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Texas Instruments SN75454BDR
- Part No.:
- SN75454BDR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN75454BDR.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,798
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Product details
Overview
SN75454BDR from Texas Instruments is a dual-peripheral NOR driver IC designed for high-current, high-speed switching in TTL-based systems. It delivers 300 mA per channel, supports up to 30 V output voltage, operates from 0°C to 70°C, features open-collector outputs with diode-clamped TTL-compatible inputs, and is used to drive lamps, LEDs, and high-voltage peripherals from microcontrollers or logic devices.
For engineers reviewing the SN75454BDR datasheet, SN75454BDR pinout, SN75454BDR application, or SN75454BDR equivalent, this page provides verified specifications, functional mode details, real-world use cases, and validated alternative parts for commercial-temperature peripheral driving applications.
Technical Context
The SN75454BDR implements dual independent NOR logic gates whose outputs directly drive NPN transistor stages with open-collector configuration. Each channel accepts two TTL-level inputs (1A/1B or 2A/2B) and produces a single active-low output (1Y/2Y) capable of sinking up to 300 mA at up to 30 V.
It is characterized for 0°C to 70°C operation, uses internal base resistors for simplified interfacing, and avoids latch-up even when conducting 300 mA at 20 V - a key reliability feature confirmed in test conditions per TI's SLRS021E specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | NOR gate per channel - output low only when both inputs are high; enables direct control of grounded loads. |
| Max Output Current | 300 mA per channel - sufficient to drive lamps, relays, or multiple LEDs without external amplification. |
| Output Voltage Range | Up to 30 V - allows interface with industrial 24 V systems and high-voltage peripherals. |
| Input Compatibility | TTL-compatible with diode-clamped inputs - ensures robust noise immunity and direct connection to 5 V logic families. |
| Propagation Delay | 27 ns typical (tPLH/tPHL @ 5 V, 25°C) - supports high-speed digital buffering and timing-critical peripheral enable/disable. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded and industrial control environments. |
| Supply Voltage | 4.75 V to 5.25 V - tightly regulated 5 V rail requirement ensures stable logic threshold and output saturation. |
Pinout & Package
SN75454BDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with standard gull-wing leads and RoHS-compliant NiPdAu plating. Thermal resistance RθJA is 122.2°C/W, requiring minimal heatsinking for continuous 300 mA operation at ambient temperatures ≤40°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A | Channel 1 & 2 Input A | TTL-level logic input; must be tied to VCC or GND if unused to prevent floating and undefined output state. |
| 1B, 2B | Channel 1 & 2 Input B | Second TTL-level logic input per channel; forms NOR function with corresponding A input. |
| 1Y, 2Y | Channel 1 & 2 Open-Collector Output | Sinks current to GND when active (low); requires external pull-up to load supply (e.g., 24 V) for high-voltage switching. |
| GND | Ground Reference | Common return path for logic inputs, output transistors, and bypass capacitor; must be low-impedance. |
| VCC | Supply Voltage | 5 V power rail; requires 0.1 µF ceramic bypass capacitor placed near the pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 20 V / 300 mA | Guaranteed safe operation under worst-case switching transients - eliminates need for external current-limiting or protection circuitry. |
| Diode-clamped TTL inputs | Internal clamping diodes absorb ESD and overvoltage spikes, enabling direct connection to unbuffered MCU GPIOs without external protection. |
| Open-collector outputs | Supports wired-OR logic, level translation, and flexible load interfacing - e.g., driving 24 V lamps from a 5 V controller. |
| High-speed switching (27 ns) | Enables precise timing control in strobe, PWM dimming, or multiplexed display applications where output transition time matters. |
| Standard 5 V supply | Eliminates need for auxiliary voltage rails - simplifies power architecture in cost-sensitive consumer and industrial designs. |
Applications
| LED Driver | Lamp Driver |
|---|---|
Use Scenario: Driving multiple high-brightness LEDs in signage or status indicators using a 5 V MCU with insufficient sink current. IC Role / Device Role / Timing Role: Dual-channel NOR driver acts as logic-controlled current sink - each channel independently enables/disables an LED string via active-low output. Use Value: Eliminates discrete transistor arrays; 300 mA per channel supports up to 10× 30 mA LEDs per output with simple series resistor design. | Use Scenario: Controlling 12–24 V incandescent or halogen indicator lamps in industrial HMI panels. IC Role / Device Role / Timing Role: Provides robust, TTL-compatible interface between low-voltage logic and high-voltage lamp loads - outputs switch lamps on/off via ground return path. Use Value: Withstands lamp inrush currents and eliminates relay wear; open-collector topology allows direct integration with existing 24 V supply rails. |
| Line Driver | Memory Driver |
