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Texas Instruments CD74ACT174M
- Part No.:
- CD74ACT174M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74ACT174M.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:158
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Product details
Overview
CD74ACT174M from Texas Instruments is a hex D-type positive-edge-triggered flip-flop with asynchronous clear, designed for 4.5V–5.5V operation. It contains six independent flip-flops with single-rail outputs, ±24mA output drive, TTL-compatible inputs, and balanced propagation delays (tPLH/tPHL ≤14ns at 125°C). It serves in synchronous data latching and register storage within industrial control logic circuits.
For engineers reviewing the CD74ACT174M datasheet, CD74ACT174M pinout, CD74ACT174M application, or CD74ACT174M equivalent, key selection criteria include its SOIC-16 package, 91MHz max clock frequency at 85°C, 3.94V VOH at –24mA, 0.44V VOL at 24mA, and SCR-latchup-resistant CMOS process - all critical for reliable 5V logic interfacing and register stability.
Technical Context
The CD74ACT174M implements six independent D-type latches triggered on the rising edge of CLK, with a shared active-low asynchronous CLR input that forces all Q outputs low regardless of clock state. Each flip-flop transfers the D-input value to Q only when CLK transitions high, with setup (2ns) and hold (2.2ns) timing validated across –40°C to 85°C.
Its architecture combines buffered TTL-compatible inputs (VIH = 2V, VIL = 0.8V), rail-to-rail CMOS output swing, and low quiescent ICC (8μA typical), enabling direct interface with legacy TTL and modern 5V CMOS systems without level-shifting. The device operates with no internal feedback or clock division - pure edge-triggered storage with deterministic timing behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - ensures compatibility with standard 5V logic rails and tolerance to supply ripple. |
| Max Clock Frequency | 91MHz at –40°C to 85°C - supports high-speed register transfer in real-time control loops. |
| Output Drive | ±24mA - drives 15 F-series TTL loads directly, eliminating need for external buffers in fanout-critical paths. |
| Propagation Delay | tPLH/tPHL ≤12.6ns (85°C) - enables sub-10ns timing margins in synchronous state machines. |
| Input Compatibility | TTL-voltage compatible (VIH = 2V, VIL = 0.8V) - interfaces seamlessly with 74LS/74F families without pull-ups or translators. |
| ESD Rating | ±2000V HBM - meets industrial handling requirements without additional protection circuitry. |
| Power Dissipation Cap | Cpd = 37pF - enables accurate dynamic power estimation in high-frequency toggle scenarios. |
Pinout & Package
CD74ACT174M is packaged in a 16-pin SOIC (D package), 9.9mm × 6.0mm body size, with gull-wing leads and standard JEDEC MS-012AC footprint. Thermal resistance RθJA = 106.6°C/W enables operation up to 125°C ambient with moderate PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLR (Pin 1) | Asynchronous clear input | Active-low reset forcing all six Q outputs low immediately, independent of CLK state. |
| 1D–6D (Pins 3,4,6,11,13,14) | Data inputs | Independent D inputs for each of six flip-flops; sampled on CLK rising edge. |
| 1Q–6Q (Pins 2,5,7,10,12,15) | Q outputs | Non-inverted registered outputs corresponding to each D input; fanout-capable. |
| CLK (Pin 9) | Clock input | Single global clock driving all six flip-flops synchronously on positive edge. |
| VCC (Pin 16) | Power supply | Primary 4.5–5.5V supply connection; requires local 0.1μF bypass capacitor. |
| GND (Pin 8) | Ground reference | Common return path for all signals and power; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts standard 74LS logic thresholds (VIH ≥2V, VIL ≤0.8V), enabling drop-in replacement in mixed-logic systems. |
| SCR-latchup immunity | CMOS process and layout design prevent destructive latchup under transient overvoltage or ESD stress. |
| Balanced tPLH/tPHL | Propagation delays match within 0.1ns (typical), minimizing skew in parallel register banks. |
| Buffered inputs | Reduces capacitive loading on upstream drivers and improves noise rejection on long traces. |
| Low ICC quiescent current | 8μA typical at 5.5V - supports low-power standby modes in battery-backed control registers. |
Applications
| Industrial PLC Register Bank | Test Equipment Pattern Generator |
|---|---|
Use Scenario: Storing I/O status bits in programmable logic controller backplanes where deterministic timing and noise immunity are required. IC Role / Device Role / Timing Role: Hex D-flip-flop providing synchronized, glitch-free capture of 6-bit parallel sensor or actuator data on system clock edge. Use Value: ±24mA drive sustains signal integrity across 15cm ribbon cables; 91MHz clock support enables 100ns cycle time in high-speed scan logic. | Use Scenario: Generating precise multi-bit stimulus waveforms in automated test equipment for digital IC validation. IC Role / Device Role / Timing Role: Synchronous register holding pattern data for parallel output to DUT pins, clocked by precision function generator. Use Value: Matched tPLH/tPHL ≤12.6ns ensures <100ps inter-bit skew across all six outputs, critical for setup/hold compliance. |
| Legacy System Bus Interface | Motor Control State Latch |
