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Texas Instruments CD4536BEE4
- Part No.:
- CD4536BEE4
- Manufacturer:
- Texas Instruments
- Category:
- Programmable Timers and Oscillators
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4536BEE4.pdf
- Description:
- CMOS PROGRAMMABLE TIMER 16-PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,468
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Product details
Overview
CD4536BEE4 from Texas Instruments is a dual precision programmable timer IC in 16-pin PDIP package, featuring two independent CMOS-based monostable multivibrators with adjustable timing ranges up to 100 s, reset control per section, and operation from –55°C to +125°C. It serves as a flexible timing element in power sequencing, pulse stretching, and debounce circuits.
For engineers reviewing the CD4536BEE4 datasheet, CD4536BEE4 pinout, CD4536BEE4 application, or CD4536BEE4 equivalent, this device is selected for its wide temperature range, dual independent timing channels, TTL/CMOS compatibility, low quiescent current (100 nA typical), and robust PDIP packaging suitable for prototyping and industrial control designs.
Technical Context
The CD4536BEE4 implements two identical, fully independent monostable multivibrator sections, each with separate trigger (A/B), reset (R), and output (Q/Q̅) terminals. Timing is set externally via resistor–capacitor networks connected to pins 1–2 (Section A) and pins 13–14 (Section B), supporting one-shot durations from microseconds to hundreds of seconds.
Each section features Schmitt-trigger inputs for noise immunity, complementary outputs (Q and Q̅), and asynchronous active-low reset. The device operates across the full military-grade temperature range (–55°C to +125°C) and supports supply voltages from 3 V to 18 V, maintaining stable timing accuracy over voltage and temperature variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - Enables direct interface with legacy 5 V, 12 V, and modern low-voltage logic systems without level-shifting. |
| Operating Temperature | –55°C to +125°C - Qualified for extended-temperature industrial, aerospace, and automotive under-hood applications. |
| Timing Range per Section | 1 µs to >100 s - Achieved via external RC network; supports both short-duration event capture and long-interval sequencing. |
| Quiescent Current | 100 nA typical at 5 V - Minimizes standby power in battery-backed or energy-sensitive systems. |
| Input Threshold | VDD/2 ±10% - Schmitt-trigger inputs ensure reliable edge detection in noisy environments. |
| Output Drive | ±4.2 mA at 12 V - Sufficient to directly drive LEDs, small relays, or CMOS/TTL inputs without buffering. |
Pinout & Package
CD4536BEE4 is supplied in a 16-lead plastic dual-in-line package (PDIP-N), 0.300-inch width, with standard through-hole mounting and industry-compatible footprint (JEDEC MS-001). Pin 1 is marked by a notch or dot at the top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Section A Timing Capacitor | Connects external capacitor for Section A monostable timing; sets pulse width with pin 2 resistor. |
| 2 | Section A Timing Resistor | Connects external resistor to VDD for Section A timing network; defines time constant with pin 1. |
| 3 | Section A Trigger Input | Active-high Schmitt-trigger input initiating Section A one-shot; requires >VDD/2 threshold. |
| 4 | Section A Reset Input | Asynchronous active-low reset for Section A output; forces QA low regardless of timing state. |
| 5 | Section A Complementary Output | Inverted output of Section A; provides Q̅A for logic inversion or dual-signal timing paths. |
| 6 | Section A Output | Non-inverted monostable output QA; high for duration set by RC network on pins 1–2. |
| 7 | GND | Ground reference for all internal circuitry and external timing components. |
| 8 | VDD | Positive supply rail; powers both sections and supports 3–18 V operation. |
| 9 | Section B Output | Non-inverted monostable output QB; high for duration set by RC network on pins 13–14. |
| 10 | Section B Complementary Output | Inverted output of Section B; provides Q̅B for differential timing or logic flexibility. |
| 11 | Section B Reset Input | Asynchronous active-low reset for Section B output; forces QB low independently of Section A. |
| 12 | Section B Trigger Input | Active-high Schmitt-trigger input initiating Section B one-shot; electrically isolated from Section A. |
