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NXP Semiconductors HEF4585BP,652
- Part No.:
- HEF4585BP,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HEF4585BP,652.pdf
- Description:
- IC COMPARATOR MAG 4BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
HEF4585BP,652 from NXP Semiconductors is a 4-bit CMOS magnitude comparator IC that performs real-time A > B, A = B, and A < B comparisons on two parallel 4-bit binary words (A₀–A₃ and B₀–B₃), with cascading capability via three expander inputs (IA>B, IA<B, IA=B) for multi-word comparisons up to 16+ bits. It operates across 3 V to 15 V supply range, supports −40 °C to +85 °C ambient, and delivers propagation delays as low as 30 ns at 15 V with 50 pF load.
For engineers reviewing the HEF4585BP,652 datasheet, HEF4585BP,652 pinout, HEF4585BP,652 application, or HEF4585BP,652 equivalent, key selection considerations include its DIP16 package compatibility, monotonic-code agnostic operation, static CMOS architecture, cascaded timing behavior, and voltage-flexible output drive capability across industrial logic families.
Technical Context
The HEF4585BP,652 implements a fully static, cascadable 4-bit comparator using standard CMOS logic gates without internal latches or clocks. Its three outputs (QA>B, QA=B, QA<B) are mutually exclusive under valid input conditions and driven with symmetrical VOH/VOL characteristics across 5 V/10 V/15 V supply rails.
Cascading relies on hierarchical evaluation: least-significant device sets IA>B = IA=B = HIGH and IA<B = LOW; subsequent stages connect IA=B and IA<B to QA=B and QA<B of the prior stage, while IA>B remains HIGH. This enables deterministic 8-, 12-, or 16-bit comparisons without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 15 V - Enables direct interface with TTL, LSTTL, and wide-voltage CMOS systems without level-shifting. |
| Operating Temperature | −40 °C to +85 °C - Qualified for industrial-grade embedded control and process automation environments. |
| Propagation Delay (tPLH/tPHL) | 30 ns min at 15 V, 50 pF - Supports high-speed word comparison in real-time servo feedback loops. |
| Input Voltage Thresholds | VIH = 11.0 V, VIL = 4.0 V at VDD = 15 V - Ensures noise margin >2 V in noisy industrial settings. |
| Output Drive Strength | IOL = 2.4 mA, IOH = −2.4 mA at VDD = 15 V - Sufficient to directly drive multiple 74HC inputs or small LED indicators. |
| Input Capacitance | CI = 7.5 pF - Minimizes loading on upstream drivers and preserves signal integrity in dense PCB layouts. |
| Power Dissipation (DIP16) | Ptot = 750 mW - Allows sustained operation in through-hole mounted industrial modules without forced cooling. |
Pinout & Package
DIP16 plastic dual in-line package (300 mil, SOT38-4), 16-pin through-hole mount with 2.54 mm pitch, 19.5 mm × 6.5 mm body, and standard pin 1 index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 7, 10, 11, 14, 15 | A₀–A₃, B₀–B₃ | Parallel data inputs for 4-bit words A and B; A₃/B₃ are MSBs - must be driven with monotonic logic levels. |
| 3 | QA=B | Active-HIGH equality output - asserts only when all four bit pairs match; used as enable for downstream logic. |
| 4, 5, 6 | IA>B, IA<B, IA=B | Cascade control inputs - accept outputs from less-significant comparator to extend comparison width. |
| 8 | VSS | Ground reference - must be low-impedance connection; unused inputs tied here meet termination requirement. |
| 12, 13, 16 | QA<B, QA>B, VDD | Asymmetric output pair (QA<B/QA>B) and power rail - VDD requires local 100 nF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Fully static CMOS operation | No minimum clock frequency required - supports zero-static-current standby in battery-backed controllers. |
| Monotonic code compatibility | Functions correctly with Gray, excess-3, or custom weighted codes - not limited to pure binary. |
| Three-stage cascading support | Enables 8-, 12-, or 16-bit comparisons using identical HEF4585B devices - eliminates need for custom gate arrays. |
| JEDEC JESD13-B compliance | Guarantees interoperability with legacy 4000-series CMOS logic families and standardized test protocols. |
| Wide supply tolerance (3–15 V) | Permits single-rail operation in mixed-voltage systems - e.g., 5 V microcontroller interfacing to 12 V analog subsystems. |
Applications
| Process Controller Logic | Servo-Motor Position Comparator |
|---|---|
Use Scenario: Real-time comparison of setpoint vs. encoder feedback in PLC-based temperature or pressure control loops. IC Role / Device Role / Timing Role: Performs cycle-synchronous A = B detection to trigger PID correction pulses and A > B/A < B flags for directional actuator drive. Use Value: Eliminates software polling overhead and ensures sub-microsecond response to threshold breaches in closed-loop systems. |
Use Scenario: Monitoring absolute position error between commanded and actual motor shaft angle in industrial servos. IC Role / Device Role / Timing Role: Compares 4-bit segmented position words from resolver-to-digital converter with motion controller output. Use Value: Provides deterministic hardware-level trip signals for overtravel protection without CPU intervention or interrupt latency. |
| Multi-Channel Data Selector | Digital Test Equipment Comparator |
Use Scenario: Routing analog sensor channels based on digital address matching in modular DAQ systems. IC Role / Device Role / Timing Role: Cascaded HEF4585B units compare 12-bit channel IDs to select one of 16 ADC inputs via multiplexer control lines. Use Value: Enables glitch-free channel switching with hardware-enforced priority arbitration and no firmware dependency. |
Use Scenario: Bitwise pass/fail validation of DUT output against golden reference vectors in automated test fixtures. IC Role / Device Role / Timing Role: Generates QA=B assertion per 4-bit nibble; ANDed outputs indicate full 16-bit vector match. Use Value: Reduces test cycle time by replacing microcontroller-based comparison with parallel hardware evaluation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit magnitude comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4585BE | Same logic function and pinout; TI version with identical DIP16 package but ±0.3 V tighter VIH/VIL tolerances at 5 V. | Preferred in 5 V-only systems requiring higher noise immunity; lacks 15 V rating and extended temp range. | Select CD4585BE for cost-sensitive 5 V designs where 15 V operation and −40 °C start-up are unnecessary. |
| 74HC85N | High-speed CMOS variant; 20 ns typical delay at 5 V but limited to 2 V–6 V supply and non-cascadable IA inputs. | Used in compact 5 V digital systems needing faster response; requires external gates for >4-bit expansion. | Choose 74HC85N when speed outweighs supply flexibility and cascading simplicity in space-constrained layouts. |
Compared with CD4585BE and 74HC85N, the HEF4585BP,652 uniquely balances wide-voltage operation (3–15 V), industrial temperature range, and native multi-word cascading - making it optimal for legacy-compatible, mixed-rail, and field-deployable control hardware.