Use Scenario: Interfacing microcontroller GPIOs to legacy 5V bus peripherals requiring TTL-level handshake signals. IC Role / Device Role / Timing Role: Level-translating register buffering address/data strobes between MCU and ISA-style peripheral controllers. Use Value: TTL-compatible inputs eliminate external pull-up resistors; 4.4V VOH at –24mA guarantees robust HIGH recognition by 74ALS receivers. | Use Scenario: Capturing safety-critical enable/disable commands in brushless motor gate driver sequencers. IC Role / Device Role / Timing Role: Asynchronous clear-enabled latch holding fault-reset states across power cycles and clock interruptions. Use Value: CLR pin allows immediate forced reset of all six control bits during overcurrent events, independent of clock availability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT174N | Same logic function, identical timing and drive specs; differs only in TI's part numbering convention (SN vs CD prefix) and qualification grade (commercial vs military-temp). | Identical functional use; SN74ACT174N rated for 0°C to 70°C only, not –55°C to 125°C. | Select CD74ACT174M for extended temperature range; SN74ACT174N suffices for commercial-grade board-level logic. |
| 74ACT174PC | Functionally identical, but manufactured by ON Semiconductor; same SOIC-16 package, 4.5–5.5V operation, and ±24mA drive. | Pinout and timing match exactly; minor differences in ICC (10μA vs 8μA) and thermal resistance (RθJA = 100°C/W vs 106.6°C/W). | Valid second-source option where TI supply continuity is constrained; verify layout thermal margin due to lower RθJA. |
Compared with SN74ACT174N and 74ACT174PC, CD74ACT174M provides guaranteed operation across –55°C to 125°C, tighter thermal resistance specification, and TI's full military-grade qualification pedigree - making it preferred for aerospace, defense, and harsh-environment industrial deployments.
Availability
CD74ACT174M is available at Aetrix Electronics and suitable for industrial PLCs, automated test equipment, legacy bus interfaces, and motor control sequencers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT174M 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions with over 90 years of innovation in industrial and automotive electronics.
The CDx4ACT174 family was engineered for high-reliability 5V logic systems requiring TTL compatibility, latchup immunity, and extended temperature operation - targeting industrial automation, avionics, and test instrumentation.
FAQ
What is the maximum operating temperature range for CD74ACT174M?
The CD74ACT174M is specified for operation from –55°C to +125°C ambient temperature, as confirmed in Section 5.3 of the TI datasheet. This extended range is enabled by TI's SCR-latchup-resistant CMOS process and validated thermal design, making CD74ACT174M suitable for under-hood automotive modules and industrial control cabinets without derating.
Does CD74ACT174M require external pull-up resistors on its inputs?
No, CD74ACT174M does not require external pull-up resistors because its inputs are TTL-voltage compatible with VIH = 2V minimum and VIL = 0.8V maximum. Unused inputs must still be tied to VCC or GND per Section 5.3, but this is for functional stability - not voltage threshold compliance - and can be done with direct connections, not resistors.
Can CD74ACT174M drive a 50-Ω transmission line directly?
Yes, CD74ACT174M can drive a 50-Ω transmission line directly: Section 5.5 confirms it delivers 3.85V VOH at –50mA and 1.65V VOL at 50mA (5.5V VCC, 125°C), satisfying 50-Ω line drive capability per TI's test methodology. This eliminates need for external line drivers in point-to-point high-speed interconnects.
Is CD74ACT174M pin-compatible with older 74LS174 devices?
CD74ACT174M is functionally and pinout-compatible with 74LS174 in SOIC-16 package, sharing identical pin assignments (CLR, CLK, D1–D6, Q1–Q6, VCC, GND). However, CD74ACT174M draws less power, offers higher speed (91MHz vs ~30MHz), and provides stronger drive (±24mA vs ±8mA), enabling direct upgrade without PCB changes.
What is the recommended bypass capacitor for CD74ACT174M?
Texas Instruments recommends a 0.1μF ceramic capacitor placed as close as possible to the VCC (Pin 16) and GND (Pin 8) pins of CD74ACT174M, per Section 8.1. For boards with multiple CD74ACT174M units or high-frequency switching, paralleling a 1μF capacitor improves low-frequency decoupling while the 0.1μF handles high-frequency transients.
CD74ACT174M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 80 MHz
- Max Propagation Delay @ V, Max CL:
- 14ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74ACT174M FAQ
1.How can I place an order for CD74ACT174M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT174M 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 CD74ACT174M reliable?
The price and inventory of CD74ACT174M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT174M is usually 5 days.
3.What payment methods are accepted for CD74ACT174M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT174M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT174M?
CD74ACT174M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT174M 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 CD74ACT174M?
For technical support, including CD74ACT174M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT174M requirements.
6.How does Aetrix verify that CD74ACT174M is sourced from the original manufacturer or authorized distributors?
All CD74ACT174M 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 CD74ACT174M meets industry standards.
7.What is the process for return or replacement of CD74ACT174M?
All CD74ACT174M units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT174M, 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 CD74ACT174M part is unused and in its original packaging.
Return procedure for CD74ACT174M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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