CD4502BM - 6-Channel 3-18V CMOS Inverter | Texas Instruments
N.º de pieza: CD4502BM ✓ ActivoCD4502BM Descripción general
A CMOS hex inverter/buffer is a logic-family device that combines inversion with controlled output impedance. The CD4502B belongs to the broader hierarchy of CMOS logic, logic buffer or driver, interface IC, and digital semiconductor. Its high-impedance output state allows multiple channels to share a common data bus without active drive contention, while its low-noise-margin operating limits define the voltage range in which attached CMOS circuitry is reliably interpreted.
Key features include six independently buffered inverter channels, three-state outputs, a common output-disable input, and a common inhibit input. A logic 1 on OUTPUT DISABLE places all six outputs in the high-impedance state. A logic 1 on INHIBIT drives all six outputs to logic 0 when OUTPUT DISABLE is low. According to the Texas Instruments product page, the device can drive two standard TTL loads, equivalent to six times the JEDEC B-series IOL standard.
The CD4502B follows the JEDEC B-series CMOS framework and operates across a 3 V to 18 V supply range. CMOS construction provides high input impedance and low static supply demand, while the buffered push-pull output configuration supports dependable drive into compatible logic loads. The three-state function is especially useful for bidirectional or shared-bus arrangements where multiple devices must be electrically isolated while disabled.
Typical uses include CMOS-to-TTL interfacing, data-bus isolation, instrument control, industrial automation, embedded control, and digital signal conditioning. The common disable and inhibit functions allow a system controller to place an entire six-channel group into a safe state or force the group to logic 0, reducing external control logic and simplifying fault handling.
The primary design consideration is logic-level compatibility. Supply voltage, input thresholds, fanout, and the enabled or disabled state of every driver must be checked before connecting outputs to a shared bus. Unconnected inputs should not be left floating, and supply bypassing should follow the manufacturer's recommended layout to limit transient noise during output state changes.
This product record combines verified manufacturer and distributor information, a pin-compatible alternative review, application guidance, and design-specific cautions. It is intended to help engineers identify the correct logic function, verify package compatibility, and implement the CD4502BM without relying only on a distributor parameter summary.
Alternativas directas para CD4502BM — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
CD4502BMSR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CD4502BNSR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
HEF4502BT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CD4502BM Valores máximos y características eléctricas
| Product Type | CMOS strobed hex inverter/buffer with 3-state outputs |
| Number of Channels | 6 channels |
| Number of Elements | 6 elements |
| Bits per Element | 1 bit per element |
| Logic Type | Inverting buffer |
| Tipo de salida | Push-pull, 3-state |
| Supply Voltage Range | 3 V to 18 V |
| Noise Margin at 5 V | 1 V |
| Noise Margin at 10 V | 2 V |
| Noise Margin at 15 V | 2.5 V |
| TTL Drive Capability | 2 standard TTL loads, equivalent to 6 times the JEDEC B-series IOL standard |
| Output Disable Control | Logic 1 disables all six outputs into the high-impedance state |
| Inhibit Control | Logic 1 forces all six outputs to logic 0 when output disable is low |
| Encapsulado | 16-pin SOIC |
| Tipo de montaje | Surface mount |
| Temperatura de funcionamiento | -55 °C to +125 °C |
| Technology Standard | JEDEC Tentative Standard No. 13B for B-series CMOS devices |
Guía de configuración de pines de CD4502BM 16-pin soic
Configuración de pines para CD4502BM (encapsulado 16-pin soic). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para CD4502BM.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
CD4502BM es adecuado para 6 aplicacións: CMOS-to-TTL Data-Bus Interface, Shared Bidirectional Data Bus, Industrial Control Signal Conditioning, Digital Instrumentation Control, Embedded Logic Fan-Out, Digital Signal Fault Containment.
CMOS-to-TTL Data-Bus Interface
The CD4502BM fits a CMOS-to-TTL interface because its six inverting channels can convert a group of CMOS signals while driving up to two standard TTL loads. According to the Texas Instruments product page, this equals six times the JEDEC B-series IOL standard. A 3 V to 18 V supply range supports both low-voltage CMOS systems and higher-voltage legacy logic. The common OUTPUT DISABLE input can place all six outputs in the high-impedance state when the interface must be disconnected. Designers should still verify the output levels at the selected supply voltage and the input thresholds of the attached TTL devices.
Recomendado
Shared Bidirectional Data Bus
The CD4502BM is appropriate for a shared data bus because a logic 1 on OUTPUT DISABLE releases all six outputs to the high-impedance state. This prevents active output contention when another bus driver becomes active. The six-channel organization also reduces the number of discrete interface circuits required in a parallel bus. Its push-pull outputs provide defined drive when enabled, while the common inhibit control can force the group to logic 0 for a controlled inactive state. System timing must ensure output-disable and enable intervals do not overlap when two devices share the same nodes.
