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Nexperia USA Inc. 74LVC161BQ,115
- Part No.:
- 74LVC161BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74LVC161BQ,115.pdf
- Description:
- IC BINARY COUNTER 4-BIT 16DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,617
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Product details
Overview
74LVC161BQ,115 from Nexperia is a synchronous presettable 4-bit binary counter with asynchronous master reset (MR), internal look-ahead carry, and dual count-enable inputs (CEP/CET) for cascading. It operates from 1.2 V to 3.6 V, supports 3.3 V/5 V mixed-voltage interfacing via overvoltage-tolerant inputs (up to 5.5 V), and delivers terminal count (TC) pulse width ≈ Q0 HIGH duration for reliable multi-stage counting in industrial timing and control logic.
For engineers reviewing the 74LVC161BQ,115 datasheet, 74LVC161BQ,115 pinout, 74LVC161BQ,115 application, or 74LVC161BQ,115 equivalent, this device serves as a drop-in-ready, temperature-stable (–40 °C to +125 °C) building block for synchronous digital counters requiring precise parallel load, asynchronous clear, and low-skew (≤1.5 ns) output transitions in space-constrained PCB layouts.
Technical Context
The 74LVC161BQ implements four edge-triggered D-type flip-flops clocked synchronously on the positive-going edge of CP. Its parallel load function activates when PE is LOW, overriding CEP/CET state and loading D0–D3 regardless of count-enable status. The TC output asserts HIGH only when CET = HIGH and all outputs Q0–Q3 = HIGH (1510), enabling direct feed-forward to next-stage enable.
Asynchronous MR forces Q0–Q3 LOW independently of CP, PE, CEP, or CET. Schmitt-trigger inputs tolerate slow-rising/falling signals, while overvoltage-tolerant I/O allows safe interfacing with 5 V logic driving into 3.3 V supply domains - critical for legacy-to-modern system integration without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.2 V to 3.6 V - enables operation in ultra-low-power microcontroller subsystems and battery-backed logic. |
| Input voltage tolerance | Up to 5.5 V - permits direct connection to 5 V TTL/CMOS outputs without external clamping or translation. |
| Max operating frequency | 150 MHz at VCC = 3.3 V - supports high-speed counting in real-time control loops and data acquisition clocks. |
| Propagation delay (CP to Qn) | 1.5 ns (min) to 9.5 ns (max) at VCC = 3.0–3.6 V - ensures tight timing margins in synchronous state machines. |
| Output skew | ≤1.5 ns - guarantees deterministic alignment across Q0–Q3 for glitch-free decoding and address generation. |
| Operating temperature | –40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and outdoor telecom applications. |
| ESD protection | HBM >2000 V, CDM >1000 V - enhances robustness during automated assembly and field deployment. |
Pinout & Package
DHVQFN16 package (SOT763-1): 2.5 mm × 3.5 mm × 0.85 mm body, 16-terminal no-lead quad flat design with exposed thermal pad; optimized for high-density routing and thermal performance in compact embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for logic and power currents; thermal pad must be floating or connected to GND for optimal thermal dissipation. |
| 2 (CEP) | Count enable parallel | Enables counting only when HIGH; used with CET to gate clock propagation through the counter chain. |
| 3 (CET) | Count enable carry | Feeds forward to TC output; TC goes HIGH only if CET = HIGH and Q0–Q3 = HHHH - essential for ripple-carry cascade timing. |
| 4 (D3) | Data input MSB | Loads parallel value into Q3 on rising CP when PE = LOW; supports presetting any 4-bit value (0–15). |
| 5 (Q3) | Output MSB | Most significant bit of 4-bit binary count; toggles every 8 clocks; used for divide-by-16 or higher-order decode. |
| 6 (D2) | Data input | Second-highest data input; part of synchronous parallel load path independent of count-enable state. |
| 7 (Q2) | Output | Mid-range output; provides 2² timing reference; low skew ensures clean edges for downstream logic sampling. |
| 8 (D1) | Data input | Second LSB input; enables flexible initialization of counter state before run mode begins. |
| 9 (Q1) | Output | 2¹ output; used in BCD conversion, LED multiplexing, or interrupt timing windows. |
| 10 (D0) | Data input LSB | Loads LSB on rising CP when PE = LOW; completes full 4-bit parallel load capability. |
| 11 (Q0) | Output LSB | 2⁰ output; defines TC pulse width ≈ its HIGH duration; critical for synchronizing cascaded stages. |
| 12 (CP) | Clock input | Positive-edge-triggered; Schmitt-triggered for noise immunity; accepts slow edges (≤10 ns/V rise/fall rate). |
