CD4503BM - Hex Non-Inverting 3-18V Buffer | Texas Instruments
料号： CD4503BM ✓ 量产中CD4503BM 概述
A CMOS hex buffer is a logic-family device that reproduces each input signal at its corresponding output while providing buffering and stronger output-drive capability. Within the logic hierarchy, a buffer is a logic IC, and its tri-state outputs allow a shared bus to place each channel in a high-impedance state when it is not selected. This makes the CD4503BM suitable for bus-interface and data-routing circuits that require non-inverting logic, grouped output disabling, and push-pull operation.
The CD4503BM supports the manufacturer’s 5 V, 10 V, and 15 V parametric ratings and includes one TTL-load output-drive capability. Its maximum input current is specified as 1 µA at 18 V over the full package-temperature range and 100 nA at 18 V at 25°C. These characteristics are important when the buffer is powered from a 3 V to 18 V rail or interfaces with CMOS logic that requires minimal input loading.
The architecture uses six non-inverting channels and two separate output-disable controls rather than one common enable. This grouped control arrangement allows four outputs to be disabled together while the other two are managed independently. The three-state outputs support high sink and source current, making the device useful where a buffer must support bus loading rather than only provide logic isolation.
Typical applications include three-state data buses, control-signal distribution, multi-source digital routing, and systems requiring non-inverting buffer stages. The 16-SOIC package supports compact surface-mount layouts, while the broad 3 V to 18 V supply range accommodates industrial and embedded logic systems. Exact timing, temperature-range, and absolute-maximum details should be confirmed in the manufacturer datasheet before design release.
Designers should verify the disable-control polarity and required output state during disable from the CD4503B TYPES datasheet (Rev. C). PCB layouts should preserve short logic traces, adequate supply decoupling, and unobstructed thermal paths. Because the supplied distributor data does not include complete timing curves or per-pin electrical limits, those values should not be inferred from the family description.
This page consolidates verified manufacturer information, distributor availability, current pricing, pin-compatible industry references, and practical selection guidance. It also distinguishes verified facts from parameters that still require confirmation, helping engineers evaluate CD4503BM without relying on an incomplete cross-reference listing.
直接替换替代料： CD4503BM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC14503
✅ 直接替换📋 参考替代料（不在目录中）
MM80C97
✅ 直接替换📋 参考替代料（不在目录中）
340097
✅ 直接替换📋 参考替代料（不在目录中）
CD4503BM 最大额定值与电气特性
| Product Type | Hex non-inverting tri-state CMOS buffer |
| Number of Channels | 6 channels |
| Supply Voltage Range | 3 V to 18 V |
| Parametric Voltage Ratings | 5 V, 10 V, and 15 V |
| Logic Direction | Non-inverting |
| 输出配置 | Push-pull with three-state output |
| Output-Disable Controls | 2 independent controls |
| Disable Group 1 | Controls 4 buffers |
| Disable Group 2 | Controls 2 buffers |
| TTL-Load Output Drive | 1 TTL-load output-drive capability |
| Maximum Input Current | 1 µA at 18 V over full package-temperature range |
| Maximum Input Current at 25°C | 100 nA at 18 V |
| 封装 | 16-SOIC |
| 安装类型 | Surface mount |
| 引脚数量 | 16 pins |
| Industry Pin Compatibility | MM80C97, MC14503, and 340097 |
| JEDEC Qualification | JEDEC Tentative Standard No. 13B, B-series specifications |
CD4503BM 16-soic 引脚配置指南
CD4503BM（16-soic 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： CD4503BM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CD4503BM 适用于 6 应用s: Shared Three-State Data Bus, Multi-Source Digital Signal Routing, Control-Signal Distribution, CMOS-to-Logic Level Interface, Legacy Industrial Control System, Peripheral Data Isolation.
Shared Three-State Data Bus
The CD4503BM fits shared-bus interfaces because it provides six non-inverting channels with tri-state push-pull outputs and two separate output-disable controls. According to the Texas Instruments CD4503B TYPES datasheet (Rev. C), one control manages four buffers and the other manages the remaining two, allowing bus groups to be isolated independently. The 3 V to 18 V operating range also permits use across multiple legacy CMOS supply levels. When implementing the bus, confirm disable polarity and output timing from the datasheet, and ensure that only one enabled output drives a shared node at a time. The design should also account for capacitive loading and switching transients because the verified data confirms tri-state operation but does not provide complete timing or load-current curves.
推荐
Multi-Source Digital Signal Routing
The CD4503BM can support digital routing in which two or more signal sources must connect to one destination without continuous contention. Its six non-inverting channels provide independent buffered paths, while the two output-disable controls permit four outputs and two outputs to be parked in different groups. The push-pull three-state architecture is appropriate when a destination requires a defined driven level during enable and high impedance during disable. Because the supplied manufacturer information does not provide complete propagation-delay or output-disable timing values, the circuit should be timed from the official CD4503B TYPES datasheet (Rev. C). PCB traces should be short, and system sequencing should guarantee that disabled outputs enter high impedance before another source is enabled.
