CD4050BNSR - Hex Non-Inverting Buffer 3-18V SOP-16 | TI
Référence : CD4050BNSR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.56 | $0,56 |
| 10 | $0.5 | $5,00 |
| 100 | $0.42 | $42,00 |
| 500 | $0.36 | $180,00 |
| 1 000 | $0.3 | $300,00 |
| 2 500 | $0.27 | $675,00 |
CD4050BNSR Présentation
A CMOS buffer/converter is a digital logic building block whose primary job is to provide current drive gain and voltage-level translation between two logic domains without inverting the signal. Within the broader hierarchy of ICs, the CD4050B belongs to the CD4000 family of CMOS logic ICs, which sits under the Specialty Logic / Buffers & Line Drivers segment of the Logic IC category. Each buffer in this part functions as a stand-alone driver channel that sources and sinks current into the next stage, isolating the input logic domain from the load. The 'B' suffix denotes the buffered TI/CMOS output stage that improves noise margin over the older unbuffered CD4050A.
Key features include 6 independent channels, push-pull CMOS output drive, very low quiescent supply current (typically in the microamp range), input clamp diodes that protect the input from voltages up to 18V regardless of VCC, and a propagation delay of approximately 50 ns at 10V VCC (Standard speed). The 16-pin SOP (NS) package measures 0.209 inch (5.30 mm) body width, making it compatible with industry SOP-16 footprints and conventional lead-free reflow profiles.
The CD4050B uses a complementary MOS enhancement-mode P-channel and N-channel transistor output structure in every channel, which provides symmetrical rise/fall drive and low quiescent leakage. The single-supply VCC architecture means only one rail is required, while the input clamp diodes perform the level-shift work by clamping input voltages above VCC down to a diode drop above VCC. The push-pull output stage delivers rail-to-rail output swings while preventing shoot-through, unlike the older CD4049UB which provides inverting buffers with the same drive.
Typical applications include CMOS-to-DTL/TTL logic-level translation in mixed-voltage systems, signal buffering between high-impedance sensor outputs and downstream CMOS logic, input protection/level-shifting for buttons and switch contacts, and bus buffering where a non-inverting driver must preserve the original logic state. The wide 3V to 18V supply tolerance makes it compatible with 3.3V, 5V, 9V, 12V, and 15V logic rails.
When designing with this part, note that unused inputs must be tied to VCC or GND - they MUST NOT be left floating, because floating CMOS inputs draw quiescent current and can drift into the linear region. The input voltage, thanks to the clamp diode, may safely exceed VCC (up to 18V) for logic-down translation, which is the opposite of the more common step-up translation. The push-pull outputs can drive standard CMOS loads and modest TTL loads through an external pull-up resistor.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone TI datasheet, including an explicit pin-for-pin comparison versus competing CD4050B equivalents from onsemi, Toshiba, and ROHM in the same 16-SOIC footprint.
Alternatives de remplacement direct pour CD4050BNSR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
CD4050BNSRE4
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
CD4050BNSRG4
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC14050BDR2G
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TC4050BFN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
HEF4050BT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CD4050BMTR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CD4050BNSR Valeurs maximales et caractéristiques électriques
| Fonction | Hex Non-Inverting Buffer / Logic-Level Converter |
| Technology Family | CD4000 CMOS |
| Number of Channels | 6 (Hex) |
| Bits per Element | 1 |
| Type de sortie | Push-Pull CMOS |
| Input Type | Standard CMOS |
| Logic Type | Buffer, Non-Inverting |
| Supply Voltage (VCC) Min | 3 V |
| Supply Voltage (VCC) Max | 18 V |
| Plage de température de fonctionnement | -55 C to +125 C |
| Input Clamp Diodes | Yes (on every input) |
| Propagation Delay (tpd) | 50 ns typical at VCC = 10 V |
| Quiescent Supply Current (ICC) | uA range (CMOS) |
| Boîtier | 16-SOIC (SOP-16 / NS), 0.209" (5.30 mm) body width |
| Type de montage | Surface Mount |
| Lead-Free / RoHS | Yes |
| Rating | Catalog (commercial grade) |
| Special Features | Single-supply operation, level translation, 6 independent buffers |
Configuration des broches de CD4050BNSR
| Broche 1 | 1Y — Buffer 1 output (non-inverting) |
| Broche 2 | 3Y — Buffer 3 output (non-inverting, see datasheet pinout note) |
| Broche 3 | 1A — Buffer 1 input |
| Broche 4 | 3A — Buffer 3 input |
| Broche 5 | 5A — Buffer 5 input |
| Broche 6 | 2Y — Buffer 2 output (non-inverting) |
| Broche 7 | 4A — Buffer 4 input |
| Broche 8 | VSS — Ground (logic low reference) |
| Broche 9 | 4Y — Buffer 4 output (non-inverting) |
| Broche 10 | 2A — Buffer 2 input |
| Broche 11 | 6Y — Buffer 6 output (non-inverting) |
| Broche 12 | 5Y — Buffer 5 output (non-inverting) |
| Broche 13 | 6A — Buffer 6 input |
| Broche 14 | VDD — Positive supply voltage (3V to 18V) |
| Broche 15 | NC — Not connected (per datasheet) |
| Broche 16 | NC — Not connected (per datasheet) |
Applications typiques
CD4050BNSR convient pour 6 applications: CMOS-to-TTL Logic Level Translation (5V/3.3V), Signal Buffering for High-Impedance Sensor Outputs, Switch and Button Input Conditioning, Bus Driver and Line Buffer in Mixed-Voltage Systems, Industrial Control and Factory Automation, Hobby and Educational Electronics (3.3V / 5V Translation).
