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Texas Instruments SN74LVC374ANS
- Part No.:
- SN74LVC374ANS
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74LVC374ANS.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
SN74LVC374ANS from ON Semiconductor is a low-voltage CMOS octal D-type flip-flop with 3-state non-inverting outputs, 5 V-tolerant I/O, and 1.2–3.6 V supply operation. It features edge-triggered storage, common buffered clock (CP) and output enable (OE), 24 mA output drive, and near-zero static ICC (10 µA). It is used in bus interface and data latching applications in mixed-voltage digital systems.
For engineers reviewing the SN74LVC374ANS datasheet, SN74LVC374ANS pinout, SN74LVC374ANS application, or SN74LVC374ANS equivalent, key selection factors include 5 V-tolerant input compatibility, 3-state output control timing (ten = 3.0 ns typ at 3.3 V), propagation delay (tpd = 3.3 ns typ), setup/hold times (tsu = 2.0 ns, th = 1.5 ns), and TSSOP-20 package thermal resistance (θJA = 110.7 °C/W).
Technical Context
The SN74LVC374ANS implements eight independent D-type flip-flops sharing a single LOW-to-HIGH edge-triggered clock (CP) and a common active-low output enable (OE). Each flip-flop samples its Dn input on the CP rising edge and holds the value until the next valid clock transition. OE controls all eight outputs simultaneously: when OE is LOW, outputs reflect stored Q states; when OE is HIGH, all outputs enter high-impedance state without affecting internal register operation.
This device supports live insertion and withdrawal due to IOFF specification (high-impedance when VCC = 0 V) and operates across industrial temperature range (−40°C to +125°C). Its 5.5 V absolute maximum input voltage rating enables safe interfacing with legacy 5 V TTL logic while powered from 1.65–3.6 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.2 V to 3.6 V - Enables direct integration into modern low-power 1.8 V and 3.3 V systems without level-shifting. |
| Input Voltage Max | 5.5 V - Allows direct connection to 5 V logic outputs without external clamping or translation. |
| Output Drive | ±24 mA - Sufficient to drive standard 50 Ω transmission lines or multiple CMOS inputs under load. |
| tpd (CP→Q) | 3.3 ns typical at VCC = 3.0–3.6 V - Supports >120 MHz operation in synchronous bus applications. |
| tsu / th | 2.0 ns / 1.5 ns at VCC = 3.0–3.6 V - Tight timing margins simplify high-speed PCB layout and timing closure. |
| ICC (Static) | 10 µA max - Minimizes quiescent power in always-on or battery-backed subsystems. |
| IOFF Leakage | ±10 µA max at VCC = 0 V - Ensures true isolation during hot-swap or power sequencing events. |
Pinout & Package
TSSOP-20 package (Case 948E), 0.65 mm pitch, 6.5 mm × 4.4 mm body, 1.2 mm max height, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D0–D7 Data Inputs | Asynchronous data inputs sampled on CP rising edge; 5 V tolerant, TTL-compatible thresholds. |
| 9 | CP Clock Pulse Input | Edge-triggered clock; LOW-to-HIGH transition latches all D inputs simultaneously. |
| 10 | OE Output Enable | Active-low control: OE = LOW enables outputs; OE = HIGH forces all O0–O7 into high-Z state. |
| 11, 12, 13, 14, 15, 16, 17, 18 | O0–O7 Outputs | 3-state non-inverting outputs; each reflects corresponding flip-flop Q state when OE = LOW. |
| 19 | VCC | Positive supply rail (1.2–3.6 V); powers internal logic and output drivers. |
| 20 | GND | Ground reference for all I/O and internal circuitry; must be low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V–tolerant I/O | Enables seamless interoperation between 3.3 V/2.5 V/1.8 V logic domains and legacy 5 V peripherals or microcontrollers. |
| IOFF protection | Guarantees high-impedance I/O when VCC = 0 V, preventing back-driving and enabling hot-plug capability in modular systems. |
| Low dynamic power | CPD = 15.4 pF per flip-flop at 3.0–3.6 V enables predictable dynamic power estimation (PD = CPD × VCC² × f). |
| High noise immunity | TTL-compatible input thresholds and 24 mA drive reduce susceptibility to switching noise in dense PCB layouts. |
| Industrial temp range | −40°C to +125°C operation supports deployment in automotive engine control units, industrial PLCs, and outdoor telecom equipment. |
Applications
| Bus Interface Logic | Data Acquisition Buffering |
|---|---|
Use Scenario: Isolating and latching parallel address/data bus signals between a 3.3 V FPGA and 5 V peripheral ASIC in an embedded controller. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as a synchronized, 3-state bus latch; CP aligns sampling to system clock edge, OE decouples bus segments during arbitration. Use Value: Eliminates need for discrete level shifters while maintaining timing integrity and reducing BOM count by consolidating eight channels in one TSSOP-20 package. | Use Scenario: Capturing 8-bit sensor readings from analog-to-digital converters in a programmable logic controller with mixed-voltage I/O. IC Role / Device Role / Timing Role: Edge-triggered data register holding ADC output bits until read by a 1.8 V microcontroller via shared bus. Use Value: Provides deterministic setup/hold timing (tsu = 2.0 ns, th = 1.5 ns) and 5 V tolerance for direct ADC interface, avoiding metastability risks. |
| Memory Address Latching | Industrial I/O Expansion |
