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STMicroelectronics M74HCT04B1R
- Part No.:
- M74HCT04B1R
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
M74HCT04B1R.pdf
- Description:
- IC INVERTER 6CH 1-INP 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,080
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Product details
Overview
M74HCT04B1R from STMicroelectronics is a high-speed CMOS hex inverter in 14-pin plastic DIP package, delivering 11 ns typical propagation delay at 4.5 V, ±4 mA symmetrical output drive, TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and 1 µA max quiescent ICC at 25°C - used for logic-level inversion and signal conditioning in industrial control backplanes and legacy 5 V digital systems.
For engineers reviewing the M74HCT04B1R datasheet, M74HCT04B1R pinout, M74HCT04B1R application, or M74HCT04B1R equivalent, this page provides verified functional identity, validated DIP-14 pin mapping, confirmed DC/AC electrical specs across temperature ranges, and real-world interface compatibility with TTL/NMOS logic families.
Technical Context
The M74HCT04B1R implements six independent CMOS inverter gates using silicon gate C2MOS technology with three-stage buffered outputs, enabling high noise immunity and stable rail-to-rail switching. Its input protection circuits guard against ESD and transient overvoltage, and its symmetrical output impedance ensures matched rise/fall times (tPLH ≅ tPHL).
It operates within 4.5–5.5 V supply range and supports full industrial temperature range (−55°C to +125°C), with input thresholds explicitly designed for direct interfacing to TTL outputs (VIH = 2.0 V min, VIL = 0.8 V max) without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tPD (typ) | 11 ns at VCC = 4.5 V - enables reliable operation in 30 MHz+ clock distribution paths with margin |
| IOH / IOL (min) | ±4 mA - drives standard TTL loads directly without external buffers |
| VCC Range | 4.5–5.5 V - compatible with regulated 5 V power rails in legacy industrial systems |
| ICC (max) | 1 µA at TA = 25°C - supports low-static-power standby modes in battery-backed controllers |
| VIH / VIL | 2.0 V min / 0.8 V max - guarantees robust recognition of TTL logic levels |
| Operating Temp | −55°C to +125°C - qualified for under-hood automotive and military-grade embedded applications |
| CIN (max) | 10 pF - minimizes capacitive loading on driving gates in dense PCB layouts |
Pinout & Package
Package: Plastic Dual In-line Package (DIP-14), 0.3" wide, through-hole mount, JEDEC MS-001 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | CMOS-compatible logic inputs accepting TTL-level signals; each protected by diode clamps |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Inverted logic outputs with symmetrical ±4 mA drive capability and rail-to-rail swing |
| 7 | GND | Ground reference for all internal logic and I/O; must be low-impedance connection |
| 14 | VCC | Positive supply terminal (4.5–5.5 V); decoupling capacitor required near pin for AC stability |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - eliminates need for level translators when interfacing with 74LS/74ALS families |
| Balanced propagation delays | tPLH ≅ tPHL - ensures minimal duty-cycle distortion in clock inversion or pulse shaping |
| Symmetrical output impedance | |IOH| = IOL = 4 mA (min) - supports matched rise/fall times and reduces EMI in edge-sensitive routing |
| ESD and transient protection | Integrated input diode clamps - withstands ±20 mA input diode current per pin without damage |
| Wide temperature operation | −55°C to +125°C - certified for use in engine control units and industrial PLC I/O modules |
Applications
| Industrial Backplane Logic | Legacy System Signal Conditioning |
|---|---|
Use Scenario: Inverting address/data strobes and handshake signals on 5 V ISA-style backplanes. IC Role / Device Role / Timing Role: Hex inverter providing level-restored, low-skew signal inversion for synchronous bus timing. Use Value: 11 ns tPD and matched tPLH/tPHL ensure setup/hold timing margins are preserved across all six channels. |
Use Scenario: Converting TTL-compatible control signals to CMOS-compatible levels in retro-computing peripheral adapters. IC Role / Device Role / Timing Role: Logic-level translator and waveform shaper for vintage microcontroller expansion cards. Use Value: VIH/VIL thresholds guarantee reliable detection of 74LS-family outputs without external resistors or biasing. |
| Automotive Engine Control Interface | Programmable Logic Glue Logic |
Use Scenario: Inverting sensor enable lines and diagnostic feedback pulses in engine management ECUs operating at −40°C to +125°C. IC Role / Device Role / Timing Role: Robust, temperature-stable inverter for safety-critical enable/disable sequencing. Use Value: Full −55°C to +125°C qualification and 1 µA ICC support fail-safe low-power monitoring states. |
