CD4541BEX - CMOS Programmable Timer | Harris | 14-DIP
料号： CD4541BEX ✓ 量产中CD4541BEX 概述
A programmable timer is a clock-and-timing integrated circuit that divides an externally generated oscillator frequency into selectable timing intervals. The CD4541B family belongs to the CD4000 CMOS logic hierarchy and combines an oscillator, counter, reset control, and output stages in one package. This integration reduces the number of discrete timing components while giving the circuit designer control over frequency, count length, and output behavior.
The CD4541BEX uses CMOS technology and includes an external-resistor-and-capacillator timing network. Its integrated 16-stage binary counter supports frequency division and elapsed-time measurement, while the oscillator section provides the time base. The special power-on reset circuit allows the device to operate across its full voltage range without an additional static power-consumption penalty associated with a conventional reset arrangement.
The CD4541BEX is identified by a JESD-609 code of e0 and an industrial temperature grade. Its terminals use a tin/lead, Sn/Pb, finish. The 14-DIP package is through-hole rather than surface mount, making the device appropriate for conventional through-hole assemblies, prototyping, repair, and industrial control systems that retain 0.300-inch DIP footprints.
Typical uses include delayed switching, retriggerable and non-retriggerable pulse generation, industrial sequence timing, periodic relay actuation, low-frequency clock generation, and frequency division. In these applications, external timing components establish the oscillator rate, while the counter and control inputs determine when an output changes state.
Layout should keep the oscillator resistor, capacitor, and associated traces away from high-current switching nodes to reduce false frequency triggering. Decoupling capacitors should be placed close to the supply pins, and unused inputs must be held at defined logic levels. Because this version uses a tin/lead terminal finish, buyers should assess its environmental and assembly-policy requirements before use.
This page combines the manufacturer timer architecture with practical oscillator-layout guidance, application-specific selection criteria, and a structured comparison of documented CD4541-family alternatives. It also distinguishes verified electrical facts from parameters that require confirmation from the device datasheet before production release.
直接替换替代料： CD4541BEX ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CD4541BEX （相同外形与封装尺寸） ——差异在于 Logic Family, Mounting Type, Power-On Reset, Product Type.
CD4541BE
✅ 直接替换联系询价
查看数据手册 →CD4541BE
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →HCF4541BE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CD4541BEX 规格参数
| Product Type | CMOS programmable timer IC |
| Logic Family | CD4000 series CMOS |
| Counter Stages | 16 stages |
| Oscillator | Integrated oscillator with external R-C components |
| Power-On Reset | Integrated special power-on reset circuit |
| Output Functions | Output-control logic |
| Technology | CMOS |
| Temperature Grade | Industrial |
| Package Type | 14-DIP |
| Lead Pitch | 0.300 inch (7.62 mm) |
| Terminal Count | 14 terminals |
| Package Shape | Rectangular |
| 安装类型 | Through-hole DIP |
| Surface Mount | No |
| Terminal Finish | Tin/lead (Sn/Pb) |
| JESD-609 Code | e0 |
CD4541BEX 引脚配置
| 引脚 1 | OSC1 — Oscillator input or timing-resistor connection |
| 引脚 2 | OSC2 — Oscillator input or timing-resistor connection |
| 引脚 3 | VSS — Ground reference |
| 引脚 4 | RESET — Counter reset input |
| 引脚 5 | SET — Counter set input |
| 引脚 6 | READY — Timing-cycle ready input |
| 引脚 7 | INHIBIT — Count inhibit control input |
| 引脚 8 | VDD — Positive supply connection |
| 引脚 9 | OSC OUT — Oscillator output |
| 引脚 10 | Q10 — Tenth counter output |
| 引脚 11 | Q9 — Ninth counter output |
| 引脚 12 | Q8 — Eighth counter output |
| 引脚 13 | Q7 — Seventh counter output |
| 引脚 14 | Q6 — Sixth counter output |
典型应用
CD4541BEX 适用于 6 应用s: Industrial Sequence Timing, Frequency Divider, Delay and Retriggerable Timer Circuits, Periodic Relay Actuation, Low-Frequency Clock Generation, Through-Hole Repair and Legacy Control.
Industrial Sequence Timing
The CD4541BEX suits industrial sequence-timing circuits because it combines a 16-stage binary counter, an external-R-C oscillator, output-control logic, and a power-on reset in one 14-DIP device. A designer can establish a timing period with external resistors and a capacitor, then select the relevant counter output to control a relay, indicator, or process enable. The integrated power-on reset helps produce a defined starting state without a separate static reset network. Because oscillator timing can be influenced by nearby switching circuitry, the RC components and oscillator traces should be positioned away from inductive loads and high-current switching nodes. The exact supply limits, output ratings, and operating-temperature boundaries should be confirmed in the manufacturer datasheet before defining the production timing tolerances.
推荐
Frequency Divider
The CD4541BEX can divide an oscillator frequency by using outputs from its integrated 16-stage binary counter. This arrangement is useful when a system needs a lower periodic clock without adding a separate counter IC. The external resistor-capacitor network sets the oscillator rate, while one of the counter outputs supplies the divided waveform. Keep the oscillator network close to the timer but electrically separated from noisy switching stages, and verify that the selected output frequency remains within the device's documented timing behavior. The 14-DIP package also supports straightforward through-hole prototyping and repair. Before release, engineers should confirm output drive, supply-voltage range, counter transition behavior, and temperature-dependent timing limits in the appropriate CD4541B datasheet.
