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Nexperia USA Inc. 74LVC161D,118
- Part No.:
- 74LVC161D,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVC161D,118.pdf
- Description:
- IC BINARY COUNTER 4-BIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:402
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Product details
Overview
74LVC161D,118 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 timing in industrial control logic.
For engineers reviewing the 74LVC161D,118 datasheet, 74LVC161D,118 pinout, 74LVC161D,118 application, or 74LVC161D,118 equivalent, this device serves as a drop-in replacement for legacy 74LS161/74HC161 in clock-synchronized counting, address generation, and state-machine sequencing where low-power CMOS operation, Schmitt-trigger noise immunity, and -40 °C to +125 °C temperature range are required.
Technical Context
The 74LVC161D implements four edge-triggered D-type flip-flops with synchronous parallel load and asynchronous clear. Its look-ahead carry architecture enables deterministic propagation delay (CP to TC ≤ 9.5 ns at VCC = 3.6 V) and eliminates ripple-carry latency when cascading multiple counters.
Counting is enabled only when both CEP and CET are HIGH; CET directly gates the TC output, ensuring TC asserts only at terminal count (Q3Q2Q1Q0 = 1111) and remains HIGH for one CP cycle. The MR input forces all outputs LOW independently of clock or enable states, providing fail-safe reset behavior in safety-critical sequencers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | LVC (Low-Voltage CMOS) - ensures compatibility with 1.2 V–3.6 V supply rails and TTL-level interfacing. |
| Counter Width | 4-bit binary - provides 0–15 count range with direct Q0–Q3 outputs for address or state encoding. |
| Max Clock Frequency | 150 MHz at VCC = 3.6 V - supports high-speed timing in digital controllers and data-path sequencers. |
| Supply Voltage Range | 1.2 V to 3.6 V - enables ultra-low-power operation in battery-backed systems and wide-rail flexibility. |
| Input Overvoltage Tolerance | Up to 5.5 V - allows safe interfacing with 5 V logic without level shifters in mixed-voltage designs. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and harsh-environment embedded use. |
| Propagation Delay (CP→Qn) | ≤ 7.3 ns at VCC = 3.6 V - guarantees tight timing margins in synchronous state machines and pipeline counters. |
Pinout & Package
74LVC161D,118 is supplied in SO16 (SOT109-1) package: plastic small outline, 16-pin, 3.9 mm body width, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Asynchronous master reset | Active-LOW signal forcing Q0–Q3 = 0000 regardless of clock or enable state - critical for system initialization and fault recovery. |
| 2 (CP) | Positive-edge clock input | Triggers synchronous count, load, or hold on rising edge - defines timing reference for all state transitions. |
| 3–6 (D0–D3) | Parallel data inputs | Load preset value into counter on next CP edge when PE = LOW - enables programmable start points in sequence generators. |
| 7 (CEP) | Count enable (parallel) | Enables counting only when HIGH; used with CET to gate count action - supports hierarchical enable trees in multi-counter systems. |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and I/O - must be low-impedance to maintain noise margin and timing integrity. |
| 9 (PE) | Parallel enable | Active-LOW control for synchronous parallel load - decouples data loading from count enable logic for flexible control flow. |
| 10 (CET) | Count enable (terminal) | Enables TC output when HIGH and counter reaches 15 - feeds carry chain to next stage in cascaded counters. |
| 11–14 (Q0–Q3) | Flip-flop outputs | Binary-weighted outputs (Q0 = LSB) - drive downstream logic, LEDs, or bus lines with 24 mA sink/source capability. |
| 15 (TC) | Terminal count output | HIGH for one CP cycle when Q3Q2Q1Q0 = 1111 - provides precise carry pulse for ripple-free multi-bit counting. |
| 16 (VCC) | Supply voltage | 1.2 V–3.6 V power rail - powers all internal logic; bypass capacitor required near pin for stable high-frequency operation. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Immunity to slow-rising/falling signals (Δt/ΔV ≤ 20 ns/V at 1.65 V) - eliminates external hysteresis components in noisy industrial environments. |
| Look-ahead carry | Eliminates cumulative propagation delay in cascaded counters - enables predictable timing across n-bit chains without ripple delay penalty. |
| Two independent count enables | CEP and CET allow separate gating of count action and carry generation - supports complex enable hierarchies in multi-function sequencers. |
| Overvoltage-tolerant I/O | Inputs withstand 5.5 V while powered from 1.2 V–3.6 V - removes need for external level translators in mixed-supply systems. |
| Wide temperature range | Specified from -40 °C to +125 °C - validated for automotive engine control units and industrial motor drives without derating. |
Applications
| Industrial PLC Timer Modules | Automotive Engine Control Sequencing |
|---|---|
|
Use Scenario: Generating precise time delays and event intervals in programmable logic controller scan cycles. IC Role / Device Role / Timing Role: Synchronous 4-bit counter driving interrupt timers and watchdog timeout circuits with deterministic TC pulse. Use Value: Enables sub-millisecond resolution timing using internal clock and cascaded stages, reducing FPGA or microcontroller resource usage. |
Use Scenario: Managing ignition coil firing order and fuel injector sequencing in 4-cylinder engine ECU. IC Role / Device Role / Timing Role: Presettable binary counter generating cylinder-phase addresses synchronized to crankshaft position sensor edges. Use Value: Provides glitch-free, jitter-immune phase indexing with Schmitt-trigger inputs tolerating noisy cam/crank signals. |
| LED Display Multiplexing Drivers | Test Equipment Pattern Generators |
|
