My Inquiry
My Account
NXP Semiconductors 74LVC821ABQ,118
- Part No.:
- 74LVC821ABQ,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
74LVC821ABQ,118.pdf
- Description:
- IC FF D-TYPE SNGL 10BIT 24DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVC821ABQ,118 from NXP Semiconductors (formerly Philips) is a 10-bit positive-edge-triggered D-type flip-flop with 5 V tolerant inputs/outputs, 3-state bus interface capability, and operation across 1.2 V to 3.6 V supply. It features common clock (CP) and output enable (OE), supports mixed-voltage translation between 3.3 V and 5 V systems, and delivers 200 MHz max clock frequency at 3.3 V for high-speed data latching in memory buffers and address/data registers.
For engineers reviewing the 74LVC821ABQ,118 datasheet, 74LVC821ABQ,118 pinout, 74LVC821ABQ,118 application, or 74LVC821ABQ,118 equivalent, this device serves as a low-power, voltage-flexible register for bus-hold, level-shifting, and synchronous data capture in industrial control backplanes, FPGA I/O expansion, and legacy 5 V peripheral interfacing.
Technical Context
The 74LVC821ABQ,118 implements ten independent D-type latches triggered on the LOW-to-HIGH transition of CP, with setup/hold timing validated down to 1.2 V supply. Its 3-state outputs are controlled solely by OE (active LOW), decoupled from flip-flop state retention - enabling transparent bus arbitration without disturbing stored data.
Input tolerance up to 5.5 V and output drive capability into 5 V loads allow direct connection to legacy TTL or 5 V CMOS logic without external level shifters. The device complies with JEDEC JESD8-B and operates over −40 °C to +125 °C, supporting automotive under-hood and industrial motor-control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 10-bit positive-edge-triggered D-type register with 3-state outputs |
| Supply Voltage Range | 1.2 V to 3.6 V - enables operation in ultra-low-voltage microcontroller I/O domains and standard 3.3 V logic rails |
| Input/Output Voltage Tolerance | 5.5 V - permits safe interfacing with 5 V logic families without clamping diodes or external protection |
| Max Clock Frequency | 200 MHz at VCC = 3.3 V - supports high-throughput data capture in real-time control loops and burst-mode memory interfaces |
| Propagation Delay (CP→Q) | 3.7 ns typical at VCC = 3.3 V - ensures tight timing margins in synchronous bus designs with sub-5 ns skew budgets |
| 3-State Enable/Disable Time | 3.5 ns / 3.0 ns typical at VCC = 3.3 V - minimizes bus turnaround latency during multi-master arbitration |
| Operating Temperature | −40 °C to +125 °C - qualified for extended-temperature industrial and automotive applications |
Pinout & Package
DHVQFN24 package: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 24 terminals; body dimensions 3.5 × 5.5 × 0.85 mm; exposed die pad for thermal dissipation (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output enable input | Active LOW control for all 10 outputs - asserts high-impedance state without affecting internal register contents |
| 2–11 (D0–D9) | Data inputs | Individual asynchronous data inputs for each flip-flop - accepts signals up to 5.5 V regardless of VCC |
| 12 (GND) | Ground reference | Primary return path for supply current and signal references; connects to PCB ground plane |
| 13 (CP) | Clock input | Edge-sensitive input triggering simultaneous latching of all D inputs on LOW-to-HIGH transition |
| 14–23 (Q0–Q9) | 3-state outputs | Registered outputs with 5 V tolerant drive - enter high-Z when OE = HIGH, retain logic state otherwise |
| 24 (VCC) | Power supply | Core supply rail (1.2–3.6 V); powers internal logic and output buffers; requires local 100 nF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| 5 V tolerant I/O | Enables direct connection to 5 V logic without level translators or series resistors in mixed-voltage systems |
| Flow-through pin-out architecture | Minimizes PCB trace length and crosstalk by aligning Dn and Qn pins on opposite sides of the package |
| Independent register and 3-state buffer operation | Allows data retention during bus contention - OE can be toggled without corrupting stored values |
| Wide temperature range (−40 °C to +125 °C) | Supports deployment in engine control units, power inverters, and outdoor industrial gateways |
| JEDEC JESD8-B compliance | Guarantees interoperability with industry-standard low-voltage CMOS logic families and test methodologies |
Applications
| Industrial PLC Backplane Interface | FPGA I/O Expansion Buffer |
|---|---|
Use Scenario: Interfacing 3.3 V FPGA I/O banks with legacy 5 V sensor modules and actuator drivers on a shared parallel bus. IC Role / Device Role / Timing Role: Synchronous data latch and bidirectional voltage translator - captures FPGA outputs on CP edge and presents them as 5 V–compatible signals to peripherals. Use Value: Eliminates discrete level-shifter ICs and reduces BOM count while maintaining 200 MHz throughput and deterministic timing alignment across 10 data lines. | Use Scenario: Extending limited FPGA GPIO count to drive multiple 8-bit parallel displays, ADC/DAC interfaces, or memory-mapped peripherals. IC Role / Device Role / Timing Role: Parallel output expander with 3-state control - holds display data stable during refresh cycles and releases bus for other peripherals via OE. Use Value: Provides 10-bit synchronized output staging with sub-4 ns propagation delay, enabling precise timing-critical pixel or sample updates without FPGA resource overhead. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
Use Scenario: Latching diagnostic command words from a 3.3 V microcontroller to control 5 V solenoid drivers and relay arrays in under-hood ECUs. IC Role / Device Role / Timing Role: Robust command register with extended temperature operation - stores safety-critical actuation states and isolates MCU from noisy load switching transients. Use Value: Delivers guaranteed operation at +125 °C ambient and withstands 5.5 V input surges per ISO 7637-2, reducing need for external TVS protection on control lines. | Use Scenario: Generating repeatable, jitter-free digital stimulus patterns for IC functional testing across multiple DUT channels simultaneously. IC Role / Device Role / Timing Role: Precision timing register - synchronizes pattern edges to system clock with <1.0 ns output skew between Q0–Q9 outputs. Use Value: Enables sub-nanosecond inter-channel timing correlation required for high-speed serial link margin testing and DDR PHY validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC821APWRE4 | TSSOP24 package (4.4 mm width); identical electrical specs and pinout; slightly higher thermal resistance (4.5 mW/K derating above 60 °C) | Better suited for space-constrained PCBs where DHVQFN reflow compatibility is not required | Select when board assembly uses standard SMT pick-and-place with TSSOP support and thermal budget allows lower power dissipation |
| 74ALVC821BQ,118 | Same DHVQFN24 package; higher drive strength (±24 mA vs ±12 mA at 3.0 V); identical timing and voltage specs | Preferred for driving heavier capacitive loads (>50 pF) or longer traces in high-noise industrial backplanes | Select when output loading exceeds 50 pF or when robustness against EMI-induced glitches is critical |
Compared with SN74LVC821APWRE4 and 74ALVC821BQ,118, the 74LVC821ABQ,118 offers optimal thermal performance in compact layouts due to its exposed thermal pad, while maintaining lowest quiescent current (≤10 µA) for battery-backed systems - making it ideal for always-on monitoring nodes requiring long-term reliability.
