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Texas Instruments SN74AHC174DGVR
- Part No.:
- SN74AHC174DGVR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC174DGVR.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,996
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Product details
Overview
SN74AHC174DGVR from Texas Instruments is a hex D-type positive-edge-triggered flip-flop with asynchronous clear (CLR), designed for 2V–5.5V operation, featuring six independent storage elements, single-rail outputs, and guaranteed latch-up immunity >250 mA per JESD17 - used in synchronous data capture and register staging within digital control logic.
For engineers reviewing the SN74AHC174DGVR datasheet, SN74AHC174DGVR pinout, SN74AHC174DGVR application, or SN74AHC174DGVR equivalent, this page delivers verified functional behavior, package-specific timing at 3.3 V and 5 V, thermal resistance (RθJA = 120 °C/W), ESD ratings (HBM ±2000 V), and validated alternatives for buffer/register design reuse.
Technical Context
The SN74AHC174DGVR implements six edge-triggered D flip-flops sharing one global clock (CLK) and one active-low asynchronous clear (CLR). Each flip-flop transfers its D-input state to the corresponding Q-output on the rising edge of CLK, while CLR forces all Q outputs low regardless of CLK or D states.
It operates across industrial temperature range (–40°C to +85°C), supports mixed-voltage interfacing via 2V–5.5V VCC tolerance, and exhibits propagation delays as low as 4.1 ns (tPLH, VCC = 5 V, CL = 15 pF) and maximum operating frequency up to 240 MHz (CL = 15 pF, VCC = 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables direct interface with 3.3 V and 5 V logic families without level shifters. |
| Propagation Delay (tPLH/tPHL) | 4.1 ns (min, VCC = 5 V, CL = 15 pF) - supports high-speed register staging in pipeline stages. |
| Maximum Frequency (fmax) | 240 MHz (VCC = 5 V, CL = 15 pF) - suitable for fast serial-to-parallel conversion and pattern generation. |
| Output Drive (IOL/IOH) | ±8 mA (VCC = 5 V) - drives standard TTL loads and multiple CMOS inputs without buffering. |
| ESD Rating (HBM) | ±2000 V - meets JEDEC JS-001 for robust handling in automated assembly environments. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, motor drive, and instrumentation applications. |
| Power Dissipation Capacitance (Cpd) | 15.2 pF - enables accurate dynamic power estimation at 10 MHz switching frequency. |
Pinout & Package
TSSOP-16 (PW) package: 5 mm × 6.4 mm body size, 1.2 mm max height, lead pitch 0.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CLR) | Asynchronous Clear Input | Active-low global reset - forces all six Q outputs low independently of clock edge. |
| 2 (1Q) | Output | Non-inverted output of first flip-flop - synchronized to CLK↑, reflects 1D state after setup/hold timing. |
| 3 (1D) | Data Input | Input for first flip-flop - must be stable ≥4.5 ns before CLK↑ (VCC = 5 V) to avoid metastability. |
| 4 (2D) | Data Input | Input for second flip-flop - electrically identical to 1D; no internal coupling between D inputs. |
| 5 (2Q) | Output | Non-inverted output of second flip-flop - matches timing specs of 1Q under identical load conditions. |
| 6 (3D) | Data Input | Input for third flip-flop - supports independent data loading per stage in shift-register configurations. |
| 7 (3Q) | Output | Non-inverted output of third flip-flop - usable as feedback or next-stage input in multi-cycle logic. |
| 8 (GND) | Ground Reference | Primary return path for all internal logic and output drivers - requires low-inductance connection to PCB ground plane. |
| 9 (CLK) | Clock Input | Positive-edge-triggered global clock - all six flip-flops sample D inputs simultaneously on rising transition. |
| 10 (4Q) | Output | Non-inverted output of fourth flip-flop - maintains same DC and AC specs as other Q outputs. |
| 11 (4D) | Data Input | Input for fourth flip-flop - supports full 6-bit parallel load capability when used with external bus. |
| 12 (5Q) | Output | Non-inverted output of fifth flip-flop - enables compact 6-bit status latching in sensor interface circuits. |
