CD4056BF - CMOS BCD to 7-Segment LCD Decoder | Texas Instruments
MPN： CD4056BF ✗ 停產CD4056BF 概覽
A BCD-to-7-segment LCD decoder/driver converts a four-bit binary-coded decimal input into the seven segment drive lines required by a numeric display. The CD4056B family is associated with liquid-crystal display drivers, allowing a digital controller to present decimal digits without driving each display segment directly. The verified material specifically describes the CD4056B as a CMOS BCD to 7-segment LCD decoder/driver with strobed-latch functionality.
The CD4056BF designation includes a CDIP package option, and the Rochester Electronics listing identifies a 16-CDIP package with a 0.300-inch, 7.62 mm lead pitch. The verified results also show distributor availability references, including an Octopart page for Texas Instruments and an FPGACenter listing for Rochester Electronics. Exact operating voltage, display output drive capability, propagation delay, quiescent current, and temperature ratings remain unavailable in the supplied excerpts and are intentionally not inferred here.
Typical design use includes digital meters, counters, timers, calculators, and embedded instruments where a controller presents one decimal digit through an LCD. The strobed latch can support decoded display data being held while the system updates the input, although the exact latch and display timing should be confirmed from the manufacturer datasheet. Because the LCD bias, segment polarity, and output drive requirements depend on the display selected, the LCD specification must be reviewed before final PCB and component selection.
Designers should confirm the package outline, pin numbering, supply voltage, input logic levels, segment outputs, common and backplane connections, and display bias arrangement against the original manufacturer documentation. The CD4056BF is a through-hole display-driver device in the listed CDIP option; it is not interchangeable with a surface-mount LCD driver without a footprint and pinout review.
This page consolidates the verified CD4056BF datasheet links, distributor package information, procurement references, and design cautions. It deliberately distinguishes documented facts from unavailable parameters and does not substitute generic CD4000-series values for CD4056BF-specific ratings.
直接替換替代品，適用於 CD4056BF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
CD4056BF
✅ 直接替換聯絡詢價
查看資料表 →CD4056BE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CD4056BF3A
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CD4056B
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CD4056BE.A
✅ 直接替換📋 參考替代品（不在目錄中）
CD4056BF 最大額定值與電氣特性
| Product Type | CMOS BCD to 7-segment LCD decoder/driver |
| Logic Family | CD4000 CMOS series |
| Input Code | BCD input |
| 輸出類型 | 7-segment LCD display outputs |
| Latch Function | Strobed latch |
| 封裝 | 16-CDIP |
| Package Lead Pitch | 7.62 mm (0.300 inch) |
| 安裝類型 | Through-hole |
| Manufacturer | Texas Instruments / Harris Semiconductor family |
| Verified Datasheet Reference | SCHS048C |
| Datasheet Revision | Revised October 2003 |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
CD4056BF 7.62 mm (0.300 inch) 腳位配置指南
CD4056BF（7.62 mm (0.300 inch) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： CD4056BF.
請參閱 資料表 以查看完整腳位配置。
典型應用
CD4056BF 適用於 6 應用s: Digital Multimeter Display, Frequency Counter Readout, Timer and Stopwatch Readout, Calculator and Counting Panel, Industrial Process Readout, Educational Electronics Readout.
Digital Multimeter Display
The CD4056BF fits a digital meter display that accepts BCD digits from a measurement controller and drives a numeric LCD. The decoder/driver architecture removes the need for the controller to map every segment directly, while the strobed latch can hold the decoded character during an update cycle. The verified 16-CDIP package is suitable for through-hole instrument construction where a stable mechanical connection is useful. Before finalizing the meter, verify the LCD’s bias voltage, common-electrode arrangement, segment polarity, and the IC’s supply and timing limits in the manufacturer datasheet.
推薦
Frequency Counter Readout
A frequency counter can use the CD4056BF as the final BCD-to-seven-segment decoding stage for each displayed digit. The upstream counter supplies a four-bit BCD value, and the LCD driver presents the decoded digit while the measurement engine updates its input. The verified strobed-latch feature is relevant when the display must remain stable between measurement updates. Confirm whether the chosen LCD requires alternating drive or a specific common/backplane waveform; the supplied excerpts do not provide those electrical details.
