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Texas Instruments SN75454BD
- Part No.:
- SN75454BD
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN75454BD.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
SN75454BD from Texas Instruments is a dual-peripheral NOR driver IC designed for high-current, high-speed switching in TTL-based systems. It delivers 300mA output current per channel, supports up to 30V off-state output voltage, operates over 0°C to 70°C, and features open-collector outputs with diode-clamped TTL-compatible inputs - used to drive lamps, LEDs, and high-voltage peripherals from microcontrollers.
For engineers reviewing the SN75454BD datasheet, SN75454BD pinout, SN75454BD application, or SN75454BD equivalent, this page provides verified functional mode tables, thermal derating data, latch-up immunity confirmation (20V/300mA), propagation delay specs (tPLH/tPHL ≤35 ns), and SOIC-8 package layout guidance for industrial buffer and peripheral driver designs.
Technical Context
The SN75454BD implements dual independent NOR logic gates whose outputs directly drive NPN transistor stages with internal base resistors. Each channel's output is open-collector, requiring external pull-up to VS (up to 30V), enabling level-shifting between 5V logic and higher-voltage loads.
It uses diode-clamped inputs to suppress negative transients and ensure robust TTL interfacing without external protection. The device avoids latch-up under 20V/300mA stress conditions and maintains stable operation across its full commercial temperature range (0°C to 70°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual NOR gate with internally connected outputs to NPN drivers - enables active-low load control per channel |
| Max Output Current | 300 mA per channel - sufficient to drive lamps, relays, or LED arrays without external amplification |
| Off-State Output Voltage | 30 V - allows direct interface to 24V industrial loads without level-shifting circuitry |
| Propagation Delay | ≤35 ns at VCC = 5 V, TA = 25°C - supports high-speed digital buffering up to ~10 MHz |
| Supply Voltage Range | 4.75 V to 5.25 V - tightly regulated 5V TTL compatibility with low supply sensitivity |
| Input Compatibility | TTL-level diode-clamped inputs - accepts standard 0.8V/2.0V VIH/VIL thresholds without external biasing |
| Thermal Resistance | RθJA = 122.2°C/W (SOIC-8) - requires minimal heatsinking for continuous 300mA operation at ambient ≤50°C |
Pinout & Package
SN75454BD 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 (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A | Channel 1 & 2 Input A | First logic input per NOR gate - must be tied to GND or VCC if unused to prevent floating states |
| 1B, 2B | Channel 1 & 2 Input B | Second logic input per NOR gate - determines active-low output assertion (Y = NOT(A+B)) |
| 1Y, 2Y | Channel 1 & 2 Open-Collector Output | Sinks current to GND when asserted - requires external pull-up to VS (up to 30V) for load driving |
| GND | Ground Reference | Common return path for logic inputs, supply, and output current - must be low-impedance |
| VCC | Positive Supply | 5V TTL supply input - bypassed with 0.1 µF capacitor near pin to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 20V/300mA | Guarantees safe operation during transient overvoltage or overload events without destructive failure |
| Diode-clamped TTL inputs | Eliminates need for external clamping diodes or current-limiting resistors on logic lines |
| Open-collector outputs | Enables wired-OR logic, mixed-voltage interfacing, and direct connection to loads up to 30V |
| High-speed switching (≤35 ns) | Supports clean edge transitions in timing-critical buffers and address/data line drivers |
| Standard 5V supply compatibility | Integrates seamlessly into legacy TTL and mixed-logic systems without voltage translation |
Applications
| LED Driver | Lamp Driver |
|---|---|
Use Scenario: Driving multiple high-brightness LEDs from a 5V microcontroller GPIO bank with shared 24V rail. IC Role / Device Role / Timing Role: Dual-channel active-low switch translating TTL logic to 24V LED current paths. Use Value: Eliminates discrete transistor arrays; each channel delivers 300mA continuously, supporting parallel LED strings without thermal derating. | Use Scenario: Controlling incandescent indicator lamps in industrial HMI panels powered from 12–24V supplies. IC Role / Device Role / Timing Role: High-current NOR gate buffer isolating MCU outputs from inrush-sensitive lamp loads. Use Value: Withstands 300mA steady-state and >500mA peak surge (10ms), preventing contact welding in mechanical relay replacement designs. |
| Line Driver | Memory Driver |
Use Scenario: Buffering TTL-level address or control signals across backplane traces to remote I/O modules. IC Role / Device Role / Timing Role: High-speed, noise-immune line driver with open-collector outputs for bus termination flexibility. Use Value: 35ns propagation delay ensures setup/hold timing margins at 10MHz bus rates; diode-clamped inputs reject EFT bursts per IEC 61000-4-4. | Use Scenario: Driving word-line or chip-select signals in small-footprint SRAM or EPROM subsystems. IC Role / Device Role / Timing Role: Dual NOR gate providing active-low enable logic with integrated current gain for memory array selection. Use Value: Reduces component count vs. discrete gate + transistor solutions; guaranteed 0.5V VOL at 300mA ensures reliable low-level recognition by memory devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-NOR peripheral driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75452BD | NAND logic function instead of NOR; identical pinout, SOIC-8 package, and electrical specs | Requires inverted input signals to achieve same load activation behavior as SN75454BD | Select when system logic naturally provides NAND-compatible control signals or when redesigning input staging |
| ULN2003A | Seven Darlington drivers (not logic-gated); higher saturation voltage (VCE(sat) ≈ 1.3V), lower max speed (~1µs), no logic inputs | Used for simple open-collector sinking without logic evaluation - no built-in NOR functionality | Choose for pure high-current sinking where logic gating is handled upstream; not a functional substitute for NOR decision logic |
Compared with SN75452BD and ULN2003A, SN75454BD uniquely integrates dual NOR logic with 300mA open-collector drivers in SOIC-8, enabling compact, self-contained load control decisions without external gates or level shifters - critical for space-constrained industrial I/O modules.
