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Texas Instruments CD4585BEG4
- Part No.:
- CD4585BEG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4585BEG4.pdf
- Description:
- IC COMPARATOR MAG 4BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,324
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Product details
Overview
CD4585BEG4 from Texas Instruments is a CMOS 4-bit magnitude comparator IC that performs high-speed A=B, A<B, and A>B comparisons across two 4-bit binary words. It operates over a wide supply range (3 V to 18 V), features TTL- and CMOS-compatible inputs, and delivers rail-to-rail output swing - enabling direct interface with logic families in industrial control panels and digital instrumentation systems.
For engineers reviewing the CD4585BEG4 datasheet, CD4585BEG4 pinout, CD4585BEG4 application, or CD4585BEG4 equivalent, this device is selected for deterministic digital comparison tasks requiring low static power, wide voltage tolerance, and compatibility with legacy 4000-series logic architectures.
Technical Context
The CD4585BEG4 implements cascaded comparison logic using hierarchical bit-wise evaluation: lower-order bits are compared first, and results propagate through dedicated A<B, A=B, and A>B cascade inputs/outputs to support multi-word expansion. Its fully static CMOS design ensures zero DC current draw at steady state and immunity to race conditions during asynchronous input transitions.
Input thresholds scale with VDD, supporting operation from 3 V to 18 V while maintaining noise margins ≥45% of VDD. Propagation delays (tPHL/tPLH) are specified at 120 ns max at 5 V and 70 ns at 15 V, with output drive capability of ±4.2 mA at VDD = 15 V - sufficient to directly drive LED indicators or TTL fan-in loads without buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 4-bit magnitude comparator with cascading A<B, A=B, A>B outputs |
| Supply Voltage Range | 3 V to 18 V - enables single-supply operation in mixed-voltage systems |
| Propagation Delay | 70 ns at VDD = 15 V - supports timing-critical digital control loops up to ~10 MHz effective throughput |
| Output Drive | ±4.2 mA at VDD = 15 V - drives 10 TTL loads or LEDs directly without external buffers |
| Input Compatibility | TTL- and CMOS-level compatible - simplifies integration with 74HC, 74LS, and other 4000-series devices |
| Quiescent Current | 100 nA typical at 25°C - enables battery-backed or ultra-low-power monitoring applications |
Pinout & Package
CD4585BEG4 is supplied in a 16-lead plastic dual-in-line package (PDIP-N), 25-piece tube format, with standard 0.3-inch body width and 0.1-inch lead pitch. Pin 1 is located at the left end of the top row, identified by a notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A<B Cascade Input | Accepts result from less-significant comparator stage to enable multi-bit chaining |
| 2 | A=B Cascade Input | Propagates equality status from lower-order bits for full-word comparison |
| 3 | A>B Cascade Input | Receives greater-than result from prior stage to maintain hierarchical evaluation |
| 4–7 | A0–A3 Inputs | 4-bit word A (LSB to MSB order) - accepts active-HIGH logic levels |
| 8 | VSS | Ground reference for all internal circuitry and I/O pins |
| 9–12 | B0–B3 Inputs | 4-bit word B (LSB to MSB order) - electrically identical to A inputs |
| 13 | A>B Output | Active-HIGH assertion when A word exceeds B word |
| 14 | A=B Output | Active-HIGH only when all four bit pairs match exactly |
| 15 | A<B Output | Active-HIGH when A word is numerically smaller than B word |
| 16 | VDD | Positive supply rail - powers all gates and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3 V to 18 V operation - eliminates need for level shifters in hybrid-voltage systems |
| Cascadable Architecture | Dedicated A<B, A=B, A>B I/O pins - enables seamless expansion to 8-, 12-, or 16-bit comparisons |
| CMOS Static Design | Zero static current draw - critical for battery-powered or energy-harvesting applications |
| High Noise Immunity | Input hysteresis and rail-scaled thresholds - ensures reliable operation in electrically noisy industrial environments |
| Direct TTL Interface | Output voltage swing spans VSS to VDD - drives standard TTL inputs without pull-up resistors |
Applications
| Industrial PLC Logic Modules | Digital Panel Meters |
|---|---|
Use Scenario: Comparing sensor-derived setpoint values against real-time process readings in ladder-logic execution cycles. IC Role / Device Role / Timing Role: Performs deterministic 4-bit word comparison within fixed scan-time windows to trigger relay outputs or alarm states. Use Value: Guaranteed propagation delay ≤70 ns at 15 V ensures sub-microsecond decision latency - meeting IEC 61131-3 cycle-time requirements for safety-rated controllers. | Use Scenario: Converting analog-to-digital converter outputs into visual numeric displays with threshold-based color coding (e.g., green/yellow/red zones). IC Role / Device Role / Timing Role: Compares digitized measurement against preloaded limit registers to assert segment-driver enable signals. Use Value: Rail-to-rail CMOS outputs directly drive common-anode LED segments without current-limiting resistors or external transistors. |
| Legacy Test Equipment Interfaces | Automated Calibration Systems |
Use Scenario: Validating DUT response codes against expected signature patterns during functional test sequences. IC Role / Device Role / Timing Role: Acts as pattern matcher between captured response data and golden reference vectors stored in discrete latch banks. Use Value: Cascadable A=B output allows multi-byte signature verification using minimal board space and zero FPGA resources. | Use Scenario: Verifying DAC output accuracy by comparing successive approximations against known reference voltages digitized via SAR ADC. IC Role / Device Role / Timing Role: Serves as error detector in closed-loop calibration routines, asserting mismatch flags used to adjust gain/offset coefficients. Use Value: Ultra-low quiescent current (100 nA) prevents loading of precision voltage references during standby phases of calibration sequences. |
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 |
|---|---|---|---|
| CD4063BE | Same function and pinout; identical 3–18 V supply range but higher typical propagation delay (150 ns @ 5 V) | Lower speed margin may limit use in fast-scan industrial sequencers | Select when cost sensitivity outweighs timing requirements and legacy stock exists |
| 74HC85PW | Higher speed (18 ns @ 4.5 V) but narrower 2–6 V supply range; requires level translation for 12 V systems | Not suitable for direct replacement in mixed-voltage or high-VDD (>6 V) designs | Choose for new 3.3 V/5 V-only designs demanding faster comparison throughput |
Compared with CD4585BEG4, CD4063BE offers identical functionality at lower cost but sacrifices speed, while 74HC85PW delivers superior timing performance yet restricts system voltage architecture - making CD4585BEG4 the optimal choice for wide-supply, cascaded, and legacy-compatible comparator implementations.
