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NXP Semiconductors 74HCT390D,652
- Part No.:
- 74HCT390D,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Counters, Dividers
- Package:
- -
- Datasheet:
-
74HCT390D,652.pdf
- Description:
- NEXPERIA 74HCT390D - DECADE COUN
- Quantity:
- Payment:
- Shipping:
Inventory:9,554
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Product details
Overview
74HCT390D,652 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), TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), and SO16 package. It supports BCD or bi-quinary decade counting, enabling frequency division by 2, 4, 5, 10, 20, 25, 50, or 100 in industrial timing and digital logic control systems.
For engineers reviewing the 74HCT390D,652 datasheet, 74HCT390D,652 pinout, 74HCT390D,652 application, or 74HCT390D,652 equivalent, this page delivers verified functional architecture, exact SO16 pin mapping, real-world BCD/bi-quinary configuration guidance, propagation delay specs (tpd = 21–51 ns at VCC = 4.5 V), and validated alternatives for legacy TTL-level counter replacement.
Technical Context
The 74HCT390D,652 implements two physically separate 4-bit ripple counters - each composed of cascaded flip-flops - with independent clock inputs (1CP0/1CP1 and 2CP0/2CP1) and shared asynchronous master reset (1MR/2MR). Each section operates as a synchronous divide-by-2 stage followed by an asynchronous divide-by-5 stage, triggered on HIGH-to-LOW clock edges.
BCD operation requires external connection of 1Q0 to 1CP1; bi-quinary mode uses 1Q3 feedback to 1CP0. Output drive capability is ±4.0 mA at VCC = 4.5 V, with guaranteed noise immunity and latch-up performance exceeding 100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) enable direct interfacing with legacy 5 V TTL systems without level shifters. |
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V rail tolerance; excludes 3.3 V operation, preventing misapplication in mixed-voltage designs. |
| Max Clock Frequency | 55 MHz at VCC = 4.5 V - enables reliable decade counting up to 55 MHz input, supporting high-speed timing in instrumentation and test equipment. |
| Propagation Delay | 21–51 ns (nCP0→nQ0 to nCP1→nQ3) - defines worst-case ripple-through latency across full 4-bit chain; critical for setup/hold timing in synchronous systems. |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial environments including motor drives, power supplies, and factory automation controllers. |
| Output Drive | ±4.0 mA at VCC = 4.5 V - sufficient to directly drive multiple 74-series inputs (fan-out ≥ 10) or small LEDs via current-limiting resistors. |
| Power Dissipation | 21 pF CPD - used to calculate dynamic power: PD = CPD × VCC² × fi × N; enables accurate thermal estimation in dense PCB layouts. |
Pinout & Package
74HCT390D,652 uses the SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm pitch, gull-wing leads. Pin 1 index marked by notch or bevel; moisture sensitivity level (MSL) not specified in source data.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CP0, 2CP0 | Divide-by-2 clock input | HIGH-to-LOW edge-triggered; resets associated Q0–Q3 outputs on active-HIGH 1MR/2MR regardless of clock state. |
| 1MR, 2MR | Asynchronous master reset | Active-HIGH override; forces all four outputs (Q0–Q3) LOW immediately, independent of clock timing or state. |
| 1CP1, 2CP1 | Divide-by-5 clock input | HIGH-to-LOW edge-triggered; accepts output from preceding divide-by-2 stage (e.g., 1Q0 → 1CP1 for BCD mode). |
| 1Q0–1Q3, 2Q0–2Q3 | Flip-flop outputs | Binary-coded outputs per decade section; Q0 = LSB, Q3 = MSB; open-drain behavior not supported - push-pull CMOS outputs. |
| VCC (Pin 16), GND (Pin 8) | Power supply terminals | Single 5 V supply only; no dual-rail or split-supply operation; decoupling capacitor (100 nF) required within 10 mm of VCC/GND pins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decade counters | Two fully isolated 4-bit ripple counters (Section 1 and Section 2) allow simultaneous BCD counting at different frequencies or asynchronous reset control. |
| Configurable division ratios | Supports divide-by-2, 4, 5, 10, 20, 25, 50, and 100 via internal cascade routing - eliminates need for external logic gates in frequency synthesis. |
| TTL-compatible input thresholds | VIH = 2.0 V min / VIL = 0.8 V max at VCC = 4.5–5.5 V ensures interoperability with legacy 74LS, 74F, and microcontroller GPIOs without interface circuitry. |
| High-noise immunity & latch-up robustness | Exceeds JESD78 Class II Level B (100 mA latch-up immunity); immune to typical industrial EMI transients without additional filtering. |
| Extended temperature range | Rated from -40 °C to +125 °C - validated for under-hood automotive auxiliary modules, industrial PLC I/O cards, and power converter control boards. |
Applications
| Industrial Timer Module | Digital Panel Meter |
|---|---|
Use Scenario: A programmable 100 ms–10 s interval timer in a factory HMI panel, using crystal oscillator input divided down to precise timebase. IC Role / Device Role / Timing Role: Primary frequency divider generating stable sub-Hz to kHz timing signals; configured in BCD mode with 1Q0→1CP1 feedback. Use Value: Eliminates microcontroller firmware timing loops; provides deterministic, jitter-free intervals unaffected by software interrupts or CPU load. |
Use Scenario: 4-digit LED display driver in a bench multimeter, converting ADC output pulses into decimal digit updates. IC Role / Device Role / Timing Role: Decade counter synchronizing digit multiplexing clock; bi-quinary mode used for tens/hundreds digit decoding. Use Value: Reduces BOM count by replacing discrete 74LS90 + glue logic; enables direct LED segment drive via parallel Q0–Q3 outputs. |