| 13 (5D) | Data Input | Input for fifth flip-flop - isolated from other D inputs; no internal fan-out limitation. |
| 14 (6D) | Data Input | Input for sixth flip-flop - completes full hex register functionality; all D inputs accept 0–5.5 V valid logic levels. |
| 15 (6Q) | Output | Non-inverted output of sixth flip-flop - final stage output usable for interrupt assertion or bus enable control. |
| 16 (VCC) | Supply Voltage | Primary power rail - requires local 0.1 µF ceramic bypass capacitor placed ≤2 mm from pin to suppress high-frequency noise. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V–5.5 V operation allows interoperability with legacy 5 V systems and modern 3.3 V microcontrollers. |
| Asynchronous Clear | Dedicated active-low CLR pin resets all six outputs simultaneously - critical for deterministic power-on initialization. |
| Latch-Up Immunity | Exceeds 250 mA per JESD17 - ensures robustness against transient current surges in noisy industrial environments. |
| Low Propagation Skew | tsk(o) ≤ 1.2 ns (CL = 50 pF) - guarantees tight timing alignment across all six outputs for synchronous sampling. |
| CMOS Input Compatibility | VIH/VIL thresholds scale with VCC - eliminates need for external pull-ups/pull-downs in mixed-voltage designs. |
Applications
| Buffer/Storage Registers | Shift Registers |
|---|---|
Use Scenario: Holding 6-bit configuration data from an MCU GPIO port during peripheral reconfiguration cycles. IC Role / Device Role / Timing Role: Hex D flip-flop acting as parallel-load storage register, capturing data on CLK↑ with simultaneous CLR-driven reset. Use Value: Eliminates need for discrete latches or larger CPLDs by providing six synchronized, independently controllable storage bits in one TSSOP-16 package. |
Use Scenario: Converting serial command streams from UART into parallel 6-bit control words for LED driver ICs. IC Role / Device Role / Timing Role: Cascaded stage in a 6-bit shift register - Q6 feeds next stage's D1, CLK synchronizes bit advancement. Use Value: Enables compact serial-to-parallel conversion with predictable 6-clock-cycle latency and no external timing components. |
| Pattern Generators | Digital Control Logic |
Use Scenario: Generating fixed test patterns (e.g., 0x3F, 0x0F) for validating FPGA I/O banks during production test. IC Role / Device Role / Timing Role: Preloaded register feeding combinatorial logic - D inputs tied to fixed voltages, CLK toggled to cycle through static outputs. Use Value: Provides deterministic, repeatable stimulus generation without firmware or memory access overhead. |
Use Scenario: Capturing real-time status flags (e.g., fault signals from six motor phases) for centralized monitoring by a safety controller. IC Role / Device Role / Timing Role: Synchronous sampling element - all six inputs sampled on common CLK edge, outputs held stable until next cycle. Use Value: Ensures atomic snapshot of distributed system state, preventing race conditions in time-critical diagnostics. |
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 |
|---|---|---|---|
| SN74AHCT174PW | 5 V-only operation (4.5–5.5 V); TTL-compatible input thresholds (VIH = 2 V min). | Better suited for legacy 5 V-only systems with TTL-level drivers; not compatible with 3.3 V microcontroller outputs without level shifting. | Select when interfacing exclusively with 5 V TTL sources and requiring guaranteed VIH compatibility at VCC = 5 V. |
| 74LVC174PW | 1.65–3.6 V supply range; lower propagation delay (3.2 ns typ at 3.3 V); higher drive (±24 mA). | Optimized for 3.3 V and sub-3 V domains; unsuitable for 5 V systems due to absolute max rating of 3.6 V on VCC and I/O. | Select for battery-powered or low-voltage embedded designs where 5 V operation is unnecessary and speed/power trade-offs favor LVC family. |
Compared with SN74AHC174DGVR, SN74AHCT174PW offers stronger 5 V input noise immunity but sacrifices voltage flexibility, while 74LVC174PW delivers superior speed and drive in 3.3 V systems but cannot operate at 5 V - making SN74AHC174DGVR the only option spanning both domains without external level translation.
