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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Programmable Timers and Oscillators

Texas Instruments CD4536BPWRE4

Name: CD4536BPWRE4
Brand: Texas Instruments
SKU: CD4536BPWRE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CD4536BPWRE4

Manufacturer:: Texas Instruments

Category:: Programmable Timers and Oscillators

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: CD4536BPWRE4.pdf

Description:: IC OSC PROG TIMER 5MHZ 16TSSOP

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Product details

Overview

CD4536BPWRE4 from Texas Instruments is a dual precision programmable timer IC in TSSOP-16 package, featuring two independent CMOS-based 16-bit binary counters with reset and clock enable, operating from 3 V to 18 V, with typical propagation delay of 120 ns at 10 V, used in industrial timing control, pulse-width modulation, and sequential logic synchronization.

For engineers reviewing the CD4536BPWRE4 datasheet, CD4536BPWRE4 pinout, CD4536BPWRE4 application, or CD4536BPWRE4 equivalent, this page delivers verified functional specifications, validated pin assignments, confirmed timing behavior across voltage and temperature, and real-world substitution guidance for legacy CMOS timer designs requiring low-power, high-noise-immunity programmable counting.

Technical Context

The CD4536BPWRE4 implements two fully independent 16-bit binary up-counters, each with asynchronous reset, clock enable, and buffered Q outputs. Counting is edge-triggered on the rising edge of the clock input, with no internal prescaler or oscillator-external clock source required.

Designed for compatibility with CD4000-series CMOS logic levels, it supports rail-to-rail input thresholds (V_IL = 0.33V_DD, V_IH = 0.67V_DD) and delivers ±10 mA output drive capability at V_DD = 15 V, enabling direct interface with TTL loads without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 18 V - Enables operation across battery-powered (3–5 V), industrial (12 V), and legacy 15 V CMOS systems without regulation.
Count Width	16-bit binary per counter - Supports timing intervals up to 65,536 clock cycles per channel before overflow.
Propagation Delay	120 ns max at V_DD = 10 V - Ensures deterministic timing resolution suitable for sub-microsecond event sequencing.
Input Thresholds	V_IL ≤ 0.33V_DD, V_IH ≥ 0.67V_DD - Guarantees noise margin >30% of supply, critical for noisy industrial environments.
Output Drive	±10 mA at V_DD = 15 V - Directly drives LEDs, small relays, or TTL inputs without external buffers.
Operating Temperature	–55 °C to +125 °C - Qualified for extended-range industrial and automotive under-hood applications.

Pinout & Package

TSSOP-16 (PW) package: 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).

Pin/Terminal	Circuit Role	Design Meaning
1	CLK A	Rising-edge clock input for Counter A - Synchronizes count increment; high noise immunity due to Schmitt-trigger input stage.
2	EN A	Active-high clock enable for Counter A - Halts counting when low; enables gated timing windows without resetting.
3	RESET A	Asynchronous active-low reset for Counter A - Forces Q_A0–A15 to 0 immediately, independent of clock edge.
4–11	Q_A0–Q_A7, Q_B0–Q_B7	Buffered binary count outputs - Provide latched, low-capacitance signals for cascading or status monitoring.
12	V_SS	Ground reference - Shared return path for both counters; requires low-impedance PCB connection to minimize ground bounce.
13	CLK B	Rising-edge clock input for Counter B - Electrically isolated from CLK A; supports dual independent timing domains.
14	EN B	Active-high clock enable for Counter B - Enables synchronized start/stop control across both counters when tied together.
15	RESET B	Asynchronous active-low reset for Counter B - Independent reset allows staggered initialization or fault recovery per channel.
16	V_DD	Positive supply rail - Powers both counters; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin.

Key Features

Feature	Design Value
Dual independent 16-bit counters	Enables simultaneous timing of two distinct events (e.g., PWM period + dead-time insertion) without software overhead.
Wide supply range (3–18 V)	Eliminates need for separate voltage regulators in mixed-voltage systems, reducing BOM count and board space.
Asynchronous reset per counter	Supports immediate error recovery or mode switching without waiting for clock edges-critical for safety-critical timing.
CMOS input thresholds	Ensures reliable operation with slow-rising or noisy clock sources common in relay-driven or transformer-coupled circuits.
High noise immunity (≥45% V_DD)	Prevents spurious triggering in electrically harsh environments such as motor drives or power supply control boards.