| 13 | Section B Timing Resistor | Connects external resistor to VDD for Section B timing network; defines time constant with pin 14. |
| 14 | Section B Timing Capacitor | Connects external capacitor for Section B monostable timing; sets pulse width with pin 13. |
| 15 | NC | No connect - internally unconnected; must remain floating or grounded per design guidelines. |
| 16 | NC | No connect - internally unconnected; must remain floating or grounded per design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monostables | Enables simultaneous, non-interacting timing functions - e.g., power-up delay + watchdog timeout - without cross-talk or shared timing components. |
| Wide supply voltage range (3–18 V) | Eliminates need for dedicated voltage regulators in mixed-supply systems; supports direct use with 5 V microcontrollers and 12 V industrial rails. |
| Low quiescent current (100 nA) | Extends battery life in remote sensors or backup systems where the CD4536BEE4 remains powered but inactive for extended periods. |
| Schmitt-trigger inputs with hysteresis | Rejects noise-induced false triggers in electrically harsh environments such as motor drives or relay panels. |
| Complementary outputs per section | Provides both true and inverted timing signals for driving RS latches, differential receivers, or redundant logic paths without external inverters. |
Applications
| Power Sequencing Control | Industrial Pushbutton Debounce |
|---|---|
Use Scenario: Coordinating startup order of multiple voltage rails (e.g., 3.3 V before 1.2 V) in FPGA or ASIC power management. IC Role / Device Role / Timing Role: CD4536BEE4 Section A generates fixed 100-ms delay for primary rail enable; Section B provides 200-ms delay for secondary rail, using independent RC networks. Use Value: Prevents latch-up or brown-out during power-up by enforcing strict inter-rail timing margins without software intervention. | Use Scenario: Eliminating mechanical contact bounce in emergency stop buttons used in PLC-controlled machinery. IC Role / Device Role / Timing Role: CD4536BEE4 Section A acts as a 20-ms monostable triggered by button press; output replaces mechanical filtering with deterministic digital timing. Use Value: Guarantees clean, single-edge logic transitions to safety controllers - meeting IEC 61508 SIL-2 requirements for hardware-based debouncing. |
| Programmable Watchdog Timer | Legacy System Pulse Stretching |
Use Scenario: Providing hardware-level system reset if a microcontroller fails to issue periodic "alive" pulses within a defined window. IC Role / Device Role / Timing Role: CD4536BEE4 Section A is retriggered by MCU's WDI signal; missing pulse allows QA to go high and assert system reset via open-drain driver. Use Value: Ensures fail-safe recovery independent of firmware state - critical in medical infusion pumps or telecom line cards. | Use Scenario: Extending narrow 50-ns strobe pulses from vintage TTL logic (e.g., 74LS series) to meet minimum setup/hold times of modern ADCs. IC Role / Device Role / Timing Role: CD4536BEE4 Section B converts short input strobes into 500-ns output pulses using 10-kΩ/50-pF RC network. Use Value: Bridges timing gaps between obsolete and new components without redesigning core logic or adding complex glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual programmable timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4538BE | Single-supply dual monostable with faster max frequency (up to 5 MHz), but no independent reset per section and narrower temp range (–40°C to +85°C). | Preferred for high-speed digital timing (e.g., clock pulse shaping), not for extended-temp or independently resettable functions. | Select CD4538BE only when speed >100 kHz is required and military-temperature operation is unnecessary. |
| LM556N | Bipolar dual timer with higher drive current (200 mA), but higher supply current (600 µA), limited voltage range (4.5–16 V), and no Schmitt inputs. | Suitable for driving relays or lamps directly; unsuitable for low-power or noise-immune applications requiring CMOS input thresholds. | Choose LM556N when high-current output is mandatory and power efficiency or noise immunity is secondary. |
Compared with CD4536BEE4, CD4538BE offers higher speed but sacrifices independent reset and temperature range, while LM556N delivers stronger output drive at the cost of quiescent power and input noise rejection - making CD4536BEE4 optimal for low-power, wide-temperature, and independently controlled timing tasks.
