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Nexperia USA Inc. 74HC390DB,118
- Part No.:
- 74HC390DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HC390DB,118.pdf
- Description:
- IC DECADE COUNTR DL 4BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,258
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Product details
Overview
74HC390DB,118 from Nexperia is a dual 4-bit decade ripple counter IC with two independent divide-by-2 and two divide-by-5 sections, asynchronous master reset inputs (1MR, 2MR), HIGH-to-LOW edge-triggered clocks (1CP0/1CP1/2CP0/2CP1), BCD or bi-quinary configuration capability, and operates from 2.0 V to 6.0 V supply. It enables frequency division by 2, 4, 5, 10, 20, 25, 50, or 100 in digital timing, clock distribution, and decade counting circuits.
For engineers reviewing the 74HC390DB,118 datasheet, 74HC390DB,118 pinout, 74HC390DB,118 application, or 74HC390DB,118 equivalent, this page delivers verified functional architecture, SO16 package pin mapping, BCD/bi-quinary configuration logic, propagation delay specs at 4.5 V (e.g., 17 ns CP0→Q0), and real-world selection guidance against 74HC393 and 74HC4017 alternatives.
Technical Context
This device implements two physically separate 4-bit ripple counters per package, each structured as cascaded divide-by-2 and divide-by-5 stages. Clock inputs (1CP0/1CP1/2CP0/2CP1) are edge-triggered on HIGH-to-LOW transitions, and asynchronous master resets (1MR/2MR) override all clock activity to force Q outputs LOW.
BCD operation requires external connection of 1Q0 to 1CP1; bi-quinary mode uses 1Q3→1CP0 with 1Q0 as decade output. The IC supports TTL-level interfacing via 74HCT390 variant, while 74HC390DB,118 uses CMOS input thresholds and includes clamp diodes for overvoltage-tolerant input driving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual decade ripple counter with independent divide-by-2 and divide-by-5 sections per counter |
| Supply Voltage Range | 2.0 V to 6.0 V - supports legacy 5 V systems and low-voltage mixed-signal designs |
| Propagation Delay (1CP0 → 1Q0) | 17 ns max at VCC = 4.5 V, CL = 50 pF - defines maximum operating frequency of 24 MHz in single-stage use |
| Input Thresholds | CMOS-compatible: VIH = 3.15 V, VIL = 1.35 V at VCC = 4.5 V - ensures noise margin >1.3 V in 5 V systems |
| Operating Temperature | -40 °C to +125 °C - qualified for industrial and extended-temperature embedded control applications |
| Output Drive | ±4.0 mA at VCC = 4.5 V - sufficient to drive 10 LS-TTL loads or directly interface with microcontroller GPIO |
| Power Dissipation | 500 mW max (SO16); derates linearly above 110 °C - enables stable operation in thermally constrained PCB layouts |
Pinout & Package
74HC390DB,118 is packaged in SO16 (SOT109-1): plastic small outline, 16-pin, 3.9 mm body width, surface-mountable with standard reflow profile.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1CP0, 2CP0 | Divide-by-2 section clock inputs - HIGH-to-LOW edge-triggered; used as primary counter input in BCD mode |
| 2, 14 | 1MR, 2MR | Asynchronous master reset - active HIGH; overrides clocks and forces all Q outputs LOW immediately |
| 3, 5, 6, 7 | 1Q0–1Q3 | First decade counter outputs - Q0 (LSB), Q1, Q2, Q3 (MSB); form BCD code (0–9) when configured |
| 4, 12 | 1CP1, 2CP1 | Divide-by-5 section clock inputs - triggered by Q0 (BCD) or Q3 (bi-quinary) from same counter |
| 8 | GND | Ground reference - must be low-impedance return path for all internal switching currents |
| 9–13 | 2Q0–2Q3 | Second decade counter outputs - electrically isolated from first counter; enables dual independent decade counts |
| 16 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm of pin for stable ripple counting |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decade counters | Enables simultaneous BCD counting of two separate signals (e.g., seconds + minutes) without external gating logic |
| Configurable BCD or bi-quinary output | Supports legacy metering displays (bi-quinary) and modern microcontroller interfaces (BCD) via simple external wiring |
| Asynchronous master reset per counter | Allows precise zero-reset of individual decades during runtime - critical for synchronous multi-digit display updates |
| Clamp diode-equipped inputs | Permits safe interfacing to 12 V control signals using series current-limiting resistors, eliminating level-shifter ICs |
| High noise immunity & latch-up robustness | Exceeds JESD78 Class II Level B (100 mA), enabling reliable operation in electrically noisy industrial PLC I/O modules |
Applications
| Industrial Counter Modules | Digital Clock Dividers |
|---|---|
Use Scenario: High-reliability production line part counters tracking units per shift using optical encoder pulses. IC Role / Device Role / Timing Role: Primary decade counter converting encoder edges into BCD digits for 7-segment LED driver interface. Use Value: Asynchronous reset allows immediate zeroing after batch completion; dual counters support concurrent count-and-total functions. |
Use Scenario: Deriving 1 Hz, 10 Hz, and 100 Hz timing references from a 1 MHz crystal oscillator in test equipment. IC Role / Device Role / Timing Role: Cascaded ripple divider providing precise integer division ratios (÷10, ÷100, ÷1000) with minimal component count. Use Value: Eliminates need for programmable logic or microcontroller-based division; deterministic propagation delays ensure jitter-free sub-harmonics. |
