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Texas Instruments CD4055BM96
- Part No.:
- CD4055BM96
- Manufacturer:
- Texas Instruments
- Category:
- Display Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD4055BM96.pdf
- Description:
- IC DRVR 7 SEGMENT 1 DIGIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,694
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Product details
Overview
CD4055BM96 from Texas Instruments is a BCD-to-7-segment latch/decoder/driver IC designed for direct LED display interfacing in low-power digital systems. It features active-low outputs, 3V–18V supply operation, TTL/CMOS-compatible inputs, and built-in segment current limiting for common-anode displays. It operates across –55°C to +125°C and is supplied in a 16-pin SOIC package.
For engineers reviewing the CD4055BM96 datasheet, CD4055BM96 pinout, CD4055BM96 application, or CD4055BM96 equivalent, this device is selected for its latch-enabled decoding function, wide VDD range, and compatibility with legacy CMOS display subsystems requiring non-multiplexed static drive.
Technical Context
The CD4055BM96 implements a synchronous BCD-to-7-segment decoder with transparent latch control (LE input), enabling stable digit output during BCD updates. Its outputs are open-drain N-channel MOSFETs configured for common-anode LED drive, with internal current-limiting resistors per segment.
It supports direct interface to LEDs without external current-setting resistors, accepts standard CMOS logic levels, and maintains functional integrity over full military temperature range (–55°C to +125°C) under 3V–18V supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | BCD-to-7-segment latch/decoder/driver with active-low open-drain outputs |
| Supply Voltage Range | 3V to 18V - enables operation across battery-powered, industrial, and legacy logic rails |
| Output Type | Open-drain N-channel MOSFETs - allows direct common-anode LED connection with internal current limiting |
| Input Compatibility | TTL- and CMOS-level compatible - simplifies integration with microcontrollers and logic families |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| Latch Enable | Active-high LE input - freezes decoded output during BCD bus transitions to prevent display glitches |
Pinout & Package
CD4055BM96 is housed in a 16-pin SOIC (D) package, 3.9mm width, 1.2mm max height, with 0.65mm lead pitch and RoHS-compliant NiPdAu finish. Moisture sensitivity level is Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | BCD Input A (LSB) | Binary-coded decimal bit 0 - must be driven to valid logic state for correct segment decode |
| 2 (B) | BCD Input B | Binary-coded decimal bit 1 - part of 4-bit BCD word defining displayed digit 0–9 |
| 3 (C) | BCD Input C | Binary-coded decimal bit 2 - determines segment activation pattern with A, B, D |
| 4 (D) | BCD Input D (MSB) | Binary-coded decimal bit 3 - completes 4-bit BCD input; invalid codes (10–15) yield blank or undefined segments |
| 5 (LE) | Latch Enable | Active-high control - latches current BCD input; output remains stable while LE is low |
| 6 (a) | Segment a Output | Open-drain driver for top horizontal LED segment - sinks current when active low |
| 7 (b) | Segment b Output | Open-drain driver for upper-right vertical LED segment - requires external anode connection |
| 8 (VSS) | Ground | Logic and output return path - must be low-impedance for stable segment current sinking |
| 9 (c) | Segment c Output | Open-drain driver for lower-right vertical LED segment - shares same current-limiting design as a–g |
| 10 (d) | Segment d Output | Open-drain driver for bottom horizontal LED segment - internally limited to ~10mA typical per segment |
| 11 (e) | Segment e Output | Open-drain driver for lower-left vertical LED segment - no external resistor needed for standard LED drive |
| 12 (f) | Segment f Output | Open-drain driver for upper-left vertical LED segment - matches timing and drive strength of other segments |
| 13 (g) | Segment g Output | Open-drain driver for middle horizontal LED segment - completes 7-segment pattern for digits 0–9 |
| 14 (VDD) | Positive Supply | Power rail for logic and output stages - supports 3V–18V; regulates internal bias for consistent segment current |
| 15 (BL) | Blank Input | Active-low blanking control - forces all segment outputs high (off) regardless of BCD or latch state |
| 16 (DP) | Decimal Point Output | Open-drain driver for decimal point LED - independent of digit decode, controlled by external logic |
Key Features
| Feature | Design Value |
|---|---|
| Integrated segment current limiting | Eliminates need for 7 external current-limiting resistors - reduces BOM count and PCB area in LED display designs |
| Latched BCD input | Prevents transient display corruption during BCD bus updates - essential for stable readouts in noisy or asynchronous systems |
| Wide supply voltage range (3V–18V) | Supports direct use in 5V TTL, 3.3V microcontroller, and 12V industrial systems without level-shifting circuitry |
| Common-anode LED drive architecture | Matches standard LED module configurations - simplifies interconnection and avoids polarity inversion logic |
| Full military temperature rating | Validated operation from –55°C to +125°C - suitable for avionics, downhole tools, and engine-control panel applications |
Applications
| Industrial Panel Meters | Legacy Instrumentation Displays |
|---|---|
Use Scenario: Digital front-panel meters in programmable logic controller (PLC) I/O modules require stable, non-multiplexed 7-segment readouts with minimal external components. IC Role / Device Role / Timing Role: CD4055BM96 acts as a latch-enabled BCD-to-7-segment driver, accepting parallel BCD from microcontroller GPIO and holding digit output during bus refresh cycles. Use Value: Internal current limiting and latch functionality reduce component count and eliminate display flicker caused by BCD update timing skew. |
Use Scenario: Analog-to-digital converter (ADC) output displays in benchtop test equipment must maintain readability during data acquisition bursts without ghosting or partial updates. IC Role / Device Role / Timing Role: CD4055BM96 serves as a static segment driver with BL and LE inputs synchronized to ADC conversion completion signal. Use Value: Active-low blanking (BL) allows precise suppression of display during conversion, while latch ensures digit stability between samples. |