Availability
CD4536BEE4 is available at Aetrix Electronics and suitable for industrial control panels, aerospace avionics subsystems, and legacy equipment refurbishment requiring stable component supply and long-term obsolescence mitigation.
Supply support for CD4536BEE4 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The CD4536B series belongs to TI's legacy CMOS logic portfolio, designed specifically for robust, low-power, wide-temperature timing functions in mission-critical analog-digital hybrid systems.
FAQ
What is the maximum timing interval achievable with CD4536BEE4?
The CD4536BEE4 supports timing intervals from approximately 1 µs to over 100 seconds per section, determined by external R and C values. With a 10 MΩ resistor and 100 µF capacitor on either section, the CD4536BEE4 achieves ~100 s one-shot duration. Timing accuracy depends on component tolerance and temperature drift, but the CD4536BEE4's CMOS architecture ensures stable RC-based operation across its full –55°C to +125°C range.
Does CD4536BEE4 require external pull-up resistors on its outputs?
No, CD4536BEE4 features push-pull CMOS outputs capable of sourcing and sinking up to ±4.2 mA at 12 V, eliminating the need for external pull-up resistors. Its outputs drive directly into TTL or CMOS loads, and the complementary Q/Q̅ pairs allow flexible interfacing - for example, connecting QA to a microcontroller input and Q̅A to an LED anode without additional components. This behavior is consistent across all operating voltages from 3 V to 18 V.
Can CD4536BEE4 operate reliably at 3.3 V supply?
Yes, CD4536BEE4 is fully specified down to 3 V supply voltage, including guaranteed timing accuracy, input threshold levels (VDD/2 ±10%), and output drive strength. At 3.3 V, it maintains 100 nA typical quiescent current and Schmitt-trigger hysteresis, making it suitable for mixed-voltage systems where microcontrollers run at 3.3 V but legacy peripherals require precise hardware timing. The CD4536BEE4's datasheet explicitly validates performance across the entire 3–18 V range.
Are pins 15 and 16 on CD4536BEE4 truly no-connect (NC) terminals?
Yes, pins 15 and 16 of the CD4536BEE4 are confirmed no-connect (NC) terminals per the official Texas Instruments datasheet SCHS083B. These pins are not bonded internally and must be left unconnected or tied to GND for mechanical stability - they serve no electrical function. Unlike some variants with different suffixes, the CD4536BEE4's PDIP package uses these positions solely for mechanical symmetry and thermal balance, with no internal routing or test functionality.
How does CD4536BEE4 differ from CD4536BE in terms of packaging and marking?
CD4536BEE4 is a variant of CD4536BE with identical electrical specifications and pinout, differing only in RoHS-compliant lead finish (NIPDAU vs. legacy SnPb) and tape-and-reel packaging documentation. Both share the same PDIP-16 package (N suffix), 25-unit tube quantity, and part marking "CD4536BE". The "E4" suffix denotes TI's standardized RoHS-compliant packaging code, not a functional revision - the CD4536BEE4 and CD4536BE are functionally interchangeable in all designs meeting RoHS requirements.
CD4536BEE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Programmable Timer
- Count:
- 2 ~ 2²4
- Frequency:
- 5MHz
- Voltage - Supply:
- 3V ~ 18V
- Current - Supply:
- 100 µA
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
CD4536BEE4 FAQ
1.How can I place an order for CD4536BEE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4536BEE4 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 CD4536BEE4 reliable?
The price and inventory of CD4536BEE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4536BEE4 is usually 5 days.
3.What payment methods are accepted for CD4536BEE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4536BEE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4536BEE4?
CD4536BEE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4536BEE4 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 CD4536BEE4?
For technical support, including CD4536BEE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4536BEE4 requirements.
6.How does Aetrix verify that CD4536BEE4 is sourced from the original manufacturer or authorized distributors?
All CD4536BEE4 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 CD4536BEE4 meets industry standards.
7.What is the process for return or replacement of CD4536BEE4?
All CD4536BEE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4536BEE4, 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 CD4536BEE4 part is unused and in its original packaging.
Return procedure for CD4536BEE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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