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Nexperia USA Inc. 74HCT390D,653
- Part No.:
- 74HCT390D,653
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT390D,653.pdf
- Description:
- IC DECADE COUNTER DL 4BIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
74HCT390D,653 from Nexperia is a dual 4-bit decade ripple counter IC with two independent divide-by-2 and two divide-by-5 sections, operating at 4.5 V to 5.5 V supply, supporting BCD or bi-quinary counting modes, and used in frequency division and timing control circuits for industrial instrumentation and digital logic systems.
For engineers reviewing the 74HCT390D,653 datasheet, 74HCT390D,653 pinout, 74HCT390D,653 application, or 74HCT390D,653 equivalent, this device delivers TTL-compatible input thresholds, asynchronous master reset per counter section, HIGH-to-LOW edge-triggered clocks, and configurable divide-by-2/4/5/10/20/25/50/100 ratios in a single SO16 package.
Technical Context
The 74HCT390D,653 implements two independent ripple counter blocks, each composed of cascaded flip-flops: one divide-by-2 stage (Q0) feeding a four-stage divide-by-5 chain (Q0–Q3), enabling BCD decade counting when Q0 drives CP1, or bi-quinary operation when Q3 feeds CP0. Each block has dedicated clock inputs (1CP0/1CP1, 2CP0/2CP1) and individual master reset (1MR/2MR).
All eight flip-flops are asynchronously cleared by HIGH on their respective MR inputs, overriding clock activity. The device uses standard CMOS silicon with TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct interfacing with legacy TTL logic without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - Ensures compatibility with 5 V TTL and mixed-signal systems without regulation overhead. |
| Input threshold (VIH/VIL) | 2.0 V / 0.8 V - Matches standard TTL logic levels, eliminating need for external level translation. |
| Max clock frequency | 55 MHz at VCC = 4.5 V - Supports high-speed frequency division up to divide-by-2 in critical timing paths. |
| Propagation delay (nCP0→nQ0) | 34 ns max at VCC = 4.5 V - Enables precise timing budgeting in synchronous ripple counter chains. |
| Operating temperature | -40 °C to +125 °C - Qualified for extended industrial and under-hood embedded applications. |
| Output drive (VOH/VOL) | 3.98 V / 0.26 V at IO = ±4 mA - Delivers robust noise margin and fan-out capability into 5 V CMOS/TTL loads. |
| Power dissipation capacitance | 21 pF - Allows accurate dynamic power estimation (PD = CPD × VCC² × fi × N) for thermal design. |
Pinout & Package
74HCT390D,653 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads and 3.9 mm body width, optimized for surface-mount assembly and thermal performance up to 125 °C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CP0, 2CP0 | Divide-by-2 clock input | HIGH-to-LOW edge-triggered; initiates toggle of Q0 output in each counter section. |
| 1CP1, 2CP1 | Divide-by-5 clock input | HIGH-to-LOW edge-triggered; advances Q1–Q3 outputs after Q0 toggles in cascade mode. |
| 1MR, 2MR | Asynchronous master reset | Active-HIGH signal forcing all four outputs (Q0–Q3) LOW regardless of clock state. |
| 1Q0–1Q3, 2Q0–2Q3 | Counter outputs | CMOS-compatible buffered outputs representing binary-coded decade states (0–9). |
| VCC (Pin 16) | Positive supply | 4.5–5.5 V rail; decoupling capacitor placement near this pin minimizes switching noise coupling. |
| GND (Pin 8) | Ground reference | 0 V return path; must be low-impedance to maintain output integrity and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decade counters | Two fully separate 4-bit ripple counters enable simultaneous BCD timing and frequency division tasks on one die. |
| Configurable division ratios | Supports divide-by-2, 4, 5, 10, 20, 25, 50, and 100 via internal cascade wiring - no external logic required. |
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V supply allow direct connection to 74LS/74F families without interface circuitry. |
| Asynchronous reset per section | Independent 1MR and 2MR pins permit selective clearing of either decade counter without affecting the other. |
| High noise immunity | Guaranteed 400 mV noise margin at VCC = 5 V ensures reliable operation in electrically noisy industrial environments. |
Applications
| Industrial Timer Modules | Digital Panel Meters |
|---|---|
|
Use Scenario: Generating precise 0.1 s, 1 s, and 10 s timebases from a 100 Hz crystal oscillator in programmable logic controllers. IC Role / Device Role / Timing Role: Primary decade divider implementing cascaded BCD counting stages to produce decade-aligned timing pulses. Use Value: Eliminates need for multiple discrete counters or microcontroller-based timing, reducing BOM count and firmware complexity. |
Use Scenario: Converting analog-to-digital converter (ADC) output codes into decimal digits for 3½-digit LED display drivers. IC Role / Device Role / Timing Role: Bi-quinary decade counter synchronizing digit updates with ADC conversion completion signals. Use Value: Provides deterministic, glitch-free digit sequencing without software intervention or additional decode logic. |
| Frequency Synthesis Front-Ends | Legacy Bus Timing Generators |
|