| Legacy System Upgrade | Test Equipment Clock Generator |
Use Scenario: Retrofitting obsolete 74LS390 in a 1980s oscilloscope timing board with pin-compatible modern replacement. IC Role / Device Role / Timing Role: Drop-in TTL-level counter maintaining identical pinout, timing, and fan-out; no PCB redesign required. Use Value: Restores long-term serviceability while improving reliability (lower ICC, higher noise margin) and eliminating end-of-life sourcing risk. |
Use Scenario: Programmable clock source in automated test equipment, generating precise 100 kHz, 1 MHz, and 10 MHz reference clocks from a 10 MHz OCXO. IC Role / Device Role / Timing Role: First-stage divider in multi-stage frequency synthesizer; cascaded sections yield exact integer divisions without PLL complexity. Use Value: Avoids phase noise degradation from analog PLLs; delivers low-jitter, deterministic clock edges essential for high-speed digital pattern generation. |
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 at VCC = 4.5 V); lower ICC (8 μA typ), wider VCC range (2.0–6.0 V). | Requires level-shifting when interfacing with 5 V TTL; unsuitable for direct LS/F-family replacement without pull-ups. | Select when system uses mixed 3.3 V/5 V logic and low static power is critical; avoid in pure TTL environments. |
| SN74LS390N | Bipolar TTL technology; VIH = 2.0 V min, but higher ICC (30 mA typ), limited temp range (-55 °C to +125 °C), no 125 °C guarantee. | Higher power dissipation and heat generation; obsolete packaging (PDIP); incompatible with modern reflow profiles. | Accept only for legacy repair; not recommended for new designs due to obsolescence, thermal, and RoHS compliance risks. |
Compared with 74HC390D,653, the 74HCT390D,652 ensures seamless TTL integration without external biasing; versus SN74LS390N, it delivers 95% lower quiescent current, guaranteed 125 °C operation, and lead-free SO16 packaging - making it the optimal choice for new industrial designs requiring reliability and regulatory compliance.
Availability
74HCT390D,652 is available at Aetrix Electronics and suitable for industrial timer modules, digital panel meters, legacy system upgrades, and test equipment clock generators requiring stable component supply, long-lifecycle support, and guaranteed SO16 packaging consistency.
Supply support for 74HCT390D,652 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 high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and computing markets.
The 74HCT390D,652 belongs to Nexperia's 74HCT logic family - engineered specifically for robust 5 V TTL interoperability in industrial control, instrumentation, and legacy system modernization applications.
FAQ
What is the maximum operating frequency of the 74HCT390D,652?
The 74HCT390D,652 achieves a maximum clock frequency of 55 MHz at VCC = 4.5 V and Tamb = 25 °C, with derating to 18 MHz at +125 °C ambient. This rating applies to the primary clock input (1CP0 or 2CP0); internal ripple delays limit effective throughput in cascaded configurations.
Can the 74HCT390D,652 operate at 3.3 V supply voltage?
No - the 74HCT390D,652 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds require minimum 4.5 V VCC to guarantee VIH ≥ 2.0 V and VIL ≤ 0.8 V; operation below 4.5 V violates recommended conditions and risks logic failure.
How do I configure the 74HCT390D,652 for BCD decade counting?
Connect output 1Q0 to input 1CP1 (and 2Q0 to 2CP1 for second section); apply clock signal to 1CP0. This creates a divide-by-2 stage feeding a divide-by-5 stage, yielding 10-state BCD output on Q0–Q3. The 74HCT390D,652 datasheet Figure 5 shows this wiring explicitly.
Is the 74HCT390D,652 pin-compatible with the obsolete 74LS390?
Yes - the 74HCT390D,652 shares identical SO16 pinout, electrical timing (tpd, tW), and TTL-level input compatibility with the 74LS390, enabling direct replacement in existing designs without layout changes or firmware modification.
74HCT390D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Direction:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Reset:
- -
- Timing:
- -
- Count Rate:
- -
- Trigger Type:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HCT390D,652 FAQ
1.How can I place an order for 74HCT390D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT390D,652 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,652 reliable?
The price and inventory of 74HCT390D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT390D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT390D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT390D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT390D,652?
74HCT390D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT390D,652 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,652?
For technical support, including 74HCT390D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT390D,652 requirements.
6.How does Aetrix verify that 74HCT390D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT390D,652 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,652 meets industry standards.
7.What is the process for return or replacement of 74HCT390D,652?
All 74HCT390D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT390D,652, 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,652 part is unused and in its original packaging.
Return procedure for 74HCT390D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT390D,652 Tags
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Nexperia USA Inc.
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