Use Scenario: Buffering TTL-level address or control signals across PCB traces longer than 10 cm in noisy factory-floor equipment. IC Role / Device Role / Timing Role: Acts as high-current line driver - strengthens signal integrity by sourcing/sinking >10× standard TTL fan-out current. Use Value: Reduces rise/fall time degradation and improves noise margin; 27 ns propagation delay preserves timing margins in synchronous bus architectures. | Use Scenario: Enabling or disabling memory chip select (/CS) lines in legacy 5 V SRAM or EPROM subsystems. IC Role / Device Role / Timing Role: NOR logic combines two control signals (e.g., /EN and /ADDR_VALID) to generate precise /CS assertion windows. Use Value: Integrates gating logic and drive strength in one device - avoids adding discrete gates + transistors, saving board space and BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NOR driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75452BDR | NAND logic function instead of NOR; identical pinout, ratings, and package. | Requires inverted input logic to achieve same functional behavior; unsuitable where native NOR truth table is required. | Select only if system logic can accommodate NAND-based enable/disable sequencing. |
| ULN2003ADR | Seven Darlington drivers (not dual NOR); higher VCE(sat), lower speed (250 ns), no logic gating. | Used for simple high-current sinking without logic combination; lacks built-in NOR functionality. | Choose when multiple independent loads need sinking without input logic - not a functional replacement for NOR decision logic. |
Compared with SN75452BDR and ULN2003ADR, the SN75454BDR uniquely integrates NOR logic with 300 mA sink capability in an 8-pin SOIC, enabling compact, logic-aware peripheral control without external gates or level-shifting components.
Availability
SN75454BDR is available at Aetrix Electronics and suitable for LED drivers, lamp drivers, line drivers, and memory drivers requiring stable component supply in commercial-temperature industrial and embedded applications.
Supply support for SN75454BDR 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 and embedded processing solutions, with decades of expertise in logic, interface, and power management ICs.
The SN7545xB family was designed specifically for TTL-based peripheral interfacing - bridging low-voltage logic controllers and high-current/high-voltage loads while ensuring latch-up immunity and robust input protection.
FAQ
What logic function does the SN75454BDR implement?
The SN75454BDR implements a dual NOR gate function: each channel outputs a low signal only when both inputs (A and B) are high. This matches the positive-logic NOR truth table (Y = NOT(A+B)), and the open-collector outputs require external pull-ups to drive loads. The SN75454BDR is distinct from SN75451B (AND), SN75452B (NAND), and SN75453B (OR) in the same family.
Can the SN75454BDR drive a 24 V lamp directly?
Yes - the SN75454BDR supports up to 30 V off-state output voltage and can sink 300 mA continuously per channel. To drive a 24 V lamp, connect the lamp anode to +24 V and cathode to SN75454BDR's 1Y or 2Y pin; the IC sinks current to GND when enabled. Ensure the lamp's steady-state current stays ≤300 mA and include a flyback diode if inductive.
Does the SN75454BDR require external base resistors?
No - the SN75454BDR integrates internal base resistors (e.g., 1.6 kΩ and 4 kΩ per channel as shown in Figure 8-12) to bias the output NPN transistors. This eliminates the need for external components when interfacing with standard TTL logic, simplifying layout and reducing BOM count compared to discrete transistor solutions.
What is the maximum operating temperature of the SN75454BDR?
SN75454BDR is rated for operation from 0°C to 70°C - the commercial temperature range. It is not rated for extended industrial (–40°C to 85°C) or military (–55°C to 125°C) ranges. For wider temperature operation, consider the SN55454BJG (–55°C to 125°C, CDIP-8) or SNJ55454BFK (–55°C to 125°C, LCCC-20), both functionally identical but in different packages.
Is a bypass capacitor required for the SN75454BDR?
Yes - TI specifies a 0.1 µF ceramic capacitor between VCC and GND, placed as close as possible to the SN75454BDR's pins. This stabilizes the supply during fast output transitions, prevents coupling noise into logic inputs, and ensures reliable operation per the recommended layout in Figure 11-1 of the SLRS021E datasheet.
SN75454BDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Peripheral Driver
- Number of Elements:
- 2
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- 100µA, 300mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SN75454BDR FAQ
1.How can I place an order for SN75454BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75454BDR 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 SN75454BDR reliable?
The price and inventory of SN75454BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75454BDR is usually 5 days.
3.What payment methods are accepted for SN75454BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75454BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75454BDR?
SN75454BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75454BDR 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 SN75454BDR?
For technical support, including SN75454BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75454BDR requirements.
6.How does Aetrix verify that SN75454BDR is sourced from the original manufacturer or authorized distributors?
All SN75454BDR 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 SN75454BDR meets industry standards.
7.What is the process for return or replacement of SN75454BDR?
All SN75454BDR units undergo pre-shipment inspection (PSI). If there is an issue with SN75454BDR, 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 SN75454BDR part is unused and in its original packaging.
Return procedure for SN75454BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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