Availability
74LVC821ABQ,118 is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body control modules, and FPGA-based test equipment requiring stable component supply, extended temperature qualification, and 5 V tolerant I/O interoperability.
Supply support for 74LVC821ABQ,118 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
NXP Semiconductors is a global semiconductor leader delivering high-performance analog, logic, and interface solutions for automotive, industrial, and IoT applications.
The 74LVC821ABQ,118 belongs to NXP's LVC logic family - engineered for low-voltage operation, mixed-signal compatibility, and robust noise immunity in harsh electromagnetic environments.
FAQ
What is the maximum operating supply voltage for the 74LVC821ABQ,118?
The 74LVC821ABQ,118 has an absolute maximum supply voltage (VCC) of +6.5 V, but its recommended operating range is strictly 1.2 V to 3.6 V. Operation outside this range may cause excessive current draw or timing violations. The 74LVC821ABQ,118 maintains full functionality and timing compliance only within the 1.2–3.6 V window, with optimal speed and power trade-offs at 3.3 V.
Does the 74LVC821ABQ,118 support true 5 V logic level translation?
Yes, the 74LVC821ABQ,118 supports bidirectional 5 V translation: inputs tolerate up to 5.5 V regardless of VCC, and outputs drive 5 V loads in 3-state mode. This allows the 74LVC821ABQ,118 to sit between 3.3 V controllers and 5 V peripherals without external components, provided VCC remains within 1.2–3.6 V and output loading stays within ±24 mA limits.
What is the function of the exposed thermal pad on the DHVQFN24 package of the 74LVC821ABQ,118?
On the 74LVC821ABQ,118 DHVQFN24 package, the exposed thermal pad is electrically isolated and bonded to the die substrate using conductive material solely for heat dissipation. It must be soldered to a large PCB copper pour for thermal management but cannot be used as a supply or signal pin. The 74LVC821ABQ,118 datasheet explicitly prohibits connecting this pad to VCC or GND.
Can the 74LVC821ABQ,118 operate reliably at +125 °C ambient temperature?
Yes, the 74LVC821ABQ,118 is fully specified and tested for continuous operation from −40 °C to +125 °C ambient. Its DHVQFN24 package includes thermal derating of 4.5 mW/K above 60 °C, and all DC and AC parameters - including propagation delay, setup/hold times, and output drive - are guaranteed across this full range. This makes the 74LVC821ABQ,118 suitable for under-hood automotive and high-temperature industrial deployments.
How does the 3-state output control work on the 74LVC821ABQ,118?
The 74LVC821ABQ,118 uses pin 1 (OE) as an active LOW output enable. When OE = LOW, all ten Q outputs reflect the registered D-input states. When OE = HIGH, all Q outputs enter high-impedance (Z) state - independent of CP activity or internal flip-flop values. Critically, OE transitions do not affect stored data, allowing the 74LVC821ABQ,118 to maintain register integrity during bus arbitration.
74LVC821ABQ,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Clock Frequency:
- 200 MHz
- Max Propagation Delay @ V, Max CL:
- 7.3ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-DHVQFN (5.5x3.5)
74LVC821ABQ,118 FAQ
1.How can I place an order for 74LVC821ABQ,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC821ABQ,118 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 74LVC821ABQ,118 reliable?
The price and inventory of 74LVC821ABQ,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC821ABQ,118 is usually 5 days.
3.What payment methods are accepted for 74LVC821ABQ,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC821ABQ,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC821ABQ,118?
74LVC821ABQ,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC821ABQ,118 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 74LVC821ABQ,118?
For technical support, including 74LVC821ABQ,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC821ABQ,118 requirements.
6.How does Aetrix verify that 74LVC821ABQ,118 is sourced from the original manufacturer or authorized distributors?
All 74LVC821ABQ,118 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 74LVC821ABQ,118 meets industry standards.
7.What is the process for return or replacement of 74LVC821ABQ,118?
All 74LVC821ABQ,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC821ABQ,118, 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 74LVC821ABQ,118 part is unused and in its original packaging.
Return procedure for 74LVC821ABQ,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC821ABQ,118 Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
