Texas Instruments CD4572UBPW

Overview

CD4572UBPW from Texas Instruments is a CMOS hex inverter/buffer IC with Schmitt-trigger inputs, housed in a 16-pin TSSOP (PW) package. It operates across -55°C to +125°C, supports 3V–18V supply, and features high noise immunity, low static current (≤1 µA at 18 V), and rail-to-rail output swing. It is used in waveform shaping, level translation, and digital signal conditioning in industrial control interfaces.

For engineers reviewing the CD4572UBPW datasheet, CD4572UBPW pinout, CD4572UBPW application, or CD4572UBPW equivalent, key selection criteria include its Schmitt-trigger hysteresis (typ. 2.2 V at V_DD = 15 V), propagation delay (120 ns max at 15 V), input threshold symmetry, and compatibility with legacy CD4000-series logic families in space-constrained PCB layouts.

Technical Context

The CD4572UBPW integrates six independent Schmitt-trigger inverters in a single monolithic CMOS die, each with hysteresis enabling clean digital conversion of slow or noisy analog waveforms. Its input structure provides noise margins exceeding 30% of V_DD, and output drive capability supports ±4.2 mA at V_DD = 15 V with symmetrical rise/fall times.

This device belongs to the CD4000B logic family and maintains full compatibility with standard CD4000-series AC/DC electrical specifications while offering improved noise rejection over non-Schmitt variants. It requires no external components for basic operation and functions as a standalone signal conditioner without feedback networks.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad not present, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt-trigger inverter applications.

Compared with CD4572UBM and MC14572BDR2G, the CD4572UBPW delivers superior thermal performance in dense layouts, full military-grade temperature support, and tighter hysteresis control-making it the preferred choice for high-reliability embedded control and automotive-adjacent applications.

Availability

CD4572UBPW is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control feedback systems, and power supply sequencing applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CD4572UBPW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability CMOS logic design.

The CD4572UBPW belongs to TI's CD4000B logic family, engineered for robust operation in harsh environments and designed to replace discrete resistor-capacitor Schmitt circuits in industrial control, instrumentation, and legacy system upgrades.

FAQ

What is the maximum operating frequency supported by the CD4572UBPW?

The CD4572UBPW does not specify a maximum clock frequency because it is a combinational logic device-not a clocked sequential circuit. Its usable signal bandwidth is determined by propagation delay: at V_DD = 15 V and C_L = 50 pF, t_PLH/t_PHL ≤120 ns, supporting clean edge transitions up to approximately 4 MHz for square-wave inputs. For CD4572UBPW, signal integrity depends on load capacitance and supply stability-not internal clocking.

Does the CD4572UBPW require external pull-up or pull-down resistors on its inputs?

No, the CD4572UBPW does not require external pull-up or pull-down resistors on its inputs. Its Schmitt-trigger inputs have defined high and low thresholds across the full V_DD range and remain stable at valid logic levels without biasing. Floating inputs are not recommended, but intentional use of open-circuit inputs is electrically unsafe and violates CMOS best practices-always tie unused CD4572UBPW inputs to V_DD or V_SS.

Can the CD4572UBPW drive a 50-pF capacitive load reliably at 10 MHz?

No-the CD4572UBPW is not characterized for 10 MHz operation with 50-pF loads. At V_DD = 15 V, its typical propagation delay is 60 ns and max is 120 ns, limiting practical edge repetition to <5 MHz under loaded conditions. Driving 50 pF at 10 MHz would cause excessive rise/fall time degradation and potential logic misinterpretation; for such requirements, consider faster logic families like 74LVC or dedicated drivers instead of CD4572UBPW.

Is the CD4572UBPW pin-compatible with the CD4069UB series?

No, the CD4572UBPW is not pin-compatible with the CD4069UB series. While both are hex inverters, CD4069UB has non-Schmitt inputs and a different pinout: CD4069UB places all inputs on odd pins (1, 3, 5, 9, 11, 13) and outputs on evens (2, 4, 6, 10, 12, 14), matching CD4572UBPW physically-but CD4069UB lacks hysteresis and exhibits significantly lower noise immunity. Functionally interchangeable only in noise-free, fast-edge applications; not a drop-in replacement for Schmitt-based designs.

What is the recommended bypass capacitor value and placement for the CD4572UBPW?

A 0.1 µF X7R ceramic capacitor is recommended for CD4572UBPW bypassing, placed between V_DD (pin 16) and V_SS (pin 7) as close as possible-ideally within 5 mm and using short, direct traces. This minimizes supply impedance at high frequencies and suppresses switching transients generated by simultaneous output transitions. For boards with multiple CD4572UBPW devices, one shared 0.1 µF cap per 2–3 units is acceptable if trace lengths remain minimal.