My Inquiry
My Account
Texas Instruments CD4503BEG4
- Part No.:
- CD4503BEG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4503BEG4.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,159
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD4503BEG4 from Texas Instruments is a hex noninverting buffer IC with 3-state outputs, high sink- and source-current capability (±24 mA at VDD = 15 V), dual independent output-enable controls (OE1 for buffers 1–4, OE2 for buffers 5–6), and operates across –55°C to +125°C. It serves as a level-shifting bus interface in mixed-voltage digital systems requiring isolated group enable.
For engineers reviewing the CD4503BEG4 datasheet, CD4503BEG4 pinout, CD4503BEG4 application, or CD4503BEG4 equivalent, this device is selected for its dual-gated 3-state drive, wide supply range (3 V to 18 V), and compatibility with legacy CMOS logic families in industrial control backplanes and test instrumentation interfaces.
Technical Context
The CD4503BEG4 implements six independent noninverting buffer stages, each with three-state output controlled by two shared enable inputs-OE1 (pins 1 & 2) enables Y1–Y4, OE2 (pin 15) enables Y5–Y6. All outputs are fully buffered and capable of driving capacitive loads up to 50 pF while maintaining specified propagation delay (typ. 70 ns at VDD = 15 V).
It uses standard CMOS silicon process technology, supports rail-to-rail input voltage range (0 V to VDD), and features high noise immunity (VNIH/VNIL ≥ 45% VDD). No internal pull-ups or level translators are integrated-the device relies on external voltage domain management for bidirectional level shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Hex noninverting buffer with dual 3-state enable controls |
| Supply Voltage Range | 3 V to 18 V - supports direct interfacing between 5 V, 12 V, and 15 V logic domains |
| Output Drive (IOH/IOL) | ±24 mA at VDD = 15 V - sufficient to drive multiple 74HC inputs or small LED loads without external buffers |
| Propagation Delay (tPLH/tPHL) | 70 ns max at VDD = 15 V, CL = 50 pF - suitable for ≤10 MHz clock/data buffering in control logic |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and aerospace environments |
| Input Logic Compatibility | CMOS-level inputs (VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD) - interoperable with CD4000, 74HC, and TTL via pull-up resistors |
Pinout & Package
CD4503BEG4 is supplied in a 16-lead plastic dual-in-line package (PDIP-N), 19.1 mm × 6.6 mm body, 2.54 mm lead pitch, with pin 1 identified by notch or dot. Lead finish is NiPdAu (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 (OE1) | Output Enable 1 (active-low) | Controls 3-state output of Y1–Y4; both pins tied internally - either may be used as single enable input |
| 3 (A1) | Input 1 | Noninverting input for buffer stage 1; compatible with full VDD swing |
| 4 (Y1) | Output 1 | 3-state noninverting output driven by A1 when OE1 low |
| 5 (A2) | Input 2 | Noninverting input for buffer stage 2 |
| 6 (Y2) | Output 2 | 3-state noninverting output driven by A2 when OE1 low |
| 7 (GND) | Ground | Reference return for all inputs, outputs, and internal logic |
| 8 (Y3) | Output 3 | 3-state noninverting output driven by A3 when OE1 low |
| 9 (A3) | Input 3 | Noninverting input for buffer stage 3 |
| 10 (Y4) | Output 4 | 3-state noninverting output driven by A4 when OE1 low |
| 11 (A4) | Input 4 | Noninverting input for buffer stage 4 |
| 12 (Y5) | Output 5 | 3-state noninverting output driven by A5 when OE2 low |
| 13 (A5) | Input 5 | Noninverting input for buffer stage 5 |
| 14 (Y6) | Output 6 | 3-state noninverting output driven by A6 when OE2 low |
| 15 (OE2) | Output Enable 2 (active-low) | Controls 3-state output of Y5–Y6 only |
| 16 (VDD) | Positive Supply | Power rail for all six buffers; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enable groups | OE1 controls Y1–Y4; OE2 controls Y5–Y6 - enables selective bus partitioning without external gating logic |
| High current drive (±24 mA) | Eliminates need for discrete transistor buffers when driving moderate fan-out or capacitive loads |
| Wide supply range (3 V to 18 V) | Permits use in legacy 12 V/15 V systems and modern low-voltage designs without level-shifter ICs |
| Extended temperature operation (–55°C to +125°C) | Validated for deployment in uncontrolled industrial enclosures and avionics subsystems |
| CMOS input thresholds | Ensures reliable switching across full VDD range without external biasing networks |
Applications
| Industrial Backplane Interface | Automated Test Equipment (ATE) Signal Routing |
|---|---|
Use Scenario: Isolating and enabling signal paths between microcontroller I/O banks and field I/O modules operating at different supply voltages. IC Role / Device Role / Timing Role: Level-translating bus buffer with grouped enable control for hot-swap-safe module insertion. Use Value: Prevents bus contention during module replacement by independently disabling subsets of drivers via OE1/OE2. |
Use Scenario: Routing digital stimulus and response signals between pattern generator and DUT across multiple test channels. IC Role / Device Role / Timing Role: Noninverting repeater with 3-state isolation to prevent signal leakage between test channels. Use Value: Enables channel-by-channel signal gating without timing skew, supporting parallel test execution at ≤10 MHz. |
| Military Data Acquisition System | Legacy Instrumentation Bus Expansion |
Use Scenario: Interfacing radiation-tolerant FPGAs to analog front-end ADCs in airborne telemetry units. IC Role / Device Role / Timing Role: Robust CMOS buffer providing ESD-hardened signal integrity over wide temperature excursions. Use Value: Maintains <100 ns propagation delay stability across –55°C to +125°C, critical for time-stamped sensor sampling. |
