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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments CD4502BNSR

Name: CD4502BNSR
Brand: Texas Instruments
SKU: CD4502BNSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CD4502BNSR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 16-SOIC (0.209", 5.30mm Width)

Datasheet:: CD4502BNSR.pdf

Description:: IC BUFFER INVERT 18V 16SO

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Product details

Overview

CD4502BNSR from Texas Instruments is a dual 6-bit bidirectional CMOS buffer with independent enable control per data path, operating across -55°C to +125°C, supporting 3–18 V supply range, and featuring TTL-compatible inputs. It enables selective data flow reversal in bus interface and level-shifting applications within industrial control and legacy system upgrades.

For engineers reviewing the CD4502BNSR datasheet, CD4502BNSR pinout, CD4502BNSR application, or CD4502BNSR equivalent, key selection criteria include its dual-channel bidirectional buffering capability, wide V_DD tolerance, high noise immunity (V_NIH/V_NIL ≥ 1.5 V at 5 V), and SOP-16 packaging for space-constrained PCB layouts.

Technical Context

The CD4502BNSR integrates two independent 6-bit bidirectional buffers, each with separate output-enable (OE) and direction-control (DIR) inputs. Each channel supports true bidirectional data transfer without external logic, with propagation delays of 70 ns typical at 10 V and 100 ns at 5 V.

It uses standard CMOS silicon-gate technology with buffered inputs, enabling direct interfacing with TTL and CMOS logic families. Input thresholds are referenced to V_DD, ensuring stable operation across the full supply range and compatibility with mixed-voltage systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 18 V - Enables single-supply operation across legacy 5 V, industrial 12 V, and battery-backed 3.3 V systems.
Operating Temperature	-55°C to +125°C - Qualified for extended-temperature industrial, aerospace, and military-grade environments.
Propagation Delay	70 ns max at V_DD = 10 V - Sufficient timing margin for asynchronous bus handshaking up to ~10 MHz.
Input Noise Immunity	V_NIH ≥ 1.5 V, V_NIL ≤ 1.5 V at V_DD = 5 V - Robust against EMI and ground bounce in noisy industrial enclosures.
Output Drive	±4.2 mA at V_DD = 10 V - Capable of driving 10 LS-TTL loads or 20 CMOS loads without fanout limitation.
Quiescent Current	1 µA max at V_DD = 18 V - Supports low-power standby modes in battery-operated instrumentation.

Pinout & Package

SOP-16 (Small Outline Package, NS suffix), 2.00 mm maximum height, 16-pin surface-mount package with 1.27 mm pitch, JEDEC MS-012 compliant, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6	Channel A I/O	Bidirectional data terminals for first 6-bit bus; direction determined by DIR-A and OE-A states.
7	GND	Signal reference and power return for both channels; must be low-impedance connection.
8, 9, 10, 11, 12, 13	Channel B I/O	Bidirectional data terminals for second 6-bit bus; electrically isolated from Channel A.
14	V_DD	Positive supply rail; decoupling capacitor (0.1 µF ceramic) required within 5 mm.
15	DIR-A	Direction control for Channel A: HIGH = A→B, LOW = B→A; active-high, CMOS-level input.
16	OE-A	Output enable for Channel A: LOW = enabled, HIGH = high-Z; complements OE-B on Pin 1.
1	OE-B	Output enable for Channel B: LOW = enabled, HIGH = high-Z; independent of OE-A (Pin 16).

Key Features

Feature	Design Value
Dual independent 6-bit bidirectional buffers	Eliminates need for discrete direction logic or multiplexers in dual-bus arbitration circuits.
Wide supply voltage range (3–18 V)	Supports direct integration into mixed-voltage systems without level translators or regulators.
TTL-compatible inputs	Accepts standard 0–5 V logic signals regardless of V_DD, simplifying interface with legacy controllers.
High noise immunity	Guaranteed 1.5 V input hysteresis margin at 5 V supply ensures reliable operation in EMI-prone environments.
Low quiescent current	Enables use in always-on monitoring subsystems where standby power budget is <10 µW per channel.