推薦
Timer and Stopwatch Readout
The CD4056BF can provide digit decoding for a timer, stopwatch, or laboratory timing instrument that displays count values in BCD. Its CMOS LCD-driver role is useful when the design wants a dedicated display interface rather than direct segment control from a microcontroller. The 16-CDIP package supports conventional through-hole assembly and prototyping. A timer design should verify the latch timing and display refresh behavior against the datasheet, especially if digits change rapidly or multiple displays share common control lines.
推薦
Calculator and Counting Panel
The CD4056BF is appropriate for a simple calculator, event counter, or keypad-driven counting panel where one or more digits must be decoded from BCD into LCD segments. Keeping the display conversion in a dedicated CMOS IC can reduce the direct display burden on the main controller and simplify firmware organization. The verified data does not provide segment-drive current or supply limits, so the LCD datasheet and SCHS048C must be reviewed before selecting component values or deciding whether an external driver is necessary.
推薦
Industrial Process Readout
An industrial process readout can use the CD4056BF to convert a controller’s BCD measurement value into a local LCD display. The part’s dedicated decoder/driver function helps isolate display formatting from the sensing or control logic, and the through-hole CDIP package is convenient for ruggedized panel boards assembled by conventional through-hole methods. The exact LCD bias and electrical limits remain unverified in the supplied search results, so the display module and driver must be tested together over voltage, temperature, and timing conditions.
推薦
Educational Electronics Readout
The CD4056BF can serve as a teaching example of BCD decoding, seven-segment indication, and latched display control in an electronics education board. Students can observe how a four-bit decimal code maps to LCD segments while the strobed latch demonstrates the value of separating data from display update timing. The 16-CDIP package is convenient for breadboard or through-hole construction. Before using it with a particular LCD, verify the common pins, segment polarity, bias voltage, and required drive waveform.
推薦
推薦產品摘要
工程參考資料，適用於 CD4056BF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CD4056BE | CD4056BF3A | CD4056B | CD4056BE.A |
|---|---|---|---|---|---|
| Package | 16-CDIP | 16-CDIP class; exact outline not verified | 16-CDIP-related listing; exact outline not verified | Package suffix and outline not verified | Package suffix and outline not verified |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Function | BCD to 7-segment LCD decoder/driver | CD4056B-family LCD decoder/driver; detailed data unavailable | CD4056B-family LCD decoder/driver; detailed data unavailable | LCD decoder/driver; detailed data unavailable | CD4056BE.A listing; detailed data unavailable |
主要差異化特點
- Dedicated BCD to seven-segment LCD decoding (對比Generic CD4056B family documentation)
- Strobed latch included in the documented function (對比CD4056BE.A listing)
- Through-hole CDIP availability (對比Surface-mount LCD-driver options)
設計說明
Do not connect the CD4056BF from a generic CD4056 diagram until the package suffix, pin numbering, and display pinout are checked. The verified material confirms a CD4056B-family LCD decoder/driver and a 16-CDIP option, but it does not reproduce the complete pin map. Compare every supply, BCD input, latch, segment, common, and backplane connection with SCHS048C and the selected LCD datasheet before fabrication.
Verify the IC supply voltage and LCD bias arrangement from the manufacturer datasheet before powering the board. The supplied excerpts do not provide the CD4056BF operating range or segment-output current, so a generic CD4000 voltage cannot be substituted. Confirm whether the LCD requires a separate bias supply and whether the decoder/driver can source or sink the required segment current. Add local decoupling according to the datasheet’s decoupling guidance.
Place the IC and display-decoupling connections according to the verified through-hole CDIP footprint and keep BCD and latch traces away from noisy analog or switching sections where possible. Because the exact pin map and timing values are not present in the supplied excerpts, use a mechanical footprint derived from the manufacturer drawing rather than estimating lead spacing. Inspect polarity and orientation marks before soldering to avoid damaging the display driver.
The strobed-latch timing should be treated as a design constraint rather than an afterthought. Establish when BCD inputs are allowed to change relative to the latch strobe, and account for propagation delay and display settling before sampling or changing digits. The verified excerpts identify the strobed-latch function but do not provide timing values, so use SCHS048C and the system clock requirements for the final timing budget.
合規資訊
The supplied verified excerpts do not provide compliance declarations for CD4056BF. RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status remain unknown.