| Legacy Display Interfaces | Bi-Quinary Metering Systems |
Use Scenario: Driving vintage Nixie tube or incandescent digit displays requiring direct BCD input in retro instrumentation. IC Role / Device Role / Timing Role: BCD decade counter generating native 4-bit digit codes synchronized to mechanical switch bounce filtering. Use Value: Direct compatibility with discrete transistor digit drivers; no firmware or glue logic needed for display update timing. |
Use Scenario: Utility electricity meters using bi-quinary encoding for tamper-resistant pulse accumulation and readout. IC Role / Device Role / Timing Role: Bi-quinary counter where Q3 drives next stage clock and Q0 serves as decade carry output. Use Value: Inherent error detection via dual-bit encoding; reduces miscount risk in high-pulse-rate energy measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar decade counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC393 | Dual 4-bit binary counter (÷2, ÷4, ÷8…÷16); no built-in divide-by-5 logic or BCD output | Requires external NAND feedback for decade wraparound; adds propagation delay and component count | Select when binary counting suffices and board space permits extra logic; avoid for strict BCD display needs. |
| 74HC4017 | Decade Johnson counter with decoded decimal outputs (1-of-10); no ripple-carry or cascading flexibility | Provides active-HIGH decoded outputs per digit; unsuitable for BCD bus driving or frequency division | Choose for sequential LED activation or stepper motor indexing; not a functional substitute for ripple-based division. |
Compared with 74HC393 and 74HC4017, the 74HC390DB,118 uniquely integrates dual BCD/bi-quinary decade functionality with independent reset and clock domains - enabling compact, deterministic, and display-ready counting without external decode or feedback logic.
Availability
74HC390DB,118 is available at Aetrix Electronics and suitable for industrial counter modules, digital clock dividers, legacy display interfaces, and bi-quinary metering systems requiring stable component supply across extended temperature ranges.
Supply support for 74HC390DB,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HC390DB,118 belongs to Nexperia's HC logic family, designed specifically for robust, low-power, pin-compatible replacements of legacy TTL and CMOS counters in timing-critical industrial control and instrumentation applications.
FAQ
What is the difference between 74HC390DB,118 and 74HCT390DB,118?
The 74HC390DB,118 uses CMOS input thresholds (VIH ≈ 3.15 V at 4.5 V), while the 74HCT390DB,118 features TTL-compatible inputs (VIH = 2.0 V min). Both share identical pinout, function, and output drive. Choose HC for pure CMOS systems; select HCT when interfacing directly with legacy 5 V TTL outputs without level shifters.
Can 74HC390DB,118 operate at 3.3 V supply?
No - the 74HC390DB,118 is specified for 2.0 V to 6.0 V, but its recommended operating range starts at 4.5 V for full 5 V TTL compatibility. At 3.3 V, VIH exceeds 2.3 V (70% of VCC), risking unreliable HIGH recognition; use 74LVC390 or similar 3.3 V-optimized logic instead.
How do I configure 74HC390DB,118 for BCD counting?
Connect 1Q0 output to 1CP1 input and apply clock signal to 1CP0. Similarly, connect 2Q0 to 2CP1 and clock 2CP0. This creates two independent BCD decade counters. Ensure 1MR and 2MR are held LOW during normal operation; assert HIGH only to reset.
Is 74HC390DB,118 suitable for automotive applications?
No - the 74HC390DB,118 is not AEC-Q100 qualified and lacks automotive-grade screening, temperature validation beyond -40 °C to +125 °C, or enhanced ESD robustness required for vehicle ECUs. Use Nexperia's automotive-qualified 74AHC390 variants for such applications.
74HC390DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Counter, Decade
- Direction:
- Up
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- -
- Count Rate:
- 71 MHz
- Trigger Type:
- Negative Edge
- Voltage - Supply:
- 2 V ~ 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HC390DB,118 FAQ
1.How can I place an order for 74HC390DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC390DB,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 74HC390DB,118 reliable?
The price and inventory of 74HC390DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC390DB,118 is usually 5 days.
3.What payment methods are accepted for 74HC390DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC390DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC390DB,118?
74HC390DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC390DB,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 74HC390DB,118?
For technical support, including 74HC390DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC390DB,118 requirements.
6.How does Aetrix verify that 74HC390DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HC390DB,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 74HC390DB,118 meets industry standards.
7.What is the process for return or replacement of 74HC390DB,118?
All 74HC390DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC390DB,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 74HC390DB,118 part is unused and in its original packaging.
Return procedure for 74HC390DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC390DB,118 Tags
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74HC393BQ,115
Nexperia USA Inc.
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