Use Scenario: Expanding address/data bus capacity in vintage oscilloscopes and spectrum analyzers using 4000-series logic. IC Role / Device Role / Timing Role: Pin-compatible upgrade to CD4050B with enhanced drive strength and dual-enable flexibility. Use Value: Doubles functional density per package versus dual 3-buffer ICs, reducing board space and interconnect count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4050BM96 | Single enable control for all six outputs; lower drive (±4.2 mA at 15 V); no dual-group gating | Suitable only where global 3-state control suffices; not usable for partial bus isolation | Select CD4050BM96 only if simplified enable architecture and reduced drive meet system requirements. |
| SN74LVTH162244DGGR | 16-bit, 2-section, 3.3 V only; higher speed (tpd = 2.8 ns); LVTH CMOS input thresholds | Requires 3.3 V supply and level translation for 5 V+ systems; incompatible with wide-VDD operation | Choose SN74LVTH162244DGGR only for high-speed 3.3 V bus expansion with strict timing budgets. |
Compared with CD4050BM96 and SN74LVTH162244DGGR, the CD4503BEG4 uniquely delivers dual-gated 3-state control across a 3–18 V supply range - enabling selective bus partitioning in mixed-voltage industrial and defense platforms without external voltage translation or enable logic.
Availability
CD4503BEG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, automated test equipment signal routing, and military data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4503BEG4 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.
The CD4503BEG4 belongs to TI's legacy CD4000B series of high-voltage CMOS logic devices, designed specifically for robust, wide-supply-range digital interfacing in harsh-environment applications.
FAQ
What is the maximum capacitive load the CD4503BEG4 can drive while maintaining specified timing?
The CD4503BEG4 is characterized for operation with up to 50 pF capacitive load per output, delivering guaranteed propagation delay ≤70 ns at VDD = 15 V. Driving larger loads increases delay nonlinearly and may cause output ringing; for >50 pF, external series termination or buffer staging is recommended. The CD4503BEG4 datasheet specifies these limits under standard test conditions in Section 6.2.
Does the CD4503BEG4 support true bidirectional level shifting between 5 V and 12 V domains?
No - the CD4503BEG4 is a unidirectional noninverting buffer with CMOS inputs referenced to its own VDD. To interface 5 V logic to a 12 V bus, VDD must be set to 12 V and 5 V inputs must be ensured to meet VIH ≥ 0.7×12 V = 8.4 V, which they do not. External resistor dividers or dedicated level translators are required for safe cross-domain signaling. The CD4503BEG4 itself does not perform level translation.
Can both OE1 and OE2 inputs be tied together to function as a single enable for all six outputs?
Yes - OE1 (pins 1 & 2) and OE2 (pin 15) may be externally connected to a common control signal. When asserted low, all six outputs enter high-impedance state. This configuration is electrically valid and used in applications requiring global 3-state control, though it forfeits the CD4503BEG4's key advantage of independent group enable. The CD4503BEG4 internal structure supports this wiring without conflict.
Is the CD4503BEG4 RoHS compliant and lead-free?
Yes - the CD4503BEG4 uses NiPdAu (NIPDAU) lead finish and is RoHS compliant per TI's Packaging Information documentation. It meets EU Directive 2011/65/EU and has no intentionally added lead. The "G4" suffix denotes green (halogen-free, lead-free) packaging, confirmed in TI's 2026 Packaging Addendum for orderable part CD4503BEG4.
What is the minimum supply voltage required for reliable operation of the CD4503BEG4?
The CD4503BEG4 is specified to operate down to 3 V, with guaranteed logic thresholds (VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD) and output drive performance maintained across the full 3–18 V range. At 3 V, propagation delay increases to ≤150 ns and output current reduces to ±3.6 mA, but functionality remains intact. The CD4503BEG4 is not characterized below 3 V.
CD4503BEG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 2, 4 (Hex)
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 14.1mA, 23mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD4503BEG4 FAQ
1.How can I place an order for CD4503BEG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4503BEG4 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 CD4503BEG4 reliable?
The price and inventory of CD4503BEG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4503BEG4 is usually 5 days.
3.What payment methods are accepted for CD4503BEG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4503BEG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4503BEG4?
CD4503BEG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4503BEG4 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 CD4503BEG4?
For technical support, including CD4503BEG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4503BEG4 requirements.
6.How does Aetrix verify that CD4503BEG4 is sourced from the original manufacturer or authorized distributors?
All CD4503BEG4 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 CD4503BEG4 meets industry standards.
7.What is the process for return or replacement of CD4503BEG4?
All CD4503BEG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4503BEG4, 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 CD4503BEG4 part is unused and in its original packaging.
Return procedure for CD4503BEG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD4503BEG4 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