Use Scenario: Scanning 16-segment LED displays by cycling through digit select lines in 4-bit sequence. IC Role / Device Role / Timing Role: Binary counter supplying row/column address bits to display driver ICs with parallel load for display reset. Use Value: Reduces MCU GPIO overhead by offloading address generation; asynchronous MR ensures clean display blanking during power-up. |
Use Scenario: Producing repeatable stimulus patterns for digital circuit validation in benchtop ATE systems. IC Role / Device Role / Timing Role: Cascaded counter generating multi-bit test vectors synchronized to system clock with programmable start point. Use Value: Supports arbitrary pattern length via preset and terminal count feedback, enabling flexible test coverage without firmware changes. |
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 |
|---|---|---|---|
| 74HC161PW,118 | Higher VCC range (2 V–6 V); slower max fmax (36 MHz at 6 V); no 1.2 V operation; higher ICC (80 μA typical). | Preferred in legacy 5 V systems; unsuitable for sub-2 V battery-powered designs. | Select when interfacing exclusively with 5 V logic and lower speed suffices; avoid for low-voltage or high-speed requirements. |
| SN74LV161APW | Texas Instruments part; identical function but different AC specs: tpd = 11 ns (vs. 7.3 ns); wider VCC (2 V–5.5 V); no 1.2 V support. | Used in TI-based reference designs; requires revalidation of timing margins in high-frequency cascades. | Choose only if TI ecosystem alignment is mandatory; verify TC pulse width and setup/hold times against original design. |
Compared with 74HC161PW,118 and SN74LV161APW, the 74LVC161D,118 uniquely supports 1.2 V operation, achieves 150 MHz maximum frequency, and offers tighter propagation delay - making it optimal for modern low-voltage, high-speed embedded sequencers where power and timing co-design are critical.
Availability
74LVC161D,118 is available at Aetrix Electronics and suitable for industrial PLC timer modules, automotive engine control units, LED display multiplexers, and test equipment pattern generators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC161D,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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in automotive, industrial, and consumer applications.
The 74LVC161D belongs to Nexperia's LVC logic family - engineered for low-voltage operation (1.2 V–3.6 V), high noise immunity, and seamless integration into mixed-signal systems requiring robust, pin-compatible replacements for legacy TTL and HC logic.
FAQ
What is the minimum supply voltage for reliable operation of the 74LVC161D,118?
The 74LVC161D,118 is fully specified down to 1.2 V supply voltage, with guaranteed functionality including VIH/VIL thresholds, propagation delay, and output drive strength across the full -40 °C to +125 °C temperature range. Below 1.2 V, timing and logic levels are not characterized.
Can the 74LVC161D,118 interface directly with 5 V microcontrollers?
Yes - its inputs tolerate up to 5.5 V regardless of VCC level (1.2 V–3.6 V), allowing direct connection to 5 V GPIO without level shifters. Outputs swing rail-to-rail (0 V to VCC), so external pull-ups or translators are needed if driving 5 V inputs requiring >3.5 V HIGH threshold.
How does the look-ahead carry improve cascading performance versus ripple-carry counters?
Look-ahead carry generates the TC output combinatorially from internal carry signals, eliminating cumulative propagation delay across stages. In contrast, ripple-carry counters require Q3 to settle before enabling the next stage, adding up to 4×tpd latency per additional 4-bit stage - a critical limitation in high-speed timing chains.
Is the MR (master reset) pin truly asynchronous, and what happens during simultaneous MR assertion and CP edge?
Yes - MR is fully asynchronous: asserting MR LOW forces Q0–Q3 = 0000 within tPHL(MR→Qn) ≤ 8.0 ns (VCC = 3.6 V), irrespective of CP, PE, CEP, or CET states. If MR and CP rise simultaneously, MR takes precedence and overrides the clock-triggered action, ensuring deterministic reset behavior.
74LVC161D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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-SO
74LVC161D,118 FAQ
1.How can I place an order for 74LVC161D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC161D,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 74LVC161D,118 reliable?
The price and inventory of 74LVC161D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC161D,118 is usually 5 days.
3.What payment methods are accepted for 74LVC161D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC161D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC161D,118?
74LVC161D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC161D,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 74LVC161D,118?
For technical support, including 74LVC161D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC161D,118 requirements.
6.How does Aetrix verify that 74LVC161D,118 is sourced from the original manufacturer or authorized distributors?
All 74LVC161D,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 74LVC161D,118 meets industry standards.
7.What is the process for return or replacement of 74LVC161D,118?
All 74LVC161D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC161D,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 74LVC161D,118 part is unused and in its original packaging.
Return procedure for 74LVC161D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC161D,118 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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onsemi
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MC100EP016AMNG
onsemi
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MC100EP016AFAG
onsemi
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SN74LV163ADR
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Texas Instruments
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SN74HC393DR
Texas Instruments
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SN74HC161DR
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SN74HC163DR
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