Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Display Drivers

Texas Instruments CD4056BMG4

Name: CD4056BMG4
Brand: Texas Instruments
SKU: CD4056BMG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CD4056BMG4

Manufacturer:: Texas Instruments

Category:: Display Drivers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: CD4056BMG4.pdf

Description:: IC DRVR 7 SEGMENT 1 DIGIT 16SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,809

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CD4056BMG4 from Texas Instruments is a BCD-to-7-segment latch/decoder/driver IC designed for direct LED display interfacing. It accepts 4-bit BCD input, latches data, decodes to seven-segment outputs (a–g), and drives common-cathode LED displays with sink-current capability up to 10 mA per segment. Operating from 3 V to 18 V, it features TTL-compatible inputs and internal segment blanking control via the BL̅ pin.

For engineers reviewing the CD4056BMG4 datasheet, CD4056BMG4 pinout, CD4056BMG4 application, or CD4056BMG4 equivalent, key selection considerations include its single-supply operation, built-in latch function eliminating external storage, segment current drive capability, active-low blanking, and compatibility with common-cathode displays in industrial panel meters and legacy instrumentation.

Technical Context

The CD4056BMG4 integrates a D-type latch, BCD-to-7-segment decoder, and high-current segment drivers in a single 16-pin SOIC package. Its latch enables synchronous data capture from multiplexed or asynchronous BCD sources, while the decoder implements standard 7-segment mapping (with "6" and "9" including upper/lower bars) and includes lamp test (LT̅) and blanking (BL̅) control inputs.

It operates across the full 3 V–18 V supply range with CMOS-level input thresholds and provides segment output voltage swing within 0.5 V of V_SS when sinking 10 mA - enabling direct interface to LEDs without external current-limiting resistors in low-voltage configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 18 V - supports battery-powered and industrial rail systems without level-shifting.
Segment Output Sink Current	10 mA per output - sufficient to directly drive standard common-cathode LEDs at moderate brightness.
Input Logic Compatibility	TTL-compatible thresholds - interfaces directly with 5 V logic families without pull-ups or translators.
Lamp Test Function	Active-low LT̅ input forces all segments ON - enables rapid visual verification of display integrity.
Blanking Control	Active-low BL̅ disables all segment outputs - supports time-multiplexed display driving and power gating.
Propagation Delay (typ.)	120 ns at 5 V - suitable for static and low-frequency multiplexed displays (≤1 kHz refresh).

Pinout & Package

CD4056BMG4 is housed in a 16-pin SOIC (D) package with 1.27 mm pitch, 3.9 mm body width, and 1.2 mm maximum height - compatible with standard surface-mount reflow profiles (MSL Level-1).

Pin/Terminal	Circuit Role	Design Meaning
1 (A)	BCD Input A (LSB)	Accepts least-significant bit of 4-bit binary-coded decimal input.
2 (B)	BCD Input B	Second bit of BCD input; latched on rising edge of LE.
3 (C)	BCD Input C	Third bit of BCD input; determines segment activation pattern.
4 (D)	BCD Input D (MSB)	Most-significant bit; completes 4-bit BCD word for digit decoding.
5 (LE)	Latch Enable	Positive-edge-triggered clock; captures BCD inputs into internal register.
6 (BL̅)	Blanking Input	Active-low signal that forces all segment outputs LOW, disabling display.
7 (LT̅)	Lamp Test Input	Active-low signal overrides decoding to turn ON all segments simultaneously.
8 (V_SS)	Ground	Reference return for logic and segment driver circuits.
9 (g)	Segment g Output	Sinks current to drive bottom horizontal bar of 7-segment display.
10 (f)	Segment f Output	Sinks current to drive upper-left vertical bar.
11 (e)	Segment e Output	Sinks current to drive lower-left vertical bar.
12 (d)	Segment d Output	Sinks current to drive bottom horizontal bar (shared with g in some fonts).
13 (c)	Segment c Output	Sinks current to drive lower-right vertical bar.
14 (b)	Segment b Output	Sinks current to drive upper-right vertical bar.
15 (a)	Segment a Output	Sinks current to drive top horizontal bar.
16 (V_DD)	Positive Supply	Single power rail supporting full 3–18 V operating range.

