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Texas Instruments CD4511BNS
- Part No.:
- CD4511BNS
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
CD4511BNS.pdf
- Description:
- IC 7-SEG LED DECOD/DRVR 16SO
- Quantity:
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Inventory:3,150
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Product details
Overview
CD4511BNS from Texas Instruments is a BCD-to-7-segment latch/decoder/driver IC designed for direct LED display interfacing. It features active-low Lamp Test (LT), Blanking (BL), and Latch Enable (LE) inputs, operates over –55°C to +125°C, supports 3V–18V supply, and drives common-cathode displays with TTL/CMOS-compatible inputs.
For engineers reviewing the CD4511BNS datasheet, CD4511BNS pinout, CD4511BNS application, or CD4511BNS equivalent, key selection considerations include its latch-enabled BCD decoding, high-voltage open-drain segment outputs, integrated blanking and test control, and compatibility with legacy 4500-series logic in industrial panel meters and digital instrumentation.
Technical Context
The CD4511BNS implements a synchronous 4-bit BCD input decoder with internal latching, enabling stable segment output during multiplexed display operation. Its LE input controls data capture timing, while LT and BL provide independent display-level diagnostics and intensity control.
It uses standard CMOS silicon gate technology with buffered outputs capable of sourcing up to 10 mA per segment at VDD = 15 V. Input thresholds are referenced to VDD/2, ensuring robust noise immunity across the full supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - Enables direct interface with legacy 5 V, 12 V, and battery-powered systems without level-shifting. |
| Input Logic Compatibility | TTL and CMOS - Accepts standard logic-high/low thresholds across wide VDD, simplifying integration with microcontrollers and discrete logic. |
| Output Drive Capability | 10 mA sink per segment at VDD = 15 V - Directly drives common-cathode LED segments without external transistors. |
| Latch Enable Polarity | Active-low (LE̅) - Synchronizes BCD code capture on falling edge, supporting strobed data transfer in time-multiplexed displays. |
| Operating Temperature | –55°C to +125°C - Qualified for extended industrial and aerospace environments where thermal stability is critical. |
| Package Type | 16-pin SOIC (NS suffix) - Surface-mount footprint compatible with automated assembly and space-constrained front-panel designs. |
Pinout & Package
CD4511BNS is housed in a 16-pin small-outline integrated circuit (SOIC) package (NS drawing), 3.9 mm body width, 1.2 mm max height, RoHS-compliant with NIPDAU lead finish and Level-1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | BCD Input A (LSB) | Least-significant BCD bit; sampled on LE̅ low-to-high transition when latched. |
| 2 (B) | BCD Input B | Second BCD bit; determines segment activation pattern with A, C, D for digits 0–9. |
| 3 (C) | BCD Input C | Third BCD bit; part of 4-bit binary-coded decimal input bus driving decoded outputs a–g. |
| 4 (D) | BCD Input D (MSB) | Most-significant BCD bit; completes 4-bit code; invalid codes (10–15) disable all segments. |
| 5 (LE̅) | Latch Enable (active-low) | Controls data capture: latches current BCD inputs when pulled low, holds output stable when high. |
| 6 (BL̅) | Blanking Input (active-low) | Forces all segment outputs low regardless of BCD input - used for display dimming or off-state control. |
| 7 (LT̅) | Lamp Test Input (active-low) | Overrides BL̅ and LE̅ to force all segments high - verifies LED continuity and driver functionality. |
| 8 (VSS) | Ground | Reference return for all logic and output circuits; must be connected to system ground plane. |
| 9 (a) | Segment a Output | Open-drain output driving LED segment 'a'; requires external pull-up to VDD or current-limiting resistor. |
| 10 (b) | Segment b Output | Drives segment 'b'; identical electrical behavior to pin 9 - supports common-cathode LED configuration. |
| 11 (c) | Segment c Output | Drives segment 'c'; outputs are mutually exclusive per digit - no internal current limiting. |
| 12 (d) | Segment d Output | Drives segment 'd'; each segment output rated for 10 mA sink at VDD = 15 V. |
| 13 (e) | Segment e Output | Drives segment 'e'; compatible with multiplexed displays when coordinated with external timing logic. |
| 14 (f) | Segment f Output | Drives segment 'f'; output state determined solely by latched BCD value and BL̅/LT̅ status. |
| 15 (g) | Segment g Output | Drives segment 'g'; completes 7-segment decode map; disabled for invalid BCD inputs (10–15). |
| 16 (VDD) | Positive Supply | Power rail for logic core and output drivers; decoupling capacitor required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated latch function | Eliminates need for external D-latch; enables stable segment output during BCD bus updates in multiplexed systems. |
| Dedicated lamp test input | Single-pin hardware verification of entire display path - no firmware or external test equipment required. |
| Active-low blanking control | Allows precise intensity modulation or complete display shutdown without altering BCD data or latch state. |
| Wide supply voltage range | Supports direct operation from unregulated 12 V rails or battery-backed 3.3 V/5 V systems without regulators. |
| High-voltage open-drain outputs | Enables driving LEDs at voltages exceeding logic supply - e.g., 12 V segments from 5 V microcontroller logic. |
Applications
| Industrial Panel Meters | Digital Multimeters |
|---|---|
Use Scenario: Front-panel 4-digit LED readout in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: BCD-to-7-segment latch/decoder driving common-cathode displays under microcontroller control with multiplexed refresh. Use Value: Latch Enable synchronizes digit updates to avoid ghosting; BL̅ enables dynamic brightness scaling via PWM on shared cathode lines. | Use Scenario: Dual-display unit showing measured voltage and current simultaneously using time-shared BCD buses. IC Role / Device Role / Timing Role: Segment driver with independent LT̅ and BL̅ for self-test and auto-ranging display blanking during range switching. Use Value: Lamp Test confirms LED integrity before measurement cycle; latch holds digit while ADC conversion completes. |
| Battery-Powered Test Equipment | Aerospace Instrumentation Displays |