推荐
Control-Signal Distribution
The CD4503BM is suitable for distributing control signals where the destination circuitry requires more drive capability than the original CMOS source can provide. Six non-inverting channels preserve logic polarity, and the two grouped disable controls allow two banks of control outputs to be managed independently. Texas Instruments specifies 5 V, 10 V, and 15 V parametric ratings, a 3 V to 18 V operating supply range, and one TTL-load output-drive capability. These details make the device relevant to legacy CMOS and mixed logic systems. Design verification should compare the available output-drive data with the worst-case sink and source requirements. The maximum input current specification of 1 µA at 18 V over the full package-temperature range also helps assess loading when multiple source paths are connected.
推荐
CMOS-to-Logic Level Interface
The CD4503BM can serve as a non-inverting interface stage between legacy CMOS signals and logic requiring stronger output drive. Its six buffered channels provide push-pull outputs, while tri-state capability allows unused interface channels to be disconnected from a shared line. The verified 3 V to 18 V supply range, 5 V, 10 V, and 15 V parametric ratings, and TTL-load drive capability provide the core selection criteria. However, input and output logic thresholds, transition times, and per-pin current limits are not included in the supplied data and must be checked in the CD4503B TYPES datasheet (Rev. C). The interface design should preserve the original signal polarity and verify that the downstream device recognizes the buffered output levels under the worst-case supply and loading conditions.
推荐
Legacy Industrial Control System
The CD4503BM is applicable in legacy industrial control systems that use CMOS logic rails between 3 V and 18 V and require buffered non-inverting outputs. Six channels and two grouped disable controls make the device useful where control, address, or peripheral-select signals need stronger drive or controlled isolation. Texas Instruments publishes 5 V, 10 V, and 15 V parametric ratings and specifies one TTL-load output-drive capability, giving designers an initial basis for compatibility checks. Industrial qualification requirements, operating temperature limits, and ESD ratings are not present in the verified snippets, so they require separate confirmation. A robust implementation should use a stable supply rail, account for output timing during disable, and use the two control groups to avoid simultaneous drive conflicts on shared buses.
推荐
Peripheral Data Isolation
The CD4503BM can isolate selected peripheral data paths by placing unused outputs in a high-impedance state while other channels remain active. The six non-inverting channels and two independently managed disable groups permit four paths to be disabled together and two paths to be controlled separately, supporting partitioned peripheral buses or staged interfaces. The 3 V to 18 V supply range covers several common CMOS operating voltages, while the specified input current reaches no more than 1 µA at 18 V over the full package-temperature range and 100 nA at 18 V at 25°C. Designers should verify output leakage, bus timing, and disable-state behavior in the official datasheet because those values were not supplied here. PCB placement should minimize crosstalk between adjacent high-speed channels and keep the shared-bus node away from sensitive analog or clock signals.
推荐
推荐产品汇总
工程参考数据： CD4503BM ——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 | MC14503 | MM80C97 | 340097 |
|---|---|---|---|---|
| Brand | Texas Instruments | onsemi | onsemi | Texas Instruments |
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Product Type | Hex non-inverting tri-state CMOS buffer | Hex tri-state buffer industry type | Hex tri-state buffer industry type | Hex tri-state buffer industry type |
关键差异点
- Explicit grouped output-disable architecture （对比 MC14503)
- Verified operating and parametric voltage coverage （对比 MM80C97)
- Documented TTL-load output-drive capability （对比 340097)
- Low specified input loading （对比 MC14503)
设计说明
Confirm the output-disable truth table and polarity before connecting the two control inputs. The CD4503B TYPES datasheet (Rev. C) specifies that one control disables four buffers and the other disables two, but the supplied snippets do not reproduce the active or inactive logic level. A reversal could place a shared bus into contention or leave it permanently enabled. Build the enable sequencing into the controlling logic and verify it at power-up, reset, and fault states.
Keep the six buffered channels and their associated output-disable controls close to the signals they serve, especially when outputs can enter a high-impedance state. Route shared-bus traces away from clocks, resets, and sensitive analog inputs to reduce coupling. The verified information confirms tri-state push-pull outputs but does not provide complete rise-time, fall-time, or capacitive-load curves, so fan-out and trace-length limits must be taken from the manufacturer datasheet and validated in the final layout.
Design the 16-SOIC circuit around the verified 3 V to 18 V operating range and the published 5 V, 10 V, and 15 V parametric ratings. Do not infer input thresholds, output-current limits, or power dissipation from the operating-voltage range alone. Confirm the complete electrical-characteristic table and absolute-maximum ratings in the CD4503B TYPES datasheet (Rev. C). If the part operates near a rail transition, verify downstream input thresholds and the output state during power-down separately.
合规信息
The verified Texas Instruments product information states that the CD4503B meets requirements of JEDEC Tentative Standard No. 13B for B-series device descriptions. RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive-qualification declarations were not included in the supplied data and are therefore recorded as unknown or not applicable.
