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Texas Instruments CD74HC368M
- Part No.:
- CD74HC368M
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC368M.pdf
- Description:
- IC BUFFER INVERT 6V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:108
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Product details
Overview
CD74HC368M from Texas Instruments is a high-speed CMOS hex inverting buffer/line driver with three-state outputs, designed for bus interface and data routing in industrial control, instrumentation, and embedded systems. It features dual independent three-state enable controls (1OE, 2OE), 6-channel inverting logic, ±35 mA output drive, and operates across 2 V to 6 V supply range with propagation delay of 9 ns (VCC = 5 V, CL = 15 pF).
For engineers reviewing the CD74HC368M datasheet, CD74HC368M pinout, CD74HC368M application, or CD74HC368M equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for bus buffering and level translation in temperature-critical designs.
Technical Context
The CD74HC368M implements silicon-gate CMOS technology with buffered inputs and high-current bus-driver outputs capable of driving up to 15 LSTTL loads. Its dual enable architecture (1OE controlling Y1–Y4, 2OE controlling Y5–Y6) enables selective bus segmentation and power-aware signal gating.
It supports wide temperature operation (–55 °C to +125 °C), exhibits balanced tPLH/tPHL propagation delays (typ. 9 ns at 5 V), and delivers low ICC (≤160 μA over full temp range) while maintaining noise immunity (NIL/NIH = 30% of VCC). Input leakage remains ≤±1 μA, and three-state output leakage is ≤±10 μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Inverting hex buffer with three-state outputs - provides signal inversion and bus isolation simultaneously. |
| Supply Voltage Range | 2 V to 6 V - compatible with mixed-voltage systems and battery-powered industrial sensors. |
| Propagation Delay (tPD) | 9 ns typ. at VCC = 5 V, CL = 15 pF - enables reliable timing in 50 MHz+ digital control loops. |
| Output Drive Strength | ±35 mA continuous per output - sustains fast edge rates into 50 pF bus loads without external drivers. |
| Operating Temperature | –55 °C to +125 °C - qualified for under-hood automotive modules, aerospace avionics, and downhole instrumentation. |
| Input Leakage Current | ≤±1 μA at VCC = 6 V - minimizes standby current in always-on monitoring circuits. |
| Three-State Leakage | ≤±10 μA at VO = VCC/GND - ensures clean high-impedance state during bus arbitration. |
Pinout & Package
CD74HC368M is housed in a 16-pin SOIC (D) package with nominal body size 9.90 mm × 3.90 mm, RoHS-compliant NIPDAU lead finish, and moisture sensitivity level (MSL) 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1OE) | Output Enable 1 | Active-low control for outputs Y1–Y4; enables bus segment isolation in multi-drop systems. |
| 2 (1A1) | Input A1 | Inverting input for first buffer channel; drives Y1 with logical complement. |
| 3 (1Y1) | Output Y1 | Inverted output corresponding to A1; three-state when 1OE = HIGH. |
| 4 (1A2) | Input A2 | Inverting input for second buffer channel; drives Y2 with logical complement. |
| 5 (1Y2) | Output Y2 | Inverted output corresponding to A2; three-state when 1OE = HIGH. |
| 6 (1A3) | Input A3 | Inverting input for third buffer channel; drives Y3 with logical complement. |
| 7 (1Y3) | Output Y3 | Inverted output corresponding to A3; three-state when 1OE = HIGH. |
| 8 (GND) | Ground | Reference node for all logic and output stages; requires low-inductance connection to minimize ground bounce. |
| 9 (1A4) | Input A4 | Inverting input for fourth buffer channel; drives Y4 with logical complement. |
| 10 (1Y4) | Output Y4 | Inverted output corresponding to A4; three-state when 1OE = HIGH. |
| 11 (2Y1) | Output Y5 | Inverted output corresponding to A5; three-state when 2OE = HIGH. |
| 12 (2A1) | Input A5 | Inverting input for fifth buffer channel; drives Y5 with logical complement. |
| 13 (2Y2) | Output Y6 | Inverted output corresponding to A6; three-state when 2OE = HIGH. |