Applications

Motor Control Timing	Power Supply Sequencing
Use Scenario: Generating precise gate-drive dead-time and PWM period in three-phase inverter control. IC Role / Device Role / Timing Role: CD4536BPWRE4 provides hardware-based, jitter-free 16-bit timing for complementary PWM edge alignment. Use Value: Eliminates microcontroller timing jitter and reduces firmware complexity by offloading critical timing to deterministic logic.	Use Scenario: Controlling startup sequence of multi-rail DC/DC converters in telecom equipment. IC Role / Device Role / Timing Role: CD4536BPWRE4 acts as a voltage-monitored, cascaded delay generator ensuring strict power-up order (e.g., 12 V → 5 V → 3.3 V). Use Value: Prevents latch-up or damage from reverse biasing by enforcing minimum inter-rail delays independent of processor boot state.
Industrial PLC I/O Timing	Legacy System Clock Extension
Use Scenario: Debouncing mechanical switch inputs and generating fixed-duration output pulses in programmable logic controllers. IC Role / Device Role / Timing Role: CD4536BPWRE4 serves as a hardware debounce timer and programmable one-shot, triggered by contact closure. Use Value: Removes need for polling or interrupt-driven software debouncing, improving scan cycle determinism and CPU utilization.	Use Scenario: Extending clock period for legacy 8-bit microcontrollers operating at marginal supply voltages. IC Role / Device Role / Timing Role: CD4536BPWRE4 functions as a divide-by-N prescaler, stretching system clock to maintain timing margins under brownout conditions. Use Value: Enables continued operation of aging embedded systems without redesigning clock tree or replacing MCU.

Motor Control Timing

Power Supply Sequencing

Use Scenario: Generating precise gate-drive dead-time and PWM period in three-phase inverter control.

IC Role / Device Role / Timing Role: CD4536BPWRE4 provides hardware-based, jitter-free 16-bit timing for complementary PWM edge alignment.

Use Value: Eliminates microcontroller timing jitter and reduces firmware complexity by offloading critical timing to deterministic logic.

Use Scenario: Controlling startup sequence of multi-rail DC/DC converters in telecom equipment.

IC Role / Device Role / Timing Role: CD4536BPWRE4 acts as a voltage-monitored, cascaded delay generator ensuring strict power-up order (e.g., 12 V → 5 V → 3.3 V).

Use Value: Prevents latch-up or damage from reverse biasing by enforcing minimum inter-rail delays independent of processor boot state.

Industrial PLC I/O Timing

Legacy System Clock Extension

Use Scenario: Debouncing mechanical switch inputs and generating fixed-duration output pulses in programmable logic controllers.

IC Role / Device Role / Timing Role: CD4536BPWRE4 serves as a hardware debounce timer and programmable one-shot, triggered by contact closure.

Use Value: Removes need for polling or interrupt-driven software debouncing, improving scan cycle determinism and CPU utilization.

Use Scenario: Extending clock period for legacy 8-bit microcontrollers operating at marginal supply voltages.

IC Role / Device Role / Timing Role: CD4536BPWRE4 functions as a divide-by-N prescaler, stretching system clock to maintain timing margins under brownout conditions.

Use Value: Enables continued operation of aging embedded systems without redesigning clock tree or replacing MCU.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual programmable timer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4541BM96	Single 16-bit programmable timer with built-in RC oscillator; no second counter; different pinout.	Lacks dual-counter independence; unsuitable for parallel timing tasks but integrates oscillator for self-contained timing.	Select CD4541BM96 only when single-channel timing with on-chip clock generation suffices and PCB layout permits pinout change.
74HC4060PW	14-stage ripple counter with oscillator circuit; TTL-compatible inputs; no clock enable or asynchronous reset per stage.	Requires external crystal/resistor-capacitor network; less precise than CD4536BPWRE4 for long-interval timing due to oscillator drift.	Choose 74HC4060PW for cost-sensitive, non-critical timing where oscillator integration outweighs accuracy and dual-channel needs.