Use Scenario: Latching lower-order address bits for SRAM or flash memory access in a 3.3 V microprocessor-based HMI panel. IC Role / Device Role / Timing Role: Non-inverting D-type latch synchronizing address transitions to CPU clock; 3-state outputs prevent contention during memory read/write cycles. Use Value: Delivers 3.3 ns typical propagation delay and 24 mA drive to meet tight SRAM access timing windows without added buffers. | Use Scenario: Expanding GPIO count on a 2.5 V industrial MCU by interfacing with 5 V-rated relay driver ICs and optocouplers. IC Role / Device Role / Timing Role: Bidirectional bus buffer with direction controlled by OE; isolates MCU I/O from higher-voltage field-side circuits. Use Value: IOFF protection ensures safe hot-swap of I/O modules; 5.5 V input rating accommodates optocoupler output swings without clamping diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC374APW,118 | TSSOP-20 package, identical electrical specs, same pinout, but NXP variant with different marking and tape/reel packaging. | No functional difference; suitable for drop-in replacement where NXP sourcing is preferred or required by procurement policy. | Select 74LVC374APW,118 only if dual-sourcing or specific distributor availability dictates NXP branding. |
| SN74LVCH16374ADGGR | 16-bit version in 48-pin TSSOP; includes bus-hold circuitry and higher drive (±24 mA), but requires two devices for octal function and occupies more board area. | Used in wider data paths (e.g., 16-bit microcontrollers); not pin-compatible and introduces unnecessary complexity for 8-bit use cases. | Choose SN74LVCH16374ADGGR only when scaling to 16-bit bus width or requiring integrated bus-hold functionality. |
Compared with SN74LVC374ANS, 74LVC374APW,118 offers identical timing, voltage, and pinout - making it a true functional and mechanical substitute - whereas SN74LVCH16374ADGGR trades compactness and simplicity for expanded bit width and bus-hold, increasing cost and layout overhead for pure octal needs.
Availability
SN74LVC374ANS is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics modules, and embedded test equipment requiring stable component supply and long-term lifecycle support.
Supply support for SN74LVC374ANS 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and communications markets.
The 74LVC logic family, including SN74LVC374ANS, was designed for low-voltage, high-speed digital interfacing in mixed-supply systems - prioritizing 5 V tolerance, minimal power consumption, and robust signal integrity across extended temperature ranges.
FAQ
What is the maximum operating frequency of the SN74LVC374ANS at 3.3 V supply?
The SN74LVC374ANS supports up to 150 MHz maximum frequency at VCC = 3.0–3.6 V over the commercial temperature range (−40°C to +85°C), and 120 MHz at full industrial range (−40°C to +125°C), as specified in the AC Electrical Characteristics table. This performance is enabled by its 3.3 ns typical propagation delay and tight 2.0 ns setup time.
Does the SN74LVC374ANS require external pull-up resistors on its outputs?
No, the SN74LVC374ANS does not require external pull-up resistors on its outputs. Its 3-state outputs are actively driven HIGH or LOW when enabled (OE = LOW), and present true high-impedance (not weak pull-up/down) when disabled (OE = HIGH). External pull-ups are only needed if a defined logic level is required during high-Z periods - which is outside the device's intended operation.
Can the SN74LVC374ANS be used with a 1.2 V supply voltage?
Yes, the SN74LVC374ANS is fully specified to operate down to 1.2 V VCC. At this voltage, DC parameters such as VIH/VIL thresholds scale accordingly (e.g., VIH = 1.08 V min), and AC performance adjusts (e.g., tpd ≤ 16.0 ns, fmax = 100 MHz). All functionality - including 5 V-tolerant inputs and IOFF protection - remains valid across the full 1.2–3.6 V range.
How does the IOFF feature of the SN74LVC374ANS improve system reliability?
The IOFF feature guarantees that all inputs and outputs enter a high-impedance state when VCC = 0 V, preventing current backflow from live buses into a powered-down device. In systems with hot-swap capability or staged power sequencing - such as modular I/O racks - this eliminates risk of latch-up, bus contention, or damage to upstream drivers, directly enhancing field-replaceable unit (FRU) safety and system uptime.
Is the SN74LVC374ANS pin-compatible with older 74HC374 or 74ACT374 devices?
No, the SN74LVC374ANS is not pin-compatible with 74HC374 or 74ACT374. While all three share the same TSSOP-20 footprint and logical function, the SN74LVC374ANS has different pin assignments: D0–D7 occupy pins 1–8, CP is pin 9, OE is pin 10, and O0–O7 are pins 11–18 - whereas 74HC374 places OE at pin 1 and CP at pin 11. Direct substitution would cause functional failure without PCB redesign.
SN74LVC374ANS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVC374ANS FAQ
1.How can I place an order for SN74LVC374ANS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC374ANS 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 SN74LVC374ANS reliable?
The price and inventory of SN74LVC374ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC374ANS is usually 5 days.
3.What payment methods are accepted for SN74LVC374ANS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC374ANS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC374ANS?
SN74LVC374ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC374ANS 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 SN74LVC374ANS?
For technical support, including SN74LVC374ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC374ANS requirements.
6.How does Aetrix verify that SN74LVC374ANS is sourced from the original manufacturer or authorized distributors?
All SN74LVC374ANS 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 SN74LVC374ANS meets industry standards.
7.What is the process for return or replacement of SN74LVC374ANS?
All SN74LVC374ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC374ANS, 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 SN74LVC374ANS part is unused and in its original packaging.
Return procedure for SN74LVC374ANS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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