Availability
SN74AHC174DGVR is available at Aetrix Electronics and suitable for industrial control panels, motor drive interface modules, and programmable logic carrier boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHC174DGVR 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 logic solutions, with over 90 years of innovation in high-reliability digital building blocks.
The SN74AHC174DGVR belongs to TI's Advanced High-Speed CMOS (AHC) logic family, engineered for low-power, high-noise-immunity digital interfacing in industrial, automotive, and communications equipment.
FAQ
What is the maximum clock frequency supported by the SN74AHC174DGVR?
The SN74AHC174DGVR supports up to 240 MHz maximum operating frequency when loaded with 15 pF and powered at 5 V ±0.5 V, as specified in Section 5.9 of the datasheet. At 3.3 V ±0.3 V and 15 pF load, the maximum frequency drops to 170 MHz. These values assume proper PCB layout, decoupling, and signal integrity - actual system-level performance may vary based on trace length and termination.
Does the SN74AHC174DGVR require external pull-up resistors on unused inputs?
Yes - all unused inputs of the SN74AHC174DGVR must be tied to either VCC or GND to prevent floating states that could cause excessive current draw or erratic output behavior. This requirement is explicitly stated in Section 5.3 (Recommended Operating Conditions) and reinforced in Application Note "Implications of Slow or Floating CMOS Inputs" referenced in the datasheet.
Can the SN74AHC174DGVR operate reliably at 2.5 V supply voltage?
Yes - the SN74AHC174DGVR is fully specified for operation from 2 V to 5.5 V, including 2.5 V. At 2.5 V, it delivers guaranteed VOL ≤ 0.1 V and VOH ≥ 2.3 V under light loads, with propagation delays increasing to ~11 ns (tPLH, CL = 15 pF), and maximum frequency reduced to approximately 80 MHz. All timing and DC parameters remain valid across this range per Section 5.3.
Is the SN74AHC174DGVR pin-compatible with other TSSOP-16 logic devices?
No - pin compatibility is not guaranteed across logic families or functions. The SN74AHC174DGVR has a specific pinout defined in Figure 4-1 and Table 4-1 of its datasheet, including dedicated CLR, CLK, six D inputs, six Q outputs, VCC, and GND. Substituting with another TSSOP-16 device (e.g., SN74AHC595) would require PCB redesign due to differing pin assignments and functional architecture.
What thermal derating applies to the SN74AHC174DGVR in its TSSOP-16 (PW) package?
The SN74AHC174DGVR in PW package has a junction-to-ambient thermal resistance (RθJA) of 135.9 °C/W, as measured per JEDEC standards. At 85°C ambient and 5 V operation with typical switching activity, power dissipation remains below 100 mW - resulting in junction temperature rise of <14°C above ambient. No forced airflow or heatsinking is required for standard industrial use cases.
SN74AHC174DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 16-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 180 MHz
- Max Propagation Delay @ V, Max CL:
- 9.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 1.7 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TVSOP
SN74AHC174DGVR FAQ
1.How can I place an order for SN74AHC174DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC174DGVR 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 SN74AHC174DGVR reliable?
The price and inventory of SN74AHC174DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC174DGVR is usually 5 days.
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SN74AHC174DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC174DGVR 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 SN74AHC174DGVR?
For technical support, including SN74AHC174DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC174DGVR requirements.
6.How does Aetrix verify that SN74AHC174DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AHC174DGVR 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 SN74AHC174DGVR meets industry standards.
7.What is the process for return or replacement of SN74AHC174DGVR?
All SN74AHC174DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC174DGVR, 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 SN74AHC174DGVR part is unused and in its original packaging.
Return procedure for SN74AHC174DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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