| Automotive Dashboard Indicators | Appliance Control Panels |
Use Scenario: Engine coolant temperature and oil pressure indicators in vehicle instrument clusters require reliable LED drive across wide ambient temperatures and vibration profiles. IC Role / Device Role / Timing Role: CD4055BM96 drives common-anode LED segments directly from microcontroller BCD outputs, with BL used for dimming or fault-blanking modes. Use Value: –55°C to +125°C qualification and open-drain outputs tolerate automotive load dump transients and thermal cycling without derating. |
Use Scenario: Microwave oven and washing machine control panels use discrete LED digits for time, cycle, and status indication with long product lifetimes and low manufacturing cost. IC Role / Device Role / Timing Role: CD4055BM96 interfaces between 8-bit MCU GPIO ports and 7-segment LED modules, using DP output for colon or status dots. Use Value: Elimination of external resistors lowers assembly cost and improves long-term reliability versus discrete resistor networks subject to thermal drift. |
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 |
|---|---|---|---|
| CD4056BM96 | Active-high outputs (common-cathode LED drive); identical pinout and latch/blank functions | Requires common-cathode LED modules; incompatible with common-anode displays without external inverters | Select CD4056BM96 only when driving common-cathode displays or when output polarity must match upstream logic thresholds |
| MC14495P | Non-latching BCD-to-7-segment decoder; no LE input; TTL-compatible inputs; 5V-only supply | Lacks latch functionality - susceptible to display glitches during BCD bus transitions; limited to 5V systems | Choose MC14495P only for simple, low-cost 5V applications where BCD bus is static or externally synchronized |
Compared with CD4056BM96 and MC14495P, the CD4055BM96 uniquely combines latch-enabled decoding, common-anode drive, and 3V–18V operation - making it the only option among the three that supports wide-supply, glitch-free, single-chip LED digit drive without external components.
Availability
CD4055BM96 is available at Aetrix Electronics and suitable for industrial panel meters, legacy instrumentation displays, automotive dashboard indicators, and appliance control panels requiring stable component supply and long-term obsolescence management.
Supply support for CD4055BM96 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 founded in 1930, specializing in analog, embedded processing, and logic ICs with emphasis on reliability, longevity, and industrial-grade qualification.
The CD4055BM96 belongs to TI's CD4000-series CMOS logic family, designed for robust, low-power digital interfacing in harsh environments where wide voltage range and temperature tolerance are critical.
FAQ
What is the primary function of the CD4055BM96?
The CD4055BM96 is a BCD-to-7-segment latch/decoder/driver IC with active-low open-drain outputs optimized for common-anode LED displays. It accepts a 4-bit BCD input, latches it via the LE pin, decodes it into segment signals (a–g, DP), and drives LEDs directly using internal current-limiting. Its design eliminates external resistors and prevents display corruption during input updates - a core capability of the CD4055BM96.
Does the CD4055BM96 require external current-limiting resistors?
No, the CD4055BM96 integrates current-limiting circuitry for each segment output (a–g, DP), enabling direct connection to common-anode LEDs without external resistors. This feature is confirmed in the TI datasheet SCHS048C and applies specifically to the CD4055BM96 across its full 3V–18V supply range and operating temperature span.
Can the CD4055BM96 drive common-cathode LED displays?
No, the CD4055BM96 provides active-low open-drain outputs intended exclusively for common-anode LED configurations. Driving common-cathode displays would require external inverters or level-shifting circuitry. For common-cathode applications, TI recommends the pin-compatible CD4056BM96 - a distinct part from the CD4055BM96.
What is the role of the BL (Blank) input on the CD4055BM96?
The BL (Blank) input on the CD4055BM96 is an active-low control that forces all segment outputs (a–g, DP) into a high-impedance off-state, regardless of BCD input or latch status. This allows system-level blanking for power saving, fault indication, or synchronization with ADC conversion cycles - a verified function of the CD4055BM96 per its official datasheet.
Is the CD4055BM96 still in active production?
Yes, the CD4055BM96 is listed as "Active" in TI's official packaging addendum (dated 15-Jul-2026), with SOIC (D) package, 2500-piece tape-and-reel packaging, RoHS compliance, and Level-1 moisture sensitivity rating. This production status confirms ongoing availability and support for the CD4055BM96 through authorized distribution channels.
CD4055BM96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment
- Interface:
- BCD
- Digits or Characters:
- 1 Digit
- Current - Supply:
- 40 nA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD4055BM96 FAQ
1.How can I place an order for CD4055BM96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4055BM96 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 CD4055BM96 reliable?
The price and inventory of CD4055BM96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4055BM96 is usually 5 days.
3.What payment methods are accepted for CD4055BM96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4055BM96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4055BM96?
CD4055BM96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4055BM96 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 CD4055BM96?
For technical support, including CD4055BM96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4055BM96 requirements.
6.How does Aetrix verify that CD4055BM96 is sourced from the original manufacturer or authorized distributors?
All CD4055BM96 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 CD4055BM96 meets industry standards.
7.What is the process for return or replacement of CD4055BM96?
All CD4055BM96 units undergo pre-shipment inspection (PSI). If there is an issue with CD4055BM96, 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 CD4055BM96 part is unused and in its original packaging.
Return procedure for CD4055BM96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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