Use Scenario: Portable oscilloscope auxiliary display showing trigger level, timebase, and voltage scale settings. IC Role / Device Role / Timing Role: Low-power BCD decoder operating from 3.3 V Li-ion supply, interfacing to 7-segment LEDs with series resistors. Use Value: 3 V minimum supply allows direct battery connection; wide temp range ensures readability in outdoor field conditions. | Use Scenario: Cockpit altimeter and airspeed indicator with redundant LED readouts meeting MIL-STD-810F thermal cycling. IC Role / Device Role / Timing Role: Radiation-tolerant display driver in qualified CD4511B-MIL derivative, used with latch-controlled multiplexing. Use Value: –55°C to +125°C rating supports operation in pressurized avionics bays; latch prevents display corruption during EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BCD-to-7-segment latch/decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC14511BDR2G | Pinout-identical, same SOIC-16 package, identical BCD decode/latch/blank/test functions; ON Semiconductor version with slightly tighter propagation delay specs. | No functional change in display interface; identical timing behavior enables drop-in replacement in existing PCB layouts. | Select when sourcing from ON Semi distribution channels or requiring alternate qualification documentation. |
| CD4543BE | Supports both common-cathode and common-anode displays via mode-select pin; lacks dedicated LT̅ input; uses different segment output polarity logic. | Requires redesign of LED biasing and control logic; not suitable for lamp test–dependent diagnostic systems. | Choose only for new designs needing dual-display-type flexibility and where lamp test is not required. |
Compared with MC14511BDR2G and CD4543BE, the CD4511BNS offers guaranteed lamp test functionality and proven layout compatibility with legacy 4500-series designs, making it optimal for maintenance of fielded industrial instrumentation where diagnostic reliability is mandatory.
Availability
CD4511BNS is available at Aetrix Electronics and suitable for industrial panel meters, digital multimeters, and battery-powered test equipment requiring stable component supply and long-term obsolescence management.
Supply support for CD4511BNS 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The CD4511BNS belongs to TI's legacy CMOS 4000B/4500B logic family, engineered specifically for robust, low-power digital display interfacing in harsh-environment instrumentation and control systems.
FAQ
What is the maximum supply voltage the CD4511BNS can tolerate?
The CD4511BNS is rated for operation up to 18 V DC on VDD, with absolute maximum ratings specifying 20 V as the non-repetitive limit. Operation above 18 V risks permanent damage to internal oxide layers. The CD4511BNS maintains full functionality across the 3 V to 18 V range, including correct segment decoding, latch behavior, and LT̅/BL̅ response, verified per SCHS072B datasheet Section 6.1.
Does the CD4511BNS support common-anode LED displays?
No, the CD4511BNS is designed exclusively for common-cathode LED displays. Its segment outputs (pins 9–15) are open-drain and sink current - they must be pulled up to VDD to illuminate segments. Driving common-anode displays would require external inverters or a different IC such as the CD4543BE. This limitation is explicitly stated in the Functional Description section of the CD4511BNS datasheet.
How does the Lamp Test (LT̅) function interact with the Blanking (BL̅) input on the CD4511BNS?
On the CD4511BNS, LT̅ has priority over BL̅: when LT̅ is asserted (low), all segment outputs (a–g) are forced high regardless of BL̅ state or latched BCD value. This override behavior is hardwired and documented in the Truth Table (Table 1) of SCHS072B. BL̅ only takes effect when LT̅ is inactive (high), allowing normal blanking control during operation.
Is the CD4511BNS pin-compatible with the CD4511BE PDIP version?
Yes, the CD4511BNS (SOIC-16) and CD4511BE (PDIP-16) share identical pin numbering, signal assignment, and electrical functionality. Both follow the NS package drawing for SO and N for PDIP, with matching pin 1 index location and signal mapping per datasheet Figure 1. This allows direct PCB footprint substitution when migrating from through-hole to surface-mount assembly, provided board layout accommodates SOIC dimensions.
What is the purpose of the Latch Enable (LE̅) input on the CD4511BNS?
The Latch Enable (LE̅) input on the CD4511BNS controls when the 4-bit BCD input (A–D) is captured and held. When LE̅ transitions low, the current BCD value is latched; subsequent changes to A–D have no effect until LE̅ goes high again. This prevents display flicker or partial updates during BCD bus transitions and is essential for reliable operation in multiplexed or microcontroller-driven displays - a core feature confirmed in the CD4511BNS functional description and timing diagrams.
CD4511BNS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Circuit:
- -
- Independent Circuits:
- -
- Current - Output High, Low:
- -
- Voltage Supply Source:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CD4511BNS FAQ
1.How can I place an order for CD4511BNS through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4511BNS 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 CD4511BNS reliable?
The price and inventory of CD4511BNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4511BNS is usually 5 days.
3.What payment methods are accepted for CD4511BNS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4511BNS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4511BNS?
CD4511BNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4511BNS 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 CD4511BNS?
For technical support, including CD4511BNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4511BNS requirements.
6.How does Aetrix verify that CD4511BNS is sourced from the original manufacturer or authorized distributors?
All CD4511BNS 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 CD4511BNS meets industry standards.
7.What is the process for return or replacement of CD4511BNS?
All CD4511BNS units undergo pre-shipment inspection (PSI). If there is an issue with CD4511BNS, 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 CD4511BNS part is unused and in its original packaging.
Return procedure for CD4511BNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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