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Texas Instruments SN74AHC74MDREP
- Part No.:
- SN74AHC74MDREP
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74AHC74MDREP.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
SN74AHC74MDREP from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent asynchronous clear (CLR) and preset (PRE) inputs, operating across 2 V to 5.5 V supply range, rated for –55°C to 125°C extended temperature, and packaged in 14-pin SOIC (D). It delivers 170 MHz maximum clock frequency at 5 V, 8.5 ns propagation delay, and ±25 mA output drive - used in radiation-tolerant aerospace sequencers and high-reliability industrial control state machines.
For engineers reviewing the SN74AHC74MDREP datasheet, SN74AHC74MDREP pinout, SN74AHC74MDREP application, or SN74AHC74MDREP equivalent, key selection criteria include extended-temperature operation, EPIC process reliability, dual independent DFF functionality with asynchronous controls, and SOIC-14 compatibility for legacy board reuse in harsh-environment designs.
Technical Context
This device implements two independent edge-triggered D-type latches with active-low asynchronous set/reset, where PRE and CLR override clock and data inputs. Each flip-flop features non-overlapping output enable behavior and guaranteed setup/hold times as low as 3 ns (at 5 V) and 5 ns (at 3.3 V), supporting synchronous logic interfacing with microcontrollers and FPGAs.
The SN74AHC74MDREP uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) process, enabling latch-up immunity >250 mA per JESD17 and ESD protection >2000 V HBM. Its logic-level thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), ensuring robust noise margin across 2–5.5 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - supports direct interface with 2.5 V, 3.3 V, and 5 V logic families without level shifters. |
| Operating Temperature | –55°C to 125°C - qualified per JEDEC extended-temperature standards including HAST, temperature cycling, and bond intermetallic life testing. |
| Max Clock Frequency | 170 MHz at VCC = 5 V, CL = 15 pF - enables high-speed state sequencing in real-time control loops. |
| Propagation Delay | 4.6 ns (tPLH/tPHL, CLK→Q, VCC = 5 V) - ensures tight timing margins in synchronous pipeline stages. |
| Output Drive | ±8 mA at VCC = 5 V - sufficient to drive 10+ TTL loads or multiple AHC inputs without fanout limitation. |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V (at VCC = 5.5 V) - provides >1.3 V noise margin under worst-case supply and temperature conditions. |
| Power Dissipation Cap | Cpd = 32 pF - enables accurate dynamic power estimation at 1 MHz switching (ICC ≈ 16 µA typical). |
Pinout & Package
SN74AHC74MDREP is housed in a 14-pin SOIC (D) package with standard 1.27 mm pitch, 8.65 mm × 3.91 mm body size, and RoHS-compliant NiPdAu lead finish (MSL Level-1, 260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 14 | Functional I/O (1CLR, 1D, 1CLK, 1PRE, 1Q, 1Q̅, VCC) | First flip-flop control and output signals; 1Q and 1Q̅ provide complementary registered outputs. |
| 8, 9, 10, 11, 12, 13, 7 | Functional I/O (2CLR, 2D, 2CLK, 2PRE, 2Q, 2Q̅, GND) | Second independent flip-flop; GND reference plane critical for noise immunity in mixed-signal systems. |
| 1CLR / 2CLR | Asynchronous Reset Input | Active-low; forces Q = L / Q̅ = H regardless of clock or data - used for power-on initialization or fault recovery. |
| 1PRE / 2PRE | Asynchronous Set Input | Active-low; forces Q = H / Q̅ = L - enables deterministic startup states in safety-critical sequencers. |
| 1CLK / 2CLK | Clock Input | Positive-edge sensitive; triggering occurs at voltage threshold (~0.5×VCC), not dependent on slew rate - tolerant of slow-rising clocks. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent DFFs | Two fully isolated flip-flops share only VCC/GND rails - eliminates crosstalk in dual-channel timing paths. |
| Extended temperature support | –55°C to 125°C operation validated via biased 85/85, HAST, and thermal cycling - suitable for satellite payload and downhole electronics. |
| EPIC™ process technology | Implanted CMOS structure delivers >250 mA latch-up immunity and <1 µA ICC quiescent current - enhances system-level fault tolerance. |
| Scalable input thresholds | VIH/VIL track VCC (70%/30% ratios) - maintains consistent noise margin across supply variations in battery-powered or unregulated systems. |
| High-speed performance | 170 MHz fmax at 5 V enables use in 50+ MHz digital control loops without external clock division. |
Applications
| Aerospace Sequencing | Industrial PLC I/O Control |
|---|---|
|
Use Scenario: Synchronizing command execution and status sampling in radiation-hardened satellite telemetry subsystems. IC Role / Device Role / Timing Role: Dual DFF provides edge-aligned register staging for command decode and health-monitoring feedback loops. Use Value: Extended-temperature rating and EPIC process ensure reliable operation during orbital thermal cycling and single-event transient events. |
Use Scenario: Debouncing and synchronizing discrete sensor inputs (e.g., limit switches, emergency stops) in factory automation controllers. IC Role / Device Role / Timing Role: Asynchronous PRE/CLR enables immediate reset on fault detection; dual channels handle paired input/output pairs. Use Value: 4.6 ns propagation delay and 3 ns setup time allow integration into 200 ns PLC scan cycles without timing violation. |
| Military Data Acquisition | Downhole Oilfield Instrumentation |
|
Use Scenario: Capturing high-speed analog-to-digital converter (ADC) sample strobes and metadata timestamps in ruggedized field recorders. IC Role / Device Role / Timing Role: Positive-edge DFF latches ADC ready signals and channel ID bits with precise clock alignment. Use Value: 170 MHz max clock frequency supports sampling rates up to 85 MSPS when cascaded with fast ADCs. |
Use Scenario: Managing power sequencing and sensor calibration state in borehole pressure/temperature gauges exposed to 125°C ambient. IC Role / Device Role / Timing Role: Dual DFF stores calibration mode flags and enables timed activation of high-voltage drivers. Use Value: Qualified –55°C to 125°C operation and MSL-1 reflow rating ensure long-term reliability in sealed, oil-filled housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHC74DR | Commercial-grade (–40°C to 85°C), same pinout and electrical specs but no extended-temp qualification or EPIC process validation. | Limited to benign-environment industrial or test equipment; lacks HAST/temperature-cycle validation for mission-critical use. | Select SN74AHC74DR only if operating temperature stays within commercial range and radiation/long-life requirements are absent. |
| SN54AHC74J | Military QML-38534 Class V qualified, identical function and SOIC-14 package, but with full MIL-PRF-38534 screening and traceability. | Required for DoD programs mandating QML certification; includes additional burn-in, lot acceptance tests, and certificate-of-conformance reporting. | Choose SN54AHC74J when contractual compliance with MIL-STD-883 or QML-38534 is mandatory - not for cost-sensitive commercial reuse. |
Compared with SN74AHC74DR and SN54AHC74J, the SN74AHC74MDREP uniquely balances extended-temperature reliability, EPIC process robustness, and non-military procurement accessibility - making it optimal for space-qualified commercial satellites, avionics upgrades, and high-end industrial systems requiring proven 125°C endurance without full QML overhead.