Availability
CD4585BEG4 is available at Aetrix Electronics and suitable for industrial PLC logic modules, digital panel meters, and legacy test equipment interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4585BEG4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in industrial-grade CMOS technology.
The CD4585BEG4 belongs to TI's CD4000B series of buffered, high-voltage CMOS logic devices - engineered specifically for ruggedized digital control, instrumentation, and interface applications where reliability across extreme temperatures and supply variations is essential.
FAQ
What is the maximum operating frequency supported by the CD4585BEG4?
The CD4585BEG4 is not a clocked sequential device and does not have a defined maximum operating frequency. Its performance is governed by propagation delay: 70 ns at VDD = 15 V and 120 ns at VDD = 5 V. In practice, the CD4585BEG4 supports comparison rates up to approximately 10 MHz in tightly timed combinatorial paths, assuming clean signal edges and proper layout. System-level timing must account for worst-case cascaded delays when multiple CD4585BEG4 devices are linked.
Does the CD4585BEG4 require external pull-up resistors on its outputs?
No, the CD4585BEG4 does not require external pull-up resistors. Its CMOS totem-pole outputs provide rail-to-rail swing (VSS to VDD) with ±4.2 mA drive strength at 15 V, enabling direct interfacing with TTL inputs, LEDs, or logic gates. Pull-ups are unnecessary unless driving open-collector loads or implementing wired-OR configurations - which are not standard usage modes for the CD4585BEG4.
Can the CD4585BEG4 be used to compare signed 4-bit numbers?
The CD4585BEG4 performs unsigned binary magnitude comparison only. To compare signed (two's complement) 4-bit values, external logic must preprocess the most significant bits (MSBs) to generate corrected A and B inputs - for example, by XOR-ing sign bits with magnitude bits before presentation to the CD4585BEG4. The CD4585BEG4 itself has no built-in signed arithmetic mode or sign-aware logic.
Is the CD4585BEG4 RoHS compliant?
Yes, the CD4585BEG4 is RoHS compliant. Per Texas Instruments' packaging documentation, the PDIP-N variant (suffix E) carries NIPDAU lead finish and is marked "Yes" under RoHS in the official packaging addendum. This applies to all active orderable versions including CD4585BE, CD4585BE.A, and CD4585BEE4 - confirming full compliance with EU Directive 2011/65/EU and related amendments.
What is the meaning of the "G4" suffix in CD4585BEG4?
The "G4" suffix in CD4585BEG4 indicates a Green (lead-free, halogen-free) packaging variant per Texas Instruments' internal part numbering convention. It denotes compliance with TI's enhanced environmental standards, including exemption from brominated flame retardants and strict limits on antimony, phosphorus, and chlorine content - while retaining identical electrical specifications, pinout, and thermal behavior as the base CD4585BE part.
CD4585BEG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Type:
- Magnitude Comparator
- Number of Bits:
- 4
- Output:
- Active High
- Output Function:
-
A
- Voltage - Supply:
- 3V ~ 18V
- Current - Output High, Low:
- 4.2mA, 4.2mA
- Max Propagation Delay @ V, Max CL:
- 160ns @ 15V, 50pF
- Current - Quiescent (Iq):
- 100 µA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
CD4585BEG4 FAQ
1.How can I place an order for CD4585BEG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4585BEG4 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 CD4585BEG4 reliable?
The price and inventory of CD4585BEG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4585BEG4 is usually 5 days.
3.What payment methods are accepted for CD4585BEG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4585BEG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4585BEG4?
CD4585BEG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4585BEG4 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 CD4585BEG4?
For technical support, including CD4585BEG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4585BEG4 requirements.
6.How does Aetrix verify that CD4585BEG4 is sourced from the original manufacturer or authorized distributors?
All CD4585BEG4 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 CD4585BEG4 meets industry standards.
7.What is the process for return or replacement of CD4585BEG4?
All CD4585BEG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4585BEG4, 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 CD4585BEG4 part is unused and in its original packaging.
Return procedure for CD4585BEG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD4585BEG4 Tags
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SN74HC688PWR
Texas Instruments
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74HC85PW,118
Nexperia USA Inc.
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74HC688D,653
Nexperia USA Inc.
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SN74F521DWR
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CD74HCT688M96
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SN74F521N
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CD4585BE
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SN74HC688DWR
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SN74LS85DR
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CD74HC85E
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MC14585BDR2G
onsemi
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SN74HC688N
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