Use Scenario: Deriving sub-multiple clock frequencies (e.g., 1 MHz → 100 kHz, 20 kHz) for sensor interface ASICs in test equipment. IC Role / Device Role / Timing Role: Programmable frequency divider using external jumpers to select CP0/CP1 routing for ratio selection. Use Value: Enables field-configurable clock trees without redesigning PCB layout or replacing components. |
Use Scenario: Generating strobe, address latch enable (ALE), and memory read/write timing signals for 8085/8080-based embedded controllers. IC Role / Device Role / Timing Role: Ripple counter generating multi-phase non-overlapping control waveforms synchronized to system clock. Use Value: Replaces custom PAL/GAL logic with a single, pin-compatible, low-power solution meeting vintage bus timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar decade counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC390D,653 | CMOS input thresholds (VIH = 3.15 V min); wider 2–6 V supply range | Better suited for mixed-voltage systems where 3.3 V logic coexists with 5 V peripherals | Select when interfacing with HC-series or mixed-supply designs requiring lower static current. |
| SN74LS390N | TTL input/output; 4.75–5.25 V only; higher ICC (40 mA typical); slower (30 ns max fmax) | Compatible with legacy LS-TTL boards but consumes more power and generates more heat | Choose only for drop-in replacement on existing LS-based PCBs with no layout changes possible. |
Compared with 74HC390D,653 and SN74LS390N, the 74HCT390D,653 uniquely balances TTL input compatibility, 5 V system integration, and low dynamic power - making it optimal for new industrial designs migrating from LS logic without redesigning power or signal integrity.
Availability
74HCT390D,653 is available at Aetrix Electronics and suitable for industrial timer modules, digital panel meters, frequency synthesis front-ends, and legacy bus timing generators requiring stable component supply across extended temperature ranges.
Supply support for 74HCT390D,653 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, reliable logic, analog, and discrete components for automotive, industrial, and consumer applications.
The 74HCT390D,653 belongs to Nexperia's 74HCT logic family, engineered specifically to bridge TTL and CMOS domains while maintaining industrial-grade reliability and thermal robustness.
FAQ
What is the maximum clock frequency supported by the 74HCT390D,653?
The 74HCT390D,653 supports a maximum clock frequency of 55 MHz at VCC = 4.5 V and CL = 15 pF, as specified in Table 8 of the datasheet. This applies to the nCP0 input driving the first divide-by-2 stage; propagation delays increase for downstream outputs (e.g., nCP1→nQ3 is 77 ns max), limiting overall cascade speed.
Can the 74HCT390D,653 operate with a 3.3 V supply?
No - the 74HCT390D,653 is specified only for 4.5 V to 5.5 V operation per Table 6. Its TTL-compatible input thresholds require ≥4.5 V to guarantee VIH ≥2.0 V and VIL ≤0.8 V. For 3.3 V systems, use the 74LVC390 or similar LVCMOS-compatible part.
How do I configure the device for BCD versus bi-quinary counting?
For BCD: connect 1Q0 to 1CP1 and apply input clock to 1CP0. For bi-quinary: connect 1Q3 to 1CP0 and apply input clock to 1CP1. The same routing applies to the second counter (2Q0→2CP1 or 2Q3→2CP0). Pin 1 (1CP0) and Pin 4 (1CP1) are physically separated to simplify external jumpering.
Does the 74HCT390D,653 have ESD protection, and what level is certified?
Yes - the 74HCT390D,653 features HBM ESD protection exceeding 2000 V and CDM protection exceeding 1000 V, per ANSI/ESDA/JEDEC JS-001 Class 2 and JS-002 Class C3 standards. This enables safe handling during manual assembly and resilience against board-level electrostatic events in industrial enclosures.
74HCT390D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Counter, Decade
- Direction:
- Up
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- -
- Count Rate:
- 55 MHz
- Trigger Type:
- Negative Edge
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HCT390D,653 FAQ
1.How can I place an order for 74HCT390D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT390D,653 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 74HCT390D,653 reliable?
The price and inventory of 74HCT390D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT390D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT390D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT390D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT390D,653?
74HCT390D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT390D,653 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 74HCT390D,653?
For technical support, including 74HCT390D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT390D,653 requirements.
6.How does Aetrix verify that 74HCT390D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT390D,653 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 74HCT390D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT390D,653?
All 74HCT390D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT390D,653, 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 74HCT390D,653 part is unused and in its original packaging.
Return procedure for 74HCT390D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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