CD4503BF Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
CD4503BF is a 6-channel non-inverting CMOS tri-state bus buffer and line driver operating from 3 V to 15 V, with active-low enable control and 50 pF load capacitance rating, housed in a 16-pin ceramic DIP package for robust signal buffering in industrial and military designs.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD4503BF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $9.7125(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD4503BF?
- 6-channel non-inverting tri-state buffer/line driver
- 3 V to 15 V wide supply voltage range (CMOS 4000 family)
- Active-low enable for easy bus control
- 50 pF load capacitance rating for driving long PCB traces
- Ceramic 16-pin DIP for high-reliability and mil-spec environments
- Unidirectional data flow with three-state high-impedance output
What is CD4503BF used for?
CD4503BF is used in industrial control systems, legacy digital signal buses, and military equipment where wide 3 V to 15 V supply compatibility and ceramic package reliability are required. It serves as a bus interface buffer for CMOS logic systems, enabling multiple data sources to share a common line while preventing bus contention via tri-state control. The device also finds application in PLCs and process controllers that require robust signal conditioning over 50 pF capacitive loads.
What are the specifications of CD4503BF?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | ONE FUNCTION WITH TWO BITS |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-CDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.0023A |
| Number of Bits | 4 |
| Number of Functions | 6 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | CERAMIC, METAL-SEALED COFIRED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.06mA |
| Prop. Delay@Nom-Sup | 150ns |
| Propagation Delay (tpd) | 150ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD4503BF datasheet?
CD4503BF Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4503BF?
Compatible alternatives and drop-in replacements for CD4503BF:
Bus Driver, 4000/14000/40000 Series, 6-Func, 4-Bit, True Output, CMOS, PDIP16
Bus Driver, 4000/14000/40000 Series, 6-Func, 4-Bit, True Output, CMOS, CDIP16
Frequently Asked Questions
How does CD4503BF achieve bus isolation when multiple drivers share a signal line?
CD4503BF uses tri-state outputs controlled by the active-low enable pin. When disabled, all 6 outputs enter high-impedance mode, effectively disconnecting the device from the bus. This allows multiple CD4503BF drivers to share a 50 pF capacitive bus without signal contention.
What supply voltage range does CD4503BF support, and why does that matter for legacy systems?
CD4503BF operates from 3 V to 15 V, covering both modern 3.3 V logic and legacy 5 V and 12 V CMOS systems. This flexibility makes it directly compatible with 4000-series CMOS logic families used in decades-old industrial and military equipment that must interface with newer lower-voltage circuitry.
Why does CD4503BF use a ceramic DIP package instead of a plastic one?
The ceramic 16-pin DIP package offers superior moisture resistance, temperature stability from -55°C to +125°C, and longer service life compared to plastic equivalents. These properties are critical in military, aerospace, and industrial control applications where field replacement is costly and operating environments are harsh.
Can CD4503BF replace a 74HC126 quad tri-state buffer in a mixed-logic design?
CD4503BF provides 6 channels versus the 4 channels on 74HC126, and its 3 V to 15 V supply range accommodates mixed 5 V and 12 V CMOS logic. However, 74HC126 offers faster propagation delay at 6 ns versus CD4503BF's slower CMOS 4000-family timing, so suitability depends on whether drive count or speed is the primary design constraint.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $11.8125 | $11.81 |
| 8+ | $10.5000 | $84.00 |
| 25+ | $9.7125 | $242.81 |
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