Recomendado
Industrial Control Signal Conditioning
The CD4502BM can condition six control signals in industrial logic systems that require inversion and bus isolation. Its common OUTPUT DISABLE and INHIBIT inputs simplify group-level fault handling: disable isolates the channels, while inhibit forces all outputs to logic 0. The verified operating-temperature range of -55 °C to +125 °C supports applications across a wide environmental range, subject to the complete system's qualification requirements. Engineers should validate voltage levels at every connected controller and include suitable input tie-offs for unused channels according to the official data sheet.
Recomendado
Digital Instrumentation Control
The CD4502BM is useful in test and measurement equipment where multiple digital control lines must be inverted, buffered, or electrically isolated from a common bus. Its 3 V to 18 V operating range allows use with different supply domains within an instrument, subject to level compatibility at each interface. The OUTPUT DISABLE function supports measurement-system isolation between active and inactive circuit sections. Compared with six discrete inverters, the common controls reduce routing overhead and provide a coordinated way to disable or force the entire group.
Recomendado
Embedded Logic Fan-Out
The CD4502BM can provide six buffered, inverted outputs from six input signals in an embedded control system. CMOS input impedance makes the device suitable for interfacing higher-impedance control sources, while the push-pull outputs provide active drive for compatible logic loads. The 1 V noise margin at 5 V is particularly relevant when the surrounding system operates at 5 V. The three-state capability allows the outputs to be removed from a shared line during transitions. Layout should place supply bypassing close to the device and maintain short output paths to minimize switching transients.
Recomendado
Digital Signal Fault Containment
The CD4502BM can support fault containment by using INHIBIT to force all six outputs to logic 0 and OUTPUT DISABLE to place the outputs in a high-impedance state. These two controls provide distinct protective behaviors when an upstream controller detects an abnormal condition. The common architecture allows one safety-oriented control signal to manage an entire channel group. Designers should establish which state is safest for the connected load, verify that no other driver remains active on a shared bus, and ensure the control logic cannot switch OUTPUT DISABLE and INHIBIT into an unintended combination.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para CD4502BM — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CD4502BMSR | CD4502BNSR | HEF4502BT |
|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Product Type | CMOS strobed hex inverter/buffer with 3-state outputs | CMOS strobed hex inverter/buffer with 3-state outputs | CMOS strobed hex inverter/buffer with 3-state outputs | CMOS hex inverter/buffer with 3-state outputs |
| Number of Channels | 6 channels | 6 channels | 6 channels | 6 channels |
| Logic Function | Inverting | Inverting | Inverting | Inverting |
| Output State | Push-pull with 3-state output | Push-pull with 3-state output | Push-pull with 3-state output | 3-state output |
| Supply Voltage Range | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V |
| Output Disable | Logic 1 produces high impedance on all outputs | Logic 1 produces high impedance on all outputs | Logic 1 produces high impedance on all outputs | Logic 1 produces high impedance on all outputs |
Diferenciadores clave
- Collective six-channel bus isolation (frente a CD4502BMSR)
- Distinct disable and forced-zero states (frente a CD4502BNSR)
- Cross-brand source consolidation (frente a HEF4502BT)
Notas de diseño
Treat OUTPUT DISABLE and INHIBIT as separate controls. OUTPUT DISABLE releases all six outputs to the high-impedance state, while INHIBIT forces all outputs to logic 0 only when OUTPUT DISABLE is low. Before connecting multiple devices to one bus, define every legal control combination and ensure two drivers are never enabled on the same node at the same time.
The CD4502BM operates across 3 V to 18 V, but input thresholds and output levels vary with VDD. Confirm the logic-high and logic-low requirements of every attached device at the selected supply voltage. The verified noise margins are 1 V at 5 V, 2 V at 10 V, and 2.5 V at 15 V; do not assume those margins apply at every point in the supply range.
Place the device close to the signals it buffers and route output-disable and inhibit traces away from high-current switching nodes. Keep the supply and ground connections short, and follow the manufacturer's recommended decoupling arrangement in the official CD4502B data sheet. Good return paths and local bypassing reduce output transients that could affect neighboring CMOS circuitry.
Do not leave unused CMOS inputs floating. High input impedance does not make an open input harmless because leakage and internal transitions can create excessive current or unstable logic behavior. Apply the unused-input recommendations from the manufacturer data sheet, and use pull-up or pull-down arrangements that maintain a valid level whenever the associated control or data source is disconnected.
Información de cumplimiento
The verified excerpts identify JEDEC Tentative Standard No. 13B compliance but do not provide RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 declarations. AEC-Q100 is marked not applicable because CD4502BM is a general-purpose logic IC rather than an automotive-qualified device.
