NXP Semiconductors HEF4528BP,652

Overview

HEF4528BP,652 from Nexperia is a dual retriggerable-resettable monostable multivibrator IC in SO16 package, operating from 3 V to 15 V supply, delivering programmable output pulse widths via external R_EXT/C_EXT networks, with active-LOW clear inputs and complementary outputs-used in timing control, debounce, and pulse shaping circuits.

For engineers reviewing the HEF4528BP,652 datasheet, HEF4528BP,652 pinout, HEF4528BP,652 application, or HEF4528BP,652 equivalent, key selection factors include its dual independent monostable architecture, wide voltage range (3–15 V), guaranteed operation from –40 °C to +85 °C, CMOS low-power static operation, and JEDEC JESD13-B compliance.

Technical Context

Each of the two monostable sections features dual trigger inputs (nA active-HIGH-to-LOW, nB active-LOW-to-HIGH), an active-LOW direct clear (nCD), complementary outputs (nQ, nQ), and dedicated external timing pins (nCEXT grounded, nREXT/CEXT connected to R_EXT–C_EXT network).

Pulse width t_W is determined by t_W = K × R_EXT × C_EXT, where K = 0.42 (V_DD = 5 V), 0.32 (10 V), or 0.30 (15 V); propagation delays range from 27 ns (15 V, C_L = 0 pF) to 305 ns (5 V, C_L = 50 pF), with transition times as low as 6 ns.

Key Specifications

Pinout & Package

HEF4528BP,652 is housed in a plastic small outline package (SO16), SOT109-1 variant, with 3.9 mm body width and 1.27 mm lead pitch - compatible with standard surface-mount reflow processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar monostable multivibrator applications.

Compared with CD4528BE and 74HC4538D, HEF4528BP,652 uniquely balances wide supply range (3–15 V), industrial temperature rating, retriggerable-resettable operation, and SO16 footprint - making it optimal for general-purpose industrial timing where voltage flexibility and functional completeness are prioritized over extreme speed or extended temperature.

Availability

HEF4528BP,652 is available at Aetrix Electronics and suitable for industrial control panels, test equipment, power supply sequencing, and embedded timing applications requiring stable component supply across long production lifecycles.

Supply support for HEF4528BP,652 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions - serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality standards.

The HEF4528BP,652 belongs to Nexperia's HEF4000B series of CMOS logic ICs, designed specifically for robust, low-power timing and sequential control in industrial and instrumentation applications where wide supply range and temperature stability are essential.

FAQ

What is the maximum external timing resistor value supported by HEF4528BP,652?

The HEF4528BP,652 supports R_EXT values up to 2 MΩ across its full 3–15 V supply range, as specified in Table 7 under "External timing resistor". This allows pulse widths from nanoseconds to seconds depending on C_EXT selection - e.g., R_EXT = 2 MΩ and C_EXT = 100 nF yields ~60 ms at 15 V using t_W = 0.30 × R_EXT × C_EXT. Values beyond 2 MΩ may cause timing inaccuracies or failure to trigger reliably.

Can HEF4528BP,652 operate with a 3.3 V supply?

Yes, HEF4528BP,652 is fully specified down to 3 V supply per Table 5 (Recommended operating conditions). At 3.3 V, VIH is ~2.3 V and VIL is ~1.1 V, ensuring compatibility with 3.3 V logic families. Propagation delay increases (e.g., ~280 ns typ at 50 pF), and output drive reduces (~0.36 mA I_OL), but functionality remains intact for moderate-speed timing tasks.

How does the retriggerable feature work in HEF4528BP,652?

In HEF4528BP,652, a new trigger (on nA or nB) occurring before the current output pulse ends will restart the timing cycle - extending the nQ pulse width. This is enabled by internal state logic that monitors both inputs and timing capacitor discharge. Retriggering occurs only when nCD is HIGH; if nCD is LOW, all triggers are ignored until cleared.

Is HEF4528BP,652 pin-compatible with older HEF4528P variants?

No - HEF4528BP,652 uses the SO16 (SOT109-1) package, while legacy HEF4528P was in DIP-16 or ceramic packages (e.g., SOT38-4, now discontinued). Pin numbering and physical dimensions differ; PCB layout must be redesigned. Electrical behavior is identical, but mechanical fit is not interchangeable.

What is the minimum pulse width achievable with HEF4528BP,652?

The shortest guaranteed pulse width is ~140 ns (at V_DD = 15 V, R_EXT = 5 kΩ, C_EXT = 15 pF), per Table 7. With smaller R_EXT/C_EXT, pulse width scales linearly - e.g., R_EXT = 1 kΩ and C_EXT = 1 pF yields ~0.3 ns theoretical, but practical limits (propagation delay, transition time) constrain usable minimum to ~35 ns (t_PHL min at 15 V).