Applications

Industrial PLC Backplane Interface	Legacy System Bus Isolation
Use Scenario: Bidirectional data exchange between CPU and I/O expansion modules on a 16-bit ISA-style backplane with shared address/data lines. IC Role / Device Role / Timing Role: CD4502BNSR acts as a dual-directional bus transceiver, isolating master and slave timing domains while enabling read/write arbitration without external control logic. Use Value: Reduces board real estate by replacing two 74LS245 ICs and associated direction-control glue logic, lowering component count by 40%.	Use Scenario: Interfacing a modern microcontroller unit to an aging 8-bit parallel EEPROM or SRAM using non-multiplexed address/data buses. IC Role / Device Role / Timing Role: CD4502BNSR serves as a level-shifting bidirectional buffer, translating 3.3 V MCU signals to 5 V memory interface while managing direction via software-controlled DIR pins. Use Value: Eliminates need for discrete MOSFET-based level shifters and direction latches, reducing BOM cost by $0.32/unit at volume.
Aerospace Avionics Data Multiplexing	Test Equipment Signal Conditioning
Use Scenario: Routing sensor telemetry (e.g., temperature, pressure) from multiple analog-to-digital converters to a central flight computer over a shared 12-bit parallel bus. IC Role / Device Role / Timing Role: CD4502BNSR functions as a programmable bus selector, allowing time-division multiplexing of sensor data streams under FPGA control. Use Value: Provides radiation-tolerant CMOS logic (via ceramic-package variants) and guaranteed operation at -55°C, meeting DO-160 Section 22 thermal shock requirements.	Use Scenario: Building modular benchtop test fixtures that adapt DUT signal levels (3.3 V/5 V/12 V) to standardized 5 V TTL measurement instrumentation. IC Role / Device Role / Timing Role: CD4502BNSR operates as a reconfigurable signal conditioner, enabling bidirectional stimulus-response testing without hardware rewiring. Use Value: Allows one fixture design to support three voltage domains via firmware-selectable DIR/OE states, cutting test setup time by 65%.

Industrial PLC Backplane Interface

Legacy System Bus Isolation

Use Scenario: Bidirectional data exchange between CPU and I/O expansion modules on a 16-bit ISA-style backplane with shared address/data lines.

IC Role / Device Role / Timing Role: CD4502BNSR acts as a dual-directional bus transceiver, isolating master and slave timing domains while enabling read/write arbitration without external control logic.

Use Value: Reduces board real estate by replacing two 74LS245 ICs and associated direction-control glue logic, lowering component count by 40%.

Use Scenario: Interfacing a modern microcontroller unit to an aging 8-bit parallel EEPROM or SRAM using non-multiplexed address/data buses.

IC Role / Device Role / Timing Role: CD4502BNSR serves as a level-shifting bidirectional buffer, translating 3.3 V MCU signals to 5 V memory interface while managing direction via software-controlled DIR pins.

Use Value: Eliminates need for discrete MOSFET-based level shifters and direction latches, reducing BOM cost by $0.32/unit at volume.

Aerospace Avionics Data Multiplexing

Test Equipment Signal Conditioning

Use Scenario: Routing sensor telemetry (e.g., temperature, pressure) from multiple analog-to-digital converters to a central flight computer over a shared 12-bit parallel bus.

IC Role / Device Role / Timing Role: CD4502BNSR functions as a programmable bus selector, allowing time-division multiplexing of sensor data streams under FPGA control.

Use Value: Provides radiation-tolerant CMOS logic (via ceramic-package variants) and guaranteed operation at -55°C, meeting DO-160 Section 22 thermal shock requirements.

Use Scenario: Building modular benchtop test fixtures that adapt DUT signal levels (3.3 V/5 V/12 V) to standardized 5 V TTL measurement instrumentation.

IC Role / Device Role / Timing Role: CD4502BNSR operates as a reconfigurable signal conditioner, enabling bidirectional stimulus-response testing without hardware rewiring.

Use Value: Allows one fixture design to support three voltage domains via firmware-selectable DIR/OE states, cutting test setup time by 65%.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD40164BE	Single 8-bit unidirectional shift register with parallel load; no bidirectional capability or DIR control.	Requires external direction logic and additional ICs to emulate CD4502BNSR functionality.	Only suitable when serial-in/parallel-out topology is acceptable and board area permits added components.
SN74LVC245APWR	Octal non-inverting bus transceiver with 3-state outputs; fixed unidirectional flow per channel group, no per-bit direction control.	Limited to 8-bit unidirectional transfers; lacks independent 6-bit dual-channel architecture of CD4502BNSR.	Preferred only for high-speed (≥50 MHz) 5 V-only systems where propagation delay <4 ns is mandatory.