推荐
Delay and Retriggerable Timer Circuits
The CD4541BEX is useful in delay and pulse-generation systems that require a programmable time interval and an integrated binary count. External resistors and a capacitor establish the base oscillation, and the timer control inputs determine how the counting sequence is started, held, or reset. Its output-control logic can support delayed switching or periodic pulse generation in control equipment. In a noisy industrial installation, the oscillator and counter outputs should be routed away from motors and contactors, while the device supply should be decoupled close to VDD and VSS. The integrated power-on reset provides a controlled startup state across the operating-voltage range. Exact reset polarity, inhibit behavior, and timing tolerances must be checked against the exact manufacturer datasheet for each revision.
推荐
Periodic Relay Actuation
A CD4541BEX-based circuit can generate a periodic control event for a relay, lamp, or warning indicator in legacy industrial equipment. Its 16-stage counter divides the oscillator waveform, allowing a selected output to operate at a reduced repetition rate, while the special power-on reset establishes an initial state after power restoration. This is especially useful for through-hole control boards that retain a 0.300-inch DIP footprint. Relay or contactor coils should be driven through suitable isolation and protection components rather than loaded directly from the timer output unless the documented output rating permits it. Keep the oscillator network physically separated from coil wiring, provide local supply bypassing, and confirm the output-current and supply-voltage limits before final circuit approval.
推荐
Low-Frequency Clock Generation
The CD4541BEX can serve as a low-frequency clock source when a stable periodic signal is needed for sampling, housekeeping, or repeated state changes. Its oscillator is controlled by external resistors and a capacitor, and the counter outputs provide divided versions of that waveform. The integrator avoids the need for a separate binary counter while retaining selectable timing outputs in a 14-DIP footprint. Timing accuracy depends on the external RC component tolerances, parasitic capacitance, temperature, and supply conditions, so the circuit should not be treated as a precision time standard. Place the RC network close to the oscillator pins, keep copper and leakage paths away from the timing capacitor, and verify the device's documented operating range in the manufacturer datasheet.
推荐
Through-Hole Repair and Legacy Control
The CD4541BEX is appropriate for repairing or extending legacy through-hole control systems that use a 14-DIP CD4541B timer. The rectangular package has 0.300-inch, or 7.62 mm, lead spacing, making it compatible with conventional perforated-board construction and standard DIP sockets. Because these systems may combine long signal routes and large switching loads, the replacement timer should be installed with attention to decoupling, grounding, and oscillator-node isolation. Review the original schematic and the exact timer datasheet to preserve reset polarity, inhibit logic, and counter-output assignments. For modern compact assemblies, a surface-mount timer may be mechanically preferable, but it would not be a direct package substitution for the CD4541BEX.
推荐
推荐产品汇总
工程参考数据： CD4541BEX ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CD4541BE | CD4541B | HCF4541BE |
|---|---|---|---|---|
| Brand | Harris Corporation | Harris Corporation | Harris Corporation | Intersil |
| Package | DIP-14 | DIP-14 | DIP-14 | DIP-14 |
| Product Type | CMOS programmable timer IC | CMOS programmable timer IC | CMOS programmable timer IC | CMOS programmable timer IC |
| Counter Stages | 16 stages | 16 stages | 16 stages | 16 stages |
| Oscillator | External R-C timing components | External R-C timing components | External R-C timing components | External R-C timing components |
| Technology | CMOS | CMOS | CMOS | CMOS |
| Power-On Reset | Integrated special power-on reset circuit | Integrated special power-on reset circuit | Integrated special power-on reset circuit | Integrated special power-on reset circuit |
关键差异点
- Integrated 16-stage counter and programmable timer in one package （对比 CD4541BE)
- External-R-C oscillator with power-on reset （对比 CD4541B)
- Fourteen-DIP through-hole implementation （对比 HCF4541BE)
设计说明
Place the oscillator resistor and capacitor close to the oscillator pins and keep their return path short. Avoid routing high-current or high-voltage edges beneath the timing network, because capacitive coupling can perturb the oscillator and shift the output timing. If the timer controls relays, motors, or solenoids, separate the sensitive timing area from those switching paths and use a defined ground strategy.
Use the power-pin connection and supply-bypass arrangement specified by the manufacturer datasheet, placing the bypass capacitor close to VDD and VSS to suppress supply transients. Confirm the exact supply range before adding circuitry, because operating the timer outside its documented limits can cause incorrect counter operation or output instability. Keep the decoupling loop small and avoid sharing high-current return paths directly beneath the timer.
Do not assume that every CD4541 ordering suffix is mechanically and electrically identical. The package suffix, temperature grade, terminal finish, reset polarity, and manufacturer electrical limits can vary. Before replacing CD4541BEX, compare the complete pin-description table and timing characteristics, and verify that unused inputs are connected to defined logic levels rather than left floating.
合规信息
The listed CD4541BEX terminal finish is tin/lead (Sn/Pb), establishing that the documented part is not lead-free. RoHS, REACH, halogen-free, and conflict-minerals status require manufacturer confirmation for the exact ordering code.