Use Scenario: Implementing combinatorial logic (e.g., NOT gates in PAL/GAL replacement circuits) on FPGA companion boards. IC Role / Device Role / Timing Role: Discrete glue logic element reducing FPGA pin count and simplifying PCB routing. Use Value: DIP-14 package allows manual prototyping and field-replaceable design; 10 pF CIN limits fanout loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT04N | Same logic function, identical AC/DC specs, but TI's DIP-14 has slightly higher ICC (2 µA max) and wider VCC tolerance (4.5–5.5 V same) | Approved for TI-specific automotive PPAP programs; same pinout and footprint | Select when sourcing from TI-authorized channels or requiring TI-specific qualification documentation |
| 74HCT04D | NXP SO-14 version; identical electrical specs but surface-mount only; no through-hole option | Used in space-constrained PCBs where DIP-14 is not viable; requires reflow assembly | Select for automated SMT production; not interchangeable mechanically with M74HCT04B1R |
Compared with SN74HCT04N and 74HCT04D, the M74HCT04B1R uniquely combines STMicroelectronics' extended temperature certification (−55°C), DIP-14 through-hole packaging, and 1 µA max ICC - making it optimal for repair, prototyping, and high-reliability legacy system maintenance.
Availability
M74HCT04B1R is available at Aetrix Electronics and suitable for industrial backplane logic, automotive engine control interfaces, and legacy system signal conditioning requiring stable component supply across long-lifecycle programs.
Supply support for M74HCT04B1R 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, designing and manufacturing analog, MCU, power, and discrete components for industrial, automotive, and consumer markets.
The M74HCT04B1R belongs to ST's legacy HCT logic family, engineered specifically for seamless interoperability between CMOS and TTL systems in cost-sensitive, high-volume industrial control applications.
FAQ
Is M74HCT04B1R pin-compatible with standard 7404 logic devices?
Yes - M74HCT04B1R uses the industry-standard 14-pin DIP layout with identical pin assignments to 74LS04, 74HC04, and 74HCT04 variants. Pin 1 is input A, pin 2 is output Y, continuing through six independent inverters, with GND on pin 7 and VCC on pin 14.
What is the maximum capacitive load this device can drive reliably?
The M74HCT04B1R is characterized for CL = 50 pF in AC testing, and its 4 mA output drive supports stable operation into ≤50 pF loads at 11 ns tPD. For heavier loads (>70 pF), propagation delay increases nonlinearly and may exceed 20 ns; buffer stages are recommended beyond that point.
Does this part support mixed-voltage operation, e.g., 3.3 V inputs with 5 V supply?
No - M74HCT04B1R is strictly a 5 V-only device. Its absolute maximum input voltage is VCC + 0.5 V (≤6.0 V), and VIH/VIL thresholds are defined only for 4.5–5.5 V VCC. Applying 3.3 V inputs risks marginal recognition and is outside guaranteed operating conditions.
Can M74HCT04B1R be used in place of 74LS04 in existing designs?
Yes, with verification of fanout and timing margins. It matches 74LS04's VIH/VIL, drives same TTL loads (4 mA), and offers lower ICC and wider temperature range. However, its 11 ns tPD is faster than 74LS04's ~15 ns, which may require checking setup/hold timing in synchronous systems.
M74HCT04B1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HCT
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 18ns @ 4.5V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-DIP
M74HCT04B1R FAQ
1.How can I place an order for M74HCT04B1R through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HCT04B1R 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 M74HCT04B1R reliable?
The price and inventory of M74HCT04B1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HCT04B1R is usually 5 days.
3.What payment methods are accepted for M74HCT04B1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HCT04B1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HCT04B1R?
M74HCT04B1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HCT04B1R 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 M74HCT04B1R?
For technical support, including M74HCT04B1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HCT04B1R requirements.
6.How does Aetrix verify that M74HCT04B1R is sourced from the original manufacturer or authorized distributors?
All M74HCT04B1R 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 M74HCT04B1R meets industry standards.
7.What is the process for return or replacement of M74HCT04B1R?
All M74HCT04B1R units undergo pre-shipment inspection (PSI). If there is an issue with M74HCT04B1R, 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 M74HCT04B1R part is unused and in its original packaging.
Return procedure for M74HCT04B1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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