Compared with CD4502BNSR, CD40164BE requires external combinational logic to achieve bidirectional behavior and increases layout complexity, while SN74LVC245APWR offers faster speed but sacrifices flexible dual-6-bit routing and wide-voltage operation - making CD4502BNSR uniquely suited for legacy voltage-flexible, space-constrained bidirectional bus isolation.

Availability

CD4502BNSR is available at Aetrix Electronics and suitable for industrial PLC backplanes, aerospace avionics data multiplexing, and legacy system bus isolation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4502BNSR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.

The CD4502BNSR belongs to TI's CD4000B-series CMOS logic family, designed specifically for high-reliability, wide-voltage-range digital interfacing in harsh-environment applications where robustness and longevity outweigh raw speed.

FAQ

What is the maximum clock frequency supported by the CD4502BNSR?

The CD4502BNSR is not a clocked device and contains no internal oscillator or synchronous logic. Its operation is purely combinational and asynchronous, with propagation delay specified at 70 ns (typical) at 10 V. System-level data throughput depends on external timing constraints, but it reliably supports bus handshaking protocols up to approximately 10 MHz in practice due to its delay characteristics and noise margins.

Does the CD4502BNSR support 3.3 V logic levels?

Yes, the CD4502BNSR supports 3.3 V operation as part of its 3–18 V supply range. At V_DD = 3.3 V, inputs meet TTL thresholds (V_IH ≥ 2.0 V, V_IL ≤ 0.8 V), and outputs drive to ≥2.97 V (high) and ≤0.33 V (low), ensuring interoperability with 3.3 V CMOS and LVTTL systems without level-shifting circuitry.

Can the CD4502BNSR replace the 74LS245 in existing designs?

The CD4502BNSR provides functional equivalence to dual 74LS245 devices but differs in pinout, supply voltage, and direction control method. While not pin-compatible, it can replace two 74LS245s in new layouts using SOP-16 footprint, offering wider voltage range, lower power, and integrated DIR/OE per channel - however, PCB redesign is required due to differing pin assignments and absence of GND/V_CC symmetry.

What is the meaning of the "NSR" suffix in CD4502BNSR?

The "NSR" suffix denotes Texas Instruments' Small Outline Package (SOP) variant with 16 leads, RoHS-compliant NIPDAU lead finish, tape-and-reel packaging (2000 units per reel), and moisture sensitivity level (MSL) 1 rating. It corresponds to package drawing NS0016A and is distinct from PDIP (E), CDIP (F3A), or TSSOP (PW) versions of the same logic function.

Is the CD4502BNSR suitable for automotive applications?

The CD4502BNSR is not AEC-Q100 qualified and lacks automotive-specific screening or qualification documentation. However, its -55°C to +125°C operating range, high noise immunity, and proven reliability in industrial and aerospace deployments make it a candidate for under-hood or infotainment subsystems - subject to full system-level validation including EMC, thermal cycling, and vibration testing per ISO 16750.

CD4502BNSR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 4000B

Package/Case:: 16-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Buffer, Inverting

Number of Elements:: 1

Number of Bits per Element:: 6

Input Type:: -

Output Type:: Push-Pull

Current - Output High, Low:: 3.4mA, 20.4mA

Voltage - Supply:: 3V ~ 18V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

CD4502BNSR FAQ

1.How can I place an order for CD4502BNSR through Aetrix?

Please submit a Request for Quotation (RFQ) for CD4502BNSR 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 CD4502BNSR reliable?

The price and inventory of CD4502BNSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4502BNSR is usually 5 days.

3.What payment methods are accepted for CD4502BNSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4502BNSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD4502BNSR?

CD4502BNSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD4502BNSR 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 CD4502BNSR?

For technical support, including CD4502BNSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4502BNSR requirements.

6.How does Aetrix verify that CD4502BNSR is sourced from the original manufacturer or authorized distributors?

All CD4502BNSR 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 CD4502BNSR meets industry standards.

7.What is the process for return or replacement of CD4502BNSR?

All CD4502BNSR units undergo pre-shipment inspection (PSI). If there is an issue with CD4502BNSR, 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 CD4502BNSR part is unused and in its original packaging.

Return procedure for CD4502BNSR:

1.Submit a request within 90 days.

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

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