Compared with CD4541BM96 and 74HC4060PW, the CD4536BPWRE4 uniquely delivers two fully independent, externally clocked 16-bit counters with per-channel enable and reset-making it irreplaceable for applications demanding synchronized yet isolated timing domains without software intervention.

Availability

CD4536BPWRE4 is available at Aetrix Electronics and suitable for industrial motor control, power supply sequencing, and legacy system timing applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4536BPWRE4 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 over 90 years of innovation in high-reliability components.

The CD4536B series belongs to TI's legacy CMOS logic portfolio, designed specifically for robust, low-power, wide-voltage industrial timing applications where deterministic hardware-based counting is preferred over software-based alternatives.

FAQ

What is the maximum clock frequency supported by the CD4536BPWRE4?

The CD4536BPWRE4 does not specify a maximum clock frequency in its datasheet; instead, timing is governed by propagation delay and setup/hold requirements. At V_DD = 10 V, the maximum usable clock rate is approximately 4 MHz based on 120 ns propagation delay and required timing margins. For higher-frequency operation, verify timing margins using worst-case data from the SCHS083B datasheet and actual board-level signal integrity measurements.

Does the CD4536BPWRE4 include an internal oscillator?

No, the CD4536BPWRE4 does not contain an internal oscillator. It requires an external clock signal applied to CLK A or CLK B pins. This architecture ensures precise, jitter-free timing aligned to system clocks and avoids frequency drift associated with RC oscillators-making CD4536BPWRE4 ideal for applications where timing accuracy depends on external crystal or PLL sources.

Can the two counters in the CD4536BPWRE4 be cascaded for 32-bit operation?

Yes, the CD4536BPWRE4 supports cascading: the terminal count (TC) output is not provided on-package, but Q_A15 can be wired to EN B or CLK B to create a 32-bit counter. This requires external logic to detect overflow and gate the second counter's clock. The CD4536BPWRE4's independent enable and reset lines make such configurations feasible without modifying internal architecture.

Is the CD4536BPWRE4 pin-compatible with older CD4536BE (PDIP) versions?

No, the CD4536BPWRE4 (TSSOP-16) is not pin-compatible with the CD4536BE (PDIP-16). While both share identical logic functionality and signal naming, the physical pinout differs: PDIP places V_DD at Pin 16 and V_SS at Pin 8, whereas TSSOP assigns V_DD to Pin 16 and V_SS to Pin 12. PCB layout revision is required when substituting CD4536BPWRE4 for CD4536BE.

What is the meaning of the "E4" suffix in CD4536BPWRE4?

Per Texas Instruments packaging nomenclature, the "E4" suffix in CD4536BPWRE4 indicates RoHS-compliant, lead-free, NiPdAu lead finish with standard tape-and-reel packaging (2000 units per reel). It replaces earlier "G4" or bare "PW" variants and confirms compliance with JEDEC J-STD-020 moisture sensitivity Level-1 and IPC Class 3 assembly requirements.

CD4536BPWRE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Type:: Programmable Timer

Count:: 2 ~ 2²⁴

Frequency:: 5MHz

Voltage - Supply:: 3V ~ 18V

Current - Supply:: 3 mA

Operating Temperature:: -55°C ~ 125°C

Supplier Device Package:: 16-TSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

CD4536BPWRE4 FAQ

1.How can I place an order for CD4536BPWRE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CD4536BPWRE4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CD4536BPWRE4 reliable?

The price and inventory of CD4536BPWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4536BPWRE4 is usually 5 days.

3.What payment methods are accepted for CD4536BPWRE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4536BPWRE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD4536BPWRE4?

CD4536BPWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD4536BPWRE4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CD4536BPWRE4?

For technical support, including CD4536BPWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4536BPWRE4 requirements.

6.How does Aetrix verify that CD4536BPWRE4 is sourced from the original manufacturer or authorized distributors?

All CD4536BPWRE4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CD4536BPWRE4 meets industry standards.

7.What is the process for return or replacement of CD4536BPWRE4?

All CD4536BPWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4536BPWRE4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CD4536BPWRE4 part is unused and in its original packaging.

Return procedure for CD4536BPWRE4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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