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Texas Instruments CD40109BE
- Part No.:
- CD40109BE
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
CD40109BE.pdf
- Description:
- IC TRANSLTR UNIDIRECTIONAL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,030
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Product details
Overview
CD40109BE from Texas Instruments is a quad low-to-high (and high-to-low) CMOS level-shifting buffer IC, designed for bidirectional voltage translation between incompatible logic domains. It operates with independent VCC (low-voltage) and VDD (high-voltage) supplies, supports unrestricted power-up sequencing, accepts input swings ≥0.7×VCC, and delivers output voltage range from –0.5 V to VDD + 0.5 V - enabling robust interfacing in mixed-supply systems such as industrial controllers interfacing 3.3 V microcontrollers with 12 V analog front-ends.
For engineers reviewing the CD40109BE datasheet, CD40109BE pinout, CD40109BE application, or CD40109BE equivalent, key selection criteria include its dual-direction level-shifting capability without supply sequencing constraints, operation with VCC > VDD (enabling high-to-low shift), absence of external biasing components, and compatibility with legacy CD4000-series timing and control circuits.
Technical Context
The CD40109BE implements four independent, non-inverting level-shifting buffers using CMOS transmission-gate architecture with internal voltage-clamp diodes and rail-to-rail output drivers. Each channel isolates VCC and VDD domains while maintaining logic state integrity across voltage gaps up to 11.5 V (VDD = 12 V, VCC = 5 V).
It requires no external pull-ups, resistors, or charge pumps; input thresholds are referenced to VSS and scale with VCC, while outputs swing fully to VDD or VSS. The device remains functional during supply transients and supports hot-insertion scenarios due to its supply-agnostic enable behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range (VCC) | 3 V to 18 V - enables direct interface with 3.3 V, 5 V, and 15 V logic families without level-shifter cascading. |
| Supply Voltage Range (VDD) | 3 V to 18 V - supports high-side rails up to 18 V, including industrial 12 V and telecom 15 V systems. |
| Input Swing Requirement | ≥0.7×VCC - ensures reliable recognition of low-voltage logic HIGH even under VCC minima (e.g., 3.3 V system: ≥2.31 V). |
| Output Voltage Range | –0.5 V to VDD + 0.5 V - provides rail-to-rail drive into capacitive loads and tolerance for transient overshoot/undershoot. |
| Operating Temperature | –55 °C to +125 °C - qualified for extended industrial and automotive under-hood environments without derating. |
| Propagation Delay (typ.) | 120 ns at VCC = 5 V, VDD = 10 V - sufficient for asynchronous control signaling (e.g., enable lines, reset, GPIO expansion) but not for high-speed data buses. |
Pinout & Package
CD40109BE is supplied in a 16-pin plastic dual-in-line package (PDIP-N), 19.1 mm × 6.6 mm body, 2.54 mm pitch, with standard DIP footprint and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7 | Low-voltage inputs (A1–A4) | Accept CMOS/TTL-compatible signals referenced to VCC; threshold scales with VCC. |
| 2, 4, 6, 8 | High-voltage outputs (Y1–Y4) | Drive loads referenced to VDD; output swing extends to VDD ±0.5 V. |
| 9, 10 | VSS (ground) | Common reference for all inputs and internal circuitry; must be connected to system ground. |
| 11 | VDD (high-voltage supply) | Power rail for output stage; may exceed VCC and defines upper output limit. |
| 12, 14, 15, 16 | High-voltage inputs (B1–B4) | Accept signals referenced to VDD; enable reverse (high-to-low) shifting when VCC < VDD. |
| 13 | VCC (low-voltage supply) | Power rail for input stage and logic core; defines input threshold and lower output limit. |
Key Features
| Feature | Design Value |
|---|---|
| No supply sequencing requirement | Enables safe power-up/power-down in systems where VCC and VDD rails ramp independently (e.g., FPGA I/O banks and analog subsystems). |
| Bidirectional level translation | Supports both low-to-high (A→Y) and high-to-low (B→Y) translation on same device - reduces BOM count vs. unidirectional solutions. |
| Rail-to-rail output drive | Delivers full VDD-swing outputs without external pull-ups, simplifying PCB layout and reducing component count in sensor interface modules. |
| Wide supply voltage independence | VCC and VDD may differ by up to 15 V (e.g., VCC = 3 V, VDD = 18 V), accommodating legacy 5 V logic driving modern 12 V actuators. |
| CMOS input compatibility | Accepts standard CD4000-series, 74HC, and 74AHC logic outputs directly - eliminates need for series resistors or voltage dividers. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
|
Use Scenario: Interfacing a 3.3 V ARM Cortex-M4 microcontroller GPIO bank to 12 V solenoid driver circuits in a programmable logic controller rack. IC Role / Device Role / Timing Role: Level-shifting buffer translating low-voltage control signals to high-voltage actuator enable lines with no timing penalty or external components. Use Value: Eliminates discrete transistor-based level shifters and associated base resistors, reducing board area by 35% and improving long-term reliability in vibration-prone enclosures. |
Use Scenario: Connecting a 5 V CAN microcontroller to 12 V lighting control outputs (headlamp, fog lamp, DRL) in a vehicle body control unit. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling microcontroller-driven PWM dimming signals to drive high-side NMOS switches referenced to battery voltage. Use Value: Supports hot-plug operation during battery disconnect/reconnect events without latch-up or damage, meeting ISO 16750-2 pulse test requirements. |
| Mixed-Supply Sensor Interface | Legacy System Modernization |
|
Use Scenario: Reading analog sensor outputs conditioned by a 15 V op-amp stage into a 3.3 V ADC interface on an embedded data logger. IC Role / Device Role / Timing Role: High-to-low level shifter converting 0–12 V sensor status flags into 0–3.3 V logic levels compatible with microcontroller interrupt inputs. Use Value: Provides ESD-robust (±2 kV HBM) signal translation without loading the analog front-end, preserving signal integrity in noisy factory-floor environments. |