Key Features

Feature	Design Value
Integrated latch + decoder + driver	Eliminates need for separate storage and logic stages - reduces component count in digit-display subsystems.
Common-cathode LED drive	Direct segment sinking simplifies PCB layout and removes requirement for external transistor arrays or resistive networks.
Wide supply range (3–18 V)	Enables use in both low-power portable instruments and high-voltage industrial control panels without voltage translation.
Lamp test and blanking controls	Supports factory calibration, field diagnostics, and dynamic display management in multi-digit systems.
TTL-compatible inputs	Interoperates with legacy 74-series logic and microcontroller GPIO without interface circuitry.

Applications

Industrial Panel Meters	Test Equipment Displays
Use Scenario: Front-panel numeric readout in analog multimeters and process monitors requiring stable, low-component-count digit rendering. IC Role / Device Role / Timing Role: Latches BCD data from ADC interface, decodes to segment signals, and drives LED segments directly. Use Value: Reduces bill-of-materials by integrating latch, decode, and drive functions - lowering assembly cost and improving long-term reliability.	Use Scenario: Multi-digit display in benchtop oscilloscopes and signal generators where digits update infrequently but must remain visible during measurement pauses. IC Role / Device Role / Timing Role: Holds digit value via internal latch while system performs other tasks; blanking enables seamless digit switching. Use Value: Eliminates need for continuous CPU polling or external memory to retain displayed values between updates.
Legacy Instrumentation	Appliance Control Panels
Use Scenario: Replacement display driver in discontinued medical or laboratory equipment where original parts are obsolete. IC Role / Device Role / Timing Role: Drop-in functional replacement for CD4056B-series devices in existing 16-pin SOIC footprints. Use Value: Maintains identical timing, pinout, and electrical behavior - enabling repair without board redesign.	Use Scenario: Numeric status display in microwave ovens, washing machines, and HVAC controllers with limited MCU I/O resources. IC Role / Device Role / Timing Role: Offloads BCD-to-display translation from microcontroller, freeing GPIO and reducing firmware complexity. Use Value: Enables use of low-pin-count MCUs while supporting clear, high-visibility LED readouts.

Industrial Panel Meters

Test Equipment Displays

Use Scenario: Front-panel numeric readout in analog multimeters and process monitors requiring stable, low-component-count digit rendering.

IC Role / Device Role / Timing Role: Latches BCD data from ADC interface, decodes to segment signals, and drives LED segments directly.

Use Value: Reduces bill-of-materials by integrating latch, decode, and drive functions - lowering assembly cost and improving long-term reliability.

Use Scenario: Multi-digit display in benchtop oscilloscopes and signal generators where digits update infrequently but must remain visible during measurement pauses.

IC Role / Device Role / Timing Role: Holds digit value via internal latch while system performs other tasks; blanking enables seamless digit switching.

Use Value: Eliminates need for continuous CPU polling or external memory to retain displayed values between updates.

Legacy Instrumentation

Appliance Control Panels

Use Scenario: Replacement display driver in discontinued medical or laboratory equipment where original parts are obsolete.

IC Role / Device Role / Timing Role: Drop-in functional replacement for CD4056B-series devices in existing 16-pin SOIC footprints.

Use Value: Maintains identical timing, pinout, and electrical behavior - enabling repair without board redesign.

Use Scenario: Numeric status display in microwave ovens, washing machines, and HVAC controllers with limited MCU I/O resources.

IC Role / Device Role / Timing Role: Offloads BCD-to-display translation from microcontroller, freeing GPIO and reducing firmware complexity.