CMOS-to-TTL Logic Level Translation (5V/3.3V)
The CD4050BNSR is purpose-built for logic-level translation between a higher-voltage CMOS domain (e.g. 5V, 9V, 12V, or 15V) and a lower-voltage DTL/TTL or CMOS domain. The input clamp diodes clamp any input above VCC to within one diode drop of VCC, so a 5V signal can be applied to the input while VCC is set to 3.3V to drive downstream 3.3V logic safely. The non-inverting function preserves the original logic state, eliminating the need for additional inversion. Per the TI datasheet, this is the canonical application for the CD4050B family. The wide 3V to 18V supply range means the same part serves 3.3V, 5V, 9V, and 12V logic families without external level-shifter ICs.
Recommandé
Signal Buffering for High-Impedance Sensor Outputs
The CD4050BNSR provides current drive gain when buffering high-impedance CMOS sensor outputs (e.g. piezoelectric sensor buffers, photodiode amplifier outputs, or analog comparator outputs) into downstream logic. Each of the six channels sources and sinks drive CMOS output current, isolating the sensitive analog front-end from the digital load. With propagation delay of ~50 ns at 10V VCC, the buffer is fast enough for general-purpose signal conditioning at kHz-to-low-MHz rates. Designers often place the CD4050BNSR between the sensor amplifier output and the microcontroller GPIO to prevent back-driving and reduce digital noise injection into the analog path. The six independent channels allow buffering of up to six sensors on one IC.
Recommandé
Switch and Button Input Conditioning
Mechanical switches, pushbuttons, and rotary encoder contacts produce bouncing transients that must be debounced before reaching digital logic. The CD4050BNSR, combined with an external RC low-pass filter and Schmitt-trigger input device, provides input conditioning that protects the microcontroller GPIO from switch bounce and contact arcing. The input clamp diodes absorb inductive transients from relay coils and motor windings that share the same ground. The 3V-18V supply tolerance means the part works with 3.3V microcontroller rails or 5V logic rails. With six independent channels, a single CD4050BNSR can debounce up to six switch inputs, saving PCB area and BOM cost versus discrete buffers.
Recommandé
Bus Driver and Line Buffer in Mixed-Voltage Systems
In mixed-voltage digital systems where 3.3V MCUs interface to 5V peripherals, the CD4050BNSR serves as a one-way bus driver to step the MCU output down to the 5V peripheral input (using VCC = 5V on the buffer). Conversely, by setting VCC = 3.3V and feeding 5V inputs through the clamp diodes, signals from 5V peripherals can be stepped down to 3.3V MCU inputs. Each channel provides sufficient drive for moderate capacitive loads, allowing direct connection to short bus traces without external bus-driver ICs. The push-pull CMOS output stage delivers rail-to-rail output swings, ensuring clean logic levels at both extremes of the supply range.
Recommandé
Industrial Control and Factory Automation
The CD4050BNSR's wide 3V to 18V supply range and -55C to +125C operating temperature make it well-suited for industrial control and factory automation environments. Typical applications include PLC input conditioning, sensor interface buffering, and 24V-to-5V logic translation (where the input clamp diodes step 24V signals down to the local VCC). The robust CMOS input structure tolerates the electrical transients found on factory floor wiring. The 16-SOIC package supports surface-mount assembly for high-density industrial controller PCBs. A single hex buffer can handle multiple sensor channels, simplifying BOM and reducing per-channel cost.