| 13 (TC) | Terminal count | Open-drain compatible output pulses HIGH only at count = 15; directly enables next counter's CEP/CET. |
| 14 (GND) | Ground | Secondary ground terminal; improves power integrity and reduces ground bounce in high-speed switching. |
| 15 (PE) | Parallel enable | Active-LOW load control; overrides counting action unconditionally - enables immediate state injection. |
| 16 (VCC) | Supply voltage | Single 1.2–3.6 V rail powers entire logic core; low ICC (≤40 μA) supports always-on monitoring circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous parallel load | Loads D0–D3 on rising CP regardless of CEP/CET state - enables instant counter reinitialization without cycle loss. |
| Asynchronous master reset | MR = LOW forces Q0–Q3 = LOW immediately, bypassing clock edge dependency - critical for fail-safe system recovery. |
| Look-ahead carry architecture | Eliminates ripple delay in cascaded counters; TC asserts within 7.8 ns (VCC = 3.3 V), enabling >100 MHz multi-stage operation. |
| Overvoltage-tolerant I/O | Accepts 0–5.5 V inputs while powered from 1.2–3.6 V - removes need for discrete level translators in mixed-voltage designs. |
| Schmitt-trigger inputs | Input hysteresis ≥0.3 V at VCC = 3.3 V - suppresses noise-induced false triggering on slow or noisy control lines. |
| JEDEC-compliant operation | Meets JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V) - ensures interoperability across voltage-scaled SoCs. |
Applications
| Industrial PLC Timing Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Generating precise 1–16 step timing sequences for solenoid actuation and relay sequencing in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronous 4-bit counter with parallel load and asynchronous reset provides deterministic, jitter-free interval generation synchronized to system clock. Use Value: Enables repeatable 16-state machine execution with <1.5 ns inter-output skew, eliminating timing-related race conditions in safety-critical control paths. |
Use Scenario: Implementing odometer roll-over detection and door-lock timeout counters in vehicle body electronics modules. IC Role / Device Role / Timing Role: Presettable binary counter with TC output drives interrupt requests upon reaching terminal count (15), triggering firmware actions. Use Value: Asynchronous MR allows immediate reset on ignition cycle start; overvoltage-tolerant inputs interface directly with 5 V sensor buses without added components. |
| Medical Infusion Pump Controllers | IoT Edge Node Event Counters |
|
Use Scenario: Tracking motor step counts and dose delivery intervals in battery-powered infusion pumps requiring long-term accuracy and low power. IC Role / Device Role / Timing Role: Low-voltage (1.2 V) operation and <40 μA ICC support extended runtime; TC output triggers ADC sampling at fixed intervals. Use Value: 1.2 V minimum supply enables direct use with buck-converted Li-ion rails; –40 °C to +125 °C rating covers sterilization and ambient storage conditions. |
Use Scenario: Counting GPIO interrupts from environmental sensors (e.g., motion, button press) in constrained wireless sensor nodes. IC Role / Device Role / Timing Role: Parallel load and asynchronous reset allow firmware to capture and hold event counts between BLE transmission bursts. Use Value: DHVQFN16 footprint (2.5 × 3.5 mm) saves board area vs. SO16/TSSOP; Schmitt inputs eliminate external RC filters on noisy mechanical switch inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit synchronous counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC163BQ,115 | Includes synchronous reset (instead of asynchronous MR); identical pinout and voltage specs. | Requires clocked reset sequence - unsuitable for immediate fault recovery but preferred in fully synchronous designs. | Select when system-wide synchronous reset coordination is required; avoid where instantaneous clear is mandatory. |
| SN74LV161APWR | TSSOP16 package (SOT403-1); same logic function but higher max fmax (175 MHz at 3.3 V) and different thermal profile. | Better high-frequency margin but larger footprint (4.4 mm width) and lower thermal efficiency than DHVQFN. | Choose for legacy TSSOP-compatible boards or when >150 MHz operation is needed; prefer 74LVC161BQ for space/thermal optimization. |
Compared with 74LVC161BQ,115, the 74LVC163BQ,115 trades asynchronous reset for synchronous controllability, while SN74LV161APWR offers higher speed at the cost of board area and thermal resistance - making the BQ variant optimal for compact, thermally demanding, or fail-safe-critical deployments.