Use Value: Enables use of low-pin-count MCUs while supporting clear, high-visibility LED readouts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar BCD-to-7-segment display driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4511BE	Drives common-anode LEDs; requires external pull-up resistors; no internal latch (requires external clock or latch).	Used where display anodes connect to V_DD; incompatible with common-cathode layouts without hardware changes.	Select CD4511BE only if display polarity and absence of latch align with system architecture.
MC14495P	CMOS BCD-to-7-segment decoder with open-collector outputs; no latch; rated for −55°C to +125°C operation.	Requires external transistors or drivers for LED current; suited for extended temperature environments beyond CD4056BMG4's range.	Choose MC14495P when operating outside −40°C to +85°C or when open-collector flexibility is required.

Compared with CD4056BMG4, CD4511BE demands common-anode displays and external latching, while MC14495P lacks integrated drive strength and latch functionality - making CD4056BMG4 uniquely suited for self-contained, common-cathode, latch-enabled LED digit systems.

Availability

CD4056BMG4 is available at Aetrix Electronics and suitable for industrial panel meters, test equipment displays, and legacy instrumentation requiring stable component supply and long-lifecycle support.

Supply support for CD4056BMG4 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 broad industrial and automotive qualification.

The CD4056BMG4 belongs to TI's legacy CMOS logic family, designed specifically for reliable, low-power, direct-drive LED display interfacing in cost-sensitive and long-lifecycle instrumentation applications.

FAQ

What is the function of the LE pin on the CD4056BMG4?

The LE (Latch Enable) pin on the CD4056BMG4 is a positive-edge-triggered input that captures the current 4-bit BCD data (A–D) into the internal latch. Once latched, the decoded segment outputs remain stable regardless of subsequent input changes - enabling synchronization with external timing or multiplexed data buses. This behavior is essential for maintaining consistent display output during system data transfers.

Can the CD4056BMG4 drive common-anode LED displays?

No, the CD4056BMG4 is designed exclusively for common-cathode LED displays. Its segment outputs are active-low, sinking current from the LED anodes (connected to V_DD) to ground. Driving a common-anode display would require sourcing current - a function not supported by the CD4056BMG4's output structure. For common-anode applications, consider the CD4511BE instead.

What is the maximum sink current per segment output of the CD4056BMG4?

The CD4056BMG4 guarantees a minimum sink current of 10 mA per segment output (pins a–g) at V_DD = 5 V and V_OL ≤ 0.5 V. At higher supply voltages (e.g., 15 V), output saturation voltage increases slightly, limiting usable current - design should verify actual V_OL under load to ensure LED brightness meets requirements. Derating is recommended above 10 mA.

Does the CD4056BMG4 require external current-limiting resistors for LED segments?

External current-limiting resistors are recommended for most applications. While the CD4056BMG4 can sink up to 10 mA per segment, its output impedance and V_OL vary with supply voltage and temperature. Resistors ensure stable LED current and prevent thermal runaway - especially critical when driving multiple segments simultaneously or operating near maximum ratings.

How does the BL̅ (Blanking) input interact with the LT̅ (Lamp Test) input on the CD4056BMG4?

On the CD4056BMG4, BL̅ (active-low blanking) takes precedence over LT̅ (active-low lamp test). When BL̅ is LOW, all segment outputs are forced LOW regardless of LT̅ state. Only when BL̅ is HIGH does LT̅ become functional - pulling LT̅ LOW then activates all segments simultaneously. This priority ensures display disablement remains deterministic during system reset or fault conditions.

CD4056BMG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

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

CD4056BMG4 FAQ

1.How can I place an order for CD4056BMG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CD4056BMG4 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 CD4056BMG4 reliable?

The price and inventory of CD4056BMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4056BMG4 is usually 5 days.

3.What payment methods are accepted for CD4056BMG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4056BMG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD4056BMG4?

CD4056BMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD4056BMG4 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 CD4056BMG4?

For technical support, including CD4056BMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4056BMG4 requirements.

6.How does Aetrix verify that CD4056BMG4 is sourced from the original manufacturer or authorized distributors?

All CD4056BMG4 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 CD4056BMG4 meets industry standards.

7.What is the process for return or replacement of CD4056BMG4?

All CD4056BMG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4056BMG4, 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 CD4056BMG4 part is unused and in its original packaging.

Return procedure for CD4056BMG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…