Availability
HEF4585BP,652 is available at Aetrix Electronics and suitable for industrial process controllers, servo-motor feedback systems, modular data acquisition units, and automated test equipment requiring stable component supply across long production lifecycles.
Supply support for HEF4585BP,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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in legacy logic and mixed-signal integration.
The HEF4585BP,652 belongs to NXP's HEF4000B series of high-voltage CMOS logic ICs, designed specifically for robustness in industrial control, instrumentation, and retrofit applications where wide supply range and temperature resilience are critical.
FAQ
What is the maximum supply voltage rating for the HEF4585BP,652?
The HEF4585BP,652 has an absolute maximum supply voltage (VDD) of +18 V per IEC 60134 limiting values, but its recommended operating range is 3 V to 15 V. Operating continuously above 15 V risks parametric shift and reduced reliability, even if within absolute max limits. The HEF4585BP,652 is specified for stable functionality only within the 3–15 V window across its full −40 °C to +85 °C temperature range.
How does the HEF4585BP,652 handle cascading for 8-bit comparisons?
For 8-bit comparison, two HEF4585BP,652 devices are cascaded: the LSB unit has IA>B = IA=B = HIGH and IA<B = LOW; its QA>B, QA=B, QA<B drive the corresponding IA inputs of the MSB unit, which uses IA>B = HIGH. The MSB unit's outputs reflect the full 8-bit result. This method requires no external gates and maintains deterministic timing per the propagation delay specs in the HEF4585BP,652 datasheet.
Can the HEF4585BP,652 operate with non-binary codes like Gray code?
Yes, the HEF4585BP,652 operates correctly with any monotonic code - including Gray, excess-3, or custom weighted encodings - because its internal logic evaluates relative bit magnitudes without assuming binary weighting. Table 3 in the HEF4585BP,652 datasheet confirms functional validity under all monotonic input sequences, provided input transitions respect the specified Δt/ΔV slew rate limits.
What is the recommended decoupling for the HEF4585BP,652 in a DIP16 layout?
A 100 nF X7R ceramic capacitor placed within 5 mm of pin 16 (VDD) and pin 8 (VSS) is recommended for the HEF4585BP,652. This minimizes supply rail noise during output transitions, especially critical at higher supply voltages (10 V/15 V) where dynamic current spikes increase. For multi-device boards, add a bulk 4.7 µF electrolytic near the power entry point to stabilize the local 3–15 V rail feeding all HEF4585BP,652 units.
Is the HEF4585BP,652 pin-compatible with the CD4585BE?
Yes, the HEF4585BP,652 is pin-compatible with the CD4585BE in DIP16 packages: both share identical pin assignments for A₀–A₃, B₀–B₃, QA>B, QA=B, QA<B, IA>B, IA<B, IA=B, VDD, and VSS. However, the HEF4585BP,652 supports 15 V operation and −40 °C to +85 °C, whereas the CD4585BE is rated only to 5 V and 0 °C to +70 °C - direct substitution requires verification of voltage and thermal margins in the target design.
HEF4585BP,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Magnitude Comparator
- Number of Bits:
- 4
- Output:
- Active High
- Output Function:
-
A
- Voltage - Supply:
- 3V ~ 15V
- Current - Output High, Low:
- 3mA, 3mA
- Max Propagation Delay @ V, Max CL:
- 90ns @ 15V, 50pF
- Current - Quiescent (Iq):
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-DIP
- Mounting Type:
- Through Hole
HEF4585BP,652 FAQ
1.How can I place an order for HEF4585BP,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for HEF4585BP,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 HEF4585BP,652 reliable?
The price and inventory of HEF4585BP,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HEF4585BP,652 is usually 5 days.
3.What payment methods are accepted for HEF4585BP,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HEF4585BP,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HEF4585BP,652?
HEF4585BP,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HEF4585BP,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 HEF4585BP,652?
For technical support, including HEF4585BP,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HEF4585BP,652 requirements.
6.How does Aetrix verify that HEF4585BP,652 is sourced from the original manufacturer or authorized distributors?
All HEF4585BP,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 HEF4585BP,652 meets industry standards.
7.What is the process for return or replacement of HEF4585BP,652?
All HEF4585BP,652 units undergo pre-shipment inspection (PSI). If there is an issue with HEF4585BP,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 HEF4585BP,652 part is unused and in its original packaging.
Return procedure for HEF4585BP,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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