| 14 (2A2) | Input A6 | Inverting input for sixth buffer channel; drives Y6 with logical complement. |
| 15 (2OE) | Output Enable 2 | Active-low control for outputs Y5–Y6; allows independent gating of two-channel subset. |
| 16 (VCC) | Supply Voltage | Positive supply rail (2–6 V); requires local 0.1 μF ceramic bypass capacitor per device. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent three-state enables | Enables partial bus control: 1OE manages four channels (Y1–Y4), 2OE manages two (Y5–Y6), reducing contention in segmented data paths. |
| High noise immunity (30% VCC) | Ensures robust operation in electrically noisy environments such as motor drives and PLC backplanes without added filtering. |
| Low power dissipation vs. LSTTL | Reduces system thermal load and extends battery life in portable instrumentation - ICC ≤160 μA over full temperature range. |
| Wide supply voltage (2–6 V) | Supports direct interfacing between 3.3 V microcontrollers and 5 V legacy peripherals without level shifters. |
| 15 LSTTL load drive capability | Drives long traces or multiple downstream inputs without external buffers - simplifies PCB layout and BOM count. |
Applications
| Industrial Bus Interface | Automotive Sensor Hub |
|---|---|
|
Use Scenario: Isolating and buffering bidirectional data lines between a 32-bit MCU and multiple CAN/LIN transceivers on a shared PCB trace. IC Role / Device Role / Timing Role: Inverting three-state buffer providing direction-controlled signal conditioning and bus contention prevention. Use Value: Dual OE pins allow dynamic partitioning of six sensor channels, enabling selective wake-up and low-power sleep modes without software overhead. |
Use Scenario: Level-shifting and buffering analog-to-digital converter (ADC) output signals in an engine control unit operating at –40 °C to +125 °C. IC Role / Device Role / Timing Role: Inverting buffer converting ADC's open-drain outputs to CMOS-compatible push-pull signals with precise timing margins. Use Value: Guaranteed 9 ns propagation delay and –55 °C to +125 °C qualification ensure deterministic sampling window alignment across extreme ambient conditions. |
| Test Equipment Signal Routing | Avionics Data Acquisition |
|
Use Scenario: Multiplexing calibration reference voltages from a precision DAC to multiple DUT inputs in automated test equipment. IC Role / Device Role / Timing Role: Hex inverting buffer acting as programmable signal gate and polarity adjuster for stimulus generation. Use Value: ±35 mA drive strength maintains <100 ps edge jitter across 1 m coaxial cables, preserving signal integrity during high-speed switching. |
Use Scenario: Interfacing radiation-tolerant FPGAs with legacy MIL-STD-1553 bus controllers in satellite payload telemetry subsystems. IC Role / Device Role / Timing Role: Three-state inverting buffer providing fault-isolated data path between FPGA I/O banks and bus transceivers. Use Value: MSL-1 SOIC packaging and 150 °C max junction rating support conformal coating and high-reliability reflow processes required for space-grade assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC368N | Same logic function and pinout; PDIP-16 package only; rated for –40 °C to +85 °C (not extended temp). | Limited to commercial/industrial ambient ranges; unsuitable for military or downhole deployments. | Select SN74HC368N only for cost-sensitive, non-extended-temp applications where SOIC footprint is not required. |
| CD74HCT368M | Pin-compatible HCT variant; 4.5–5.5 V operation only; TTL-input compatible (VIH = 2 V min, VIL = 0.8 V max). | Required when interfacing directly with legacy 5 V TTL logic without level translation; not suitable for 3.3 V systems. | Choose CD74HCT368M exclusively for strict 5 V LSTTL interoperability; CD74HC368M preferred for mixed-voltage or low-power designs. |
Compared with SN74HC368N and CD74HCT368M, CD74HC368M uniquely supports 2–6 V operation, extended temperature range (–55 °C to +125 °C), and lower static current - making it the optimal choice for ruggedized, multi-rail embedded systems requiring long-term reliability.
