M74HC4851TTR?
For technical support, including M74HC4851TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC4851TTR requirements.
6.How does Aetrix verify that M74HC4851TTR is sourced from the original manufacturer or authorized distributors?
All M74HC4851TTR 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 M74HC4851TTR meets industry standards.
7.What is the process for return or replacement of M74HC4851TTR?
All M74HC4851TTR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC4851TTR, 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 M74HC4851TTR part is unused and in its original packaging.
Return procedure for M74HC4851TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M74HC4851TTR Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