Availability
SN75454BD is available at Aetrix Electronics and suitable for industrial HMI, embedded lighting control, backplane signal buffering, and memory subsystem design requiring stable component supply and long-term manufacturability.
Supply support for SN75454BD 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 logic solutions for industrial, automotive, and communications markets.
The SN7545xB family was developed to replace legacy SN75450-series peripheral drivers with enhanced latch-up immunity and tighter parametric control - targeting TTL-based industrial control, instrumentation, and legacy system upgrades.
FAQ
What logic function does SN75454BD implement?
SN75454BD implements two independent NOR gates (positive logic: Y = NOT(A+B)), with each output driving an open-collector NPN transistor stage. When both inputs to a channel are low, the corresponding output sinks current; any high input forces the output high-impedance. This behavior is confirmed in Table 8-4 and Figures 8-4 and 8-8 of the official datasheet.
Can SN75454BD drive a 24V lamp directly?
Yes, SN75454BD can drive a 24V lamp directly using its open-collector outputs. Connect the lamp between VS (24V) and 1Y or 2Y, with GND completing the path. The device supports up to 30V off-state output voltage and 300mA continuous sink current per channel, making it suitable for incandescent and resistive lamps within those limits - as validated in Absolute Maximum Ratings and Figure 9-1.
Does SN75454BD require external pull-up resistors?
Yes, SN75454BD requires external pull-up resistors on pins 1Y and 2Y because its outputs are open-collector. The resistor value depends on load voltage (VS) and desired rise time; for 24V operation with moderate speed, a 4.7kΩ resistor is typical. This requirement is inherent to the open-collector architecture and explicitly shown in all application schematics including Figure 9-1 and Figure 8-9 through 8-12.
What is the maximum operating temperature for SN75454BD?
The maximum operating free-air temperature for SN75454BD is 70°C, as specified in the "Operating free-air temperature" row of Section 6.2 Recommended Operating Conditions. This distinguishes it from the military-grade SN55454B variant (–55°C to 125°C) and confirms its commercial-grade qualification - consistent across Device Comparison Table and Description sections.
Is SN75454BD pin-compatible with SN75451BD?
Yes, SN75454BD is pin-compatible with SN75451BD, SN75452BD, and SN75453BD - all share identical SOIC-8 (D) package, pin configuration (Figure 5-1), and pin functions (Table 5-1). Only the internal logic differs (AND/NAND/OR/NOR), allowing drop-in replacement when logic function matches system requirements - confirmed in Device Comparison Table and Pin Configuration section.
SN75454BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
SN75454BD FAQ
1.How can I place an order for SN75454BD through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75454BD 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 SN75454BD reliable?
The price and inventory of SN75454BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75454BD is usually 5 days.
3.What payment methods are accepted for SN75454BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75454BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75454BD?
SN75454BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75454BD 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 SN75454BD?
For technical support, including SN75454BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75454BD requirements.
6.How does Aetrix verify that SN75454BD is sourced from the original manufacturer or authorized distributors?
All SN75454BD 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 SN75454BD meets industry standards.
7.What is the process for return or replacement of SN75454BD?
All SN75454BD units undergo pre-shipment inspection (PSI). If there is an issue with SN75454BD, 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 SN75454BD part is unused and in its original packaging.
Return procedure for SN75454BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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