Availability
CD74HC368M is available at Aetrix Electronics and suitable for industrial automation, avionics data acquisition, and automotive sensor interface applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD74HC368M 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of heritage in high-reliability logic and interface solutions.
CD74HC368M belongs to TI's CD74HC high-speed CMOS logic family, engineered for low-power, high-noise-immunity bus interfacing in harsh-environment applications including aerospace, defense, and industrial control.
FAQ
What is the maximum operating supply voltage for CD74HC368M?
The absolute maximum supply voltage for CD74HC368M is 7 V, but the recommended operating range is 2 V to 6 V per TI's datasheet. Operating above 6 V risks exceeding absolute maximum ratings and may cause permanent damage. For reliable long-term operation, maintain VCC within 2–6 V, with 5 V being typical for mixed-signal interfacing. The CD74HC368M datasheet specifies electrical characteristics only within this recommended range.
Does CD74HC368M support true three-state outputs with high-impedance isolation?
Yes, CD74HC368M provides true three-state outputs: when either 1OE or 2OE is HIGH, the corresponding outputs (Y1–Y4 or Y5–Y6) enter high-impedance mode with leakage ≤±10 μA at VCC or GND. This enables safe bus sharing and prevents signal contention in multi-driver systems. The CD74HC368M datasheet confirms this behavior in Table 7-1 (Truth Table) and Section 5.4 (Electrical Characteristics).
Can CD74HC368M be used with 3.3 V microcontrollers?
Yes, CD74HC368M is fully compatible with 3.3 V systems: its 2–6 V supply range includes 3.3 V, and its input thresholds scale with VCC (VIH = 2.1 V min, VIL = 1.1 V max at 3.3 V). Outputs swing rail-to-rail, delivering >3.1 V HIGH and <0.2 V LOW - meeting 3.3 V CMOS logic requirements. The CD74HC368M datasheet validates this in Sections 5.2 and 5.4.
What is the thermal performance of CD74HC368M in SOIC package?
CD74HC368M in SOIC (D) package has a junction-to-ambient thermal resistance (RθJA) of 73 °C/W. At maximum rated power dissipation (calculated using CPD = 40 pF and typical 1 MHz toggle rate), junction temperature rise remains within safe limits up to +125 °C ambient. The CD74HC368M datasheet specifies this value in Section 5.3 and recommends a 0.1 μF ceramic bypass capacitor near VCC for stability.
Is CD74HC368M pin-compatible with CD74HCT368M?
Yes, CD74HC368M and CD74HCT368M share identical pinout, package (SOIC-16), and functional block diagram. However, they differ in supply range (HC: 2–6 V; HCT: 4.5–5.5 V) and input compatibility (HCT accepts standard TTL levels). The CD74HC368M datasheet explicitly states pin and functional compatibility with CD74HCT368M in Section 7.1 and the Device Information table.
CD74HC368M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 2, 4 (Hex)
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HC368M FAQ
1.How can I place an order for CD74HC368M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC368M 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 CD74HC368M reliable?
The price and inventory of CD74HC368M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC368M is usually 5 days.
3.What payment methods are accepted for CD74HC368M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC368M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC368M?
CD74HC368M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC368M 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 CD74HC368M?
For technical support, including CD74HC368M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC368M requirements.
6.How does Aetrix verify that CD74HC368M is sourced from the original manufacturer or authorized distributors?
All CD74HC368M 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 CD74HC368M meets industry standards.
7.What is the process for return or replacement of CD74HC368M?
All CD74HC368M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC368M, 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 CD74HC368M part is unused and in its original packaging.
Return procedure for CD74HC368M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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