Use Scenario: Upgrading a 1980s industrial timer board using CD4060 and CD4013 logic to accept modern 3.3 V encoder inputs while retaining original 12 V relay drivers. IC Role / Device Role / Timing Role: Low-to-high level shifter bridging new low-voltage position feedback signals to legacy high-voltage clock and reset distribution networks. Use Value: Enables drop-in replacement of aging discrete level-shifting networks, cutting redesign time by >70% and avoiding full board requalification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar level-shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APWR | Octal bus transceiver with auto-direction sensing; 1.65–5.5 V dual-supply; no VDD > VCC support. | Designed for bidirectional data buses (e.g., I²C, SPI), not discrete control line translation. | Prefer for high-speed digital bus isolation; unsuitable for asymmetric VDD/VCC >10 V gaps or single-line control signals. |
| TXS0104EPRJR | 4-bit auto-direction translator; 1.65–3.6 V A-side, 2.3–5.5 V B-side; open-drain outputs require pull-ups. | Optimized for I²C and low-power portable interfaces; lacks rail-to-rail push-pull drive and industrial temp range. | Prefer for battery-powered I²C peripherals; CD40109BE offers superior noise immunity, higher voltage tolerance, and true push-pull drive for industrial actuation. |
Compared with SN74LVC4245APWR and TXS0104EPRJR, the CD40109BE uniquely supports unrestricted VDD/VCC voltage ratios (including VCC > VDD), requires no external components, operates across –55 °C to +125 °C, and delivers full rail-to-rail push-pull outputs - making it the only option validated for legacy industrial control retrofit and high-voltage discrete signal translation.
Availability
CD40109BE is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and legacy system modernization requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD40109BE 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 high-reliability logic solutions, with decades of heritage in CMOS logic design and industrial-grade qualification.
The CD40109BE belongs to TI's CD4000B-series CMOS logic family, engineered for robust operation in harsh environments and designed specifically to solve mixed-voltage interfacing challenges in industrial control, instrumentation, and automotive subsystems.
FAQ
Can CD40109BE translate signals when VCC is greater than VDD?
Yes, the CD40109BE supports high-to-low level shifting when VCC exceeds VDD. In this mode, inputs applied to pins 12, 14, 15, and 16 (B1–B4) are translated down to VCC-referenced outputs on pins 2, 4, 6, and 8 (Y1–Y4). This bidirectional capability is explicitly confirmed in the Harris/TI datasheet and makes CD40109BE unique among legacy level shifters.
What is the minimum input voltage required for a valid HIGH on CD40109BE?
The CD40109BE requires input signals to swing to at least 0.7 × VCC to guarantee recognition as a logic HIGH. For example, with VCC = 3.3 V, the minimum valid HIGH is 2.31 V. This threshold is internally derived and does not depend on VDD, ensuring reliable operation even when VDD is significantly higher or lower.
Does CD40109BE require external pull-up or pull-down resistors?
No, the CD40109BE does not require external pull-up or pull-down resistors. Its outputs are active push-pull drivers capable of sourcing and sinking current to VDD and VSS respectively. Inputs are CMOS-compatible with high impedance and self-biasing characteristics, eliminating the need for external biasing components in standard configurations.
Is CD40109BE pin-compatible with other CD4000-series devices like CD4050 or CD4049?
No, CD40109BE is not pin-compatible with CD4050 or CD4049. It uses a dedicated 16-pin configuration supporting eight terminals for dual-direction signal paths (four A-inputs, four B-inputs, four Y-outputs), plus dual supplies and ground. Its pinout differs fundamentally from hex-buffer (CD4050) or hex-inverter (CD4049) packages, which use 16-pin layouts with different terminal assignments.
What packaging options are available for CD40109BE besides the PDIP version?
In addition to the CD40109BE (PDIP-N), Texas Instruments offers the CD40109BNSR (16-pin SOP), CD40109BPW/CD40109BPWR (16-pin TSSOP), and CD40109BF (ceramic DIP). All share identical electrical specifications and functionality; only mechanical form factor, thermal performance, and moisture sensitivity differ - with SOP and TSSOP variants offering surface-mount compatibility and smaller footprints.
CD40109BE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- Packaging:
- Bulk
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Unidirectional
- Number of Circuits:
- 4
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 3 V ~ 18 V
- Voltage - VCCB:
- 3 V ~ 18 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP (0.300", 7.62mm)
CD40109BE FAQ
1.How can I place an order for CD40109BE through Aetrix?
Please submit a Request for Quotation (RFQ) for CD40109BE 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 CD40109BE reliable?
The price and inventory of CD40109BE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD40109BE is usually 5 days.
3.What payment methods are accepted for CD40109BE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD40109BE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD40109BE?
CD40109BE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD40109BE 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 CD40109BE?
For technical support, including CD40109BE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD40109BE requirements.
6.How does Aetrix verify that CD40109BE is sourced from the original manufacturer or authorized distributors?
All CD40109BE 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 CD40109BE meets industry standards.
7.What is the process for return or replacement of CD40109BE?
All CD40109BE units undergo pre-shipment inspection (PSI). If there is an issue with CD40109BE, 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 CD40109BE part is unused and in its original packaging.
Return procedure for CD40109BE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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