Availability
SN74AHC74MDREP is available at Aetrix Electronics and suitable for aerospace sequencers, industrial PLC I/O modules, and downhole instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHC74MDREP 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, precision, and energy efficiency.
The SN74AHC74MDREP belongs to TI's enhanced-performance logic portfolio designed specifically for high-reliability applications in aerospace, defense, and industrial systems where extended temperature, latch-up immunity, and long-term supply stability are mandatory.
FAQ
What is the maximum operating temperature for SN74AHC74MDREP?
The SN74AHC74MDREP is qualified for continuous operation from –55°C to 125°C. This rating is verified through JEDEC-standard accelerated stress testing including biased 85/85, HAST, temperature cycling, and electromigration analysis - confirming suitability for engine bay, downhole, and spacecraft thermal environments. The SN74AHC74MDREP maintains full electrical specifications across this full range.
Does SN74AHC74MDREP support 2.5 V logic interfaces?
Yes, SN74AHC74MDREP operates down to 2 V VCC and supports 2.5 V logic systems. At VCC = 2.5 V, VIH is guaranteed ≥1.75 V and VIL ≤0.75 V, providing >1 V noise margin. Input thresholds scale linearly with supply, and output VOH/VOL remain rail-compatible - enabling direct connection to 2.5 V microcontrollers or FPGAs without level translation.
Is SN74AHC74MDREP pin-compatible with standard SN74AHC74 variants?
Yes, SN74AHC74MDREP uses the industry-standard 14-pin SOIC (D) package with identical pinout to commercial SN74AHC74DR and military SN54AHC74J devices. Pin functions, spacing, and mechanical dimensions match exactly - allowing drop-in replacement on existing PCBs designed for the SN74AHC74 family, provided thermal and reliability requirements align.
What does "EPIC™ process" mean for SN74AHC74MDREP reliability?
EPIC™ (Enhanced-Performance Implanted CMOS) is TI's proprietary fabrication process that implants dopants to suppress parasitic thyristor formation. For SN74AHC74MDREP, this yields >250 mA latch-up immunity per JESD17 and >2000 V HBM ESD protection - critical for systems exposed to EMI, power transients, or ionizing radiation. The SN74AHC74MDREP's EPIC process also enables stable parametric performance across –55°C to 125°C.
Can SN74AHC74MDREP replace SN74LS74 in legacy designs?
SN74AHC74MDREP can replace SN74LS74 in most functional roles but requires design review: it operates at 2–5.5 V (vs. LS's fixed 5 V), draws µA-level ICC (vs. mA-level LS), and has CMOS input thresholds. While pinout matches, SN74AHC74MDREP's higher speed (170 MHz vs. ~30 MHz) and lower drive (±8 mA vs. ±16 mA) may affect timing or fanout. Verify setup/hold and load conditions before substitution in SN74LS74-based SN74AHC74MDREP designs.
SN74AHC74MDREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 115 MHz
- Max Propagation Delay @ V, Max CL:
- 9.3ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 2 µA
- Input Capacitance:
- 2 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74AHC74MDREP FAQ
1.How can I place an order for SN74AHC74MDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC74MDREP 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 SN74AHC74MDREP reliable?
The price and inventory of SN74AHC74MDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC74MDREP is usually 5 days.
3.What payment methods are accepted for SN74AHC74MDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC74MDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC74MDREP?
SN74AHC74MDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC74MDREP 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 SN74AHC74MDREP?
For technical support, including SN74AHC74MDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC74MDREP requirements.
6.How does Aetrix verify that SN74AHC74MDREP is sourced from the original manufacturer or authorized distributors?
All SN74AHC74MDREP 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 SN74AHC74MDREP meets industry standards.
7.What is the process for return or replacement of SN74AHC74MDREP?
All SN74AHC74MDREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC74MDREP, 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 SN74AHC74MDREP part is unused and in its original packaging.
Return procedure for SN74AHC74MDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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