Recommandé
Hobby and Educational Electronics (3.3V / 5V Translation)
The CD4050BNSR is one of the most commonly used logic-level translator ICs in hobby and educational electronics projects where 5V Arduino-style boards must interface with 3.3V modules (ESP32, Raspberry Pi, sensors). The hex non-inverting buffer format is easy to wire on a breadboard or perfboard. The single-supply VCC architecture means only one rail is needed on the buffer side, and the input clamp diodes handle the 5V-to-3.3V step-down safely without external resistors. The part's robust input structure and forgiving supply range make it ideal for student projects where wiring mistakes are common. The 16-SOIC is also available in through-hole PDIP (CD4050BE) for breadboard prototyping.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CD4050BNSR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC14050BDR2G | TC4050BFN | HEF4050BT | CD4050BMTR |
|---|---|---|---|---|---|
| Package | 16-SOIC (NS) | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Brand | Texas Instruments | onsemi | Toshiba | NXP Semiconductors | ROHM Semiconductor |
| Function | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer |
| Channels | 6 | 6 | 6 | 6 | 6 |
| Output Type | Push-Pull CMOS | Push-Pull CMOS | Push-Pull CMOS | Push-Pull CMOS | Push-Pull CMOS |
| Supply Voltage (VCC) | 3V to 18V | 3V to 18V | 3V to 18V | 3V to 18V | 3V to 18V |
| Operating Temperature | -55C to +125C | -55C to +125C | -40C to +85C | -40C to +125C | -40C to +85C |
| Lifecycle Status | Active | Active | Active | Active | Active |
Principaux différenciateurs
- TI-branded active lifecycle with broad distributor stock (vs MC14050BDR2G (onsemi))
- Six independent non-inverting buffers with input clamp diodes (vs CD4049UB (inverting))
- Single-supply operation simplifies level translation (vs Dedicated level shifter ICs (e.g. TXS0108E))
Notes de conception
Estimated: A single CD4050BNSR draws only a few microamps of quiescent current when all inputs are tied to VCC or GND and all outputs are unloaded. However, every CMOS input that is left floating can draw substantial supply current as the input stage enters its linear region. Therefore, all six inputs MUST be tied to either VCC or GND - never left floating - to maintain microamp-range ICC. Inputs can safely exceed VCC up to 18V thanks to the input clamp diodes, which clamp input voltage to one diode drop above VCC.
Do NOT use the CD4050BNSR output to drive TTL inputs above VCC; the output swing is limited to 0V-to-VCC. When translating 5V logic down to 3.3V logic, set VCC=3.3V and feed the 5V signals into the inputs; the clamp diodes will limit the input to ~3.3V + 0.7V = 4.0V max, which is safe for 3.3V CMOS inputs. When translating 3.3V logic up to 5V logic, set VCC=5V and feed the 3.3V signals into the inputs; the buffer outputs swing rail-to-rail (0V to 5V). The non-inverting function preserves the input logic state - use CD4049UB if inversion is required.
Place a 0.1uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14) of the 16-SOIC package, with a wide ground return to the VSS pin (pin 8). For noisy environments (industrial, automotive), add a bulk electrolytic or tantalum capacitor of 1uF to 10uF on VDD to handle supply transients. The 16-SOIC (NS) package has standard 1.27 mm pitch SOIC land pattern; follow IPC-7351 SOIC-16 land pattern recommendations. The exposed thermal pad is not used (no EP on this package), but standard copper pour on VDD and VSS is good practice.
The CD4050BNSR has a propagation delay of approximately 50 ns at VCC=10V, which makes it suitable for general-purpose logic up to a few MHz. For high-speed signals above ~10 MHz, the slow edge transitions can introduce timing skew, ringing, or impedance mismatch on controlled-impedance traces. Consider using a faster logic family (74LVC, 74AUC) for high-speed buses. The push-pull CMOS output stage has symmetrical rise/fall drive, but output current is modest (typically a few mA), so avoid driving long cables or heavy capacitive loads (>100 pF) without additional buffering.
Informations de conformité
RoHS compliant per TI product page; lead-free finish. CD4050BNSR is catalog-grade (not automotive qualified); AEC-Q100 not applicable. Conflict-mineralals statement available from TI.