Availability
74LVC161BQ,115 is available at Aetrix Electronics and suitable for industrial PLC timing modules, automotive body control units, medical infusion pump controllers, and IoT edge node event counters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC161BQ,115 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on reliability, efficiency, and miniaturization for automotive, industrial, and consumer markets.
The 74LVC161BQ belongs to Nexperia's LVC logic family - engineered for low-voltage, high-speed, mixed-signal interfacing in space-constrained and thermally demanding applications where precision timing and robust I/O are essential.
FAQ
Does the 74LVC161BQ,115 support 1.2 V operation with full functionality?
Yes. The device is fully specified from 1.2 V to 3.6 V per JEDEC standards, with guaranteed timing (e.g., tpd ≤17 ns at VCC = 1.2 V), VIH/VIL thresholds, and output drive strength across the entire range - enabling direct use with ultra-low-power microcontrollers and energy-harvesting systems.
Can TC output drive another 74LVC161BQ,115's CEP/CET inputs directly?
Yes. TC is a standard CMOS output with VOH ≥ VCC − 0.2 V and VOL ≤ 0.55 V at 24 mA sink, matching the VIH (≥0.65×VCC) and VIL (≤0.35×VCC) requirements of cascaded devices - enabling direct fan-out of up to 10 units without buffers.
What is the role of the exposed thermal pad on the DHVQFN16 package?
The exposed pad (terminal 1) is not electrically connected; it serves solely as a thermal conduction path. It may remain floating or be soldered to a GND plane for improved heat dissipation - critical for maintaining <125 °C junction temperature under continuous 500 mW power dissipation.
How does the look-ahead carry improve cascaded counter performance?
Unlike ripple-carry counters, look-ahead carry generates TC based on internal carry logic rather than Q3 propagation - reducing worst-case delay from ~4×tpd to ~1×tpd. This cuts total 16-bit cascade delay by >60%, enabling reliable operation above 100 MHz in multi-stage configurations.
74LVC161BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Binary Counter
- Direction:
- Up
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- Synchronous
- Count Rate:
- 150 MHz
- Trigger Type:
- Positive Edge
- Voltage - Supply:
- 1.2 V ~ 3.6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74LVC161BQ,115 FAQ
1.How can I place an order for 74LVC161BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC161BQ,115 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 74LVC161BQ,115 reliable?
The price and inventory of 74LVC161BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC161BQ,115 is usually 5 days.
3.What payment methods are accepted for 74LVC161BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC161BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC161BQ,115?
74LVC161BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC161BQ,115 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 74LVC161BQ,115?
For technical support, including 74LVC161BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC161BQ,115 requirements.
6.How does Aetrix verify that 74LVC161BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74LVC161BQ,115 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 74LVC161BQ,115 meets industry standards.
7.What is the process for return or replacement of 74LVC161BQ,115?
All 74LVC161BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC161BQ,115, 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 74LVC161BQ,115 part is unused and in its original packaging.
Return procedure for 74LVC161BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC161BQ,115 Tags
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74HC393BQ,115
Nexperia USA Inc.
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SN74LV8154PWR
Texas Instruments
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MC14516BDR2G
onsemi
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MC14020BDR2G
onsemi
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MC100EP32DTR2G
onsemi
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MC100EP016AMNG
onsemi
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MC100EP016AFAG
onsemi
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SN74LV163ADR
Texas Instruments
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SN74LV163APWR
Texas Instruments
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SN74HC393DR
Texas Instruments
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SN74HC161DR
Texas Instruments
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SN74HC163DR
Texas Instruments
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