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Texas Instruments SN75451BPG4
- Part No.:
- SN75451BPG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
SN75451BPG4.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
SN75451BPG4 from Texas Instruments is a dual-peripheral AND driver IC designed for high-current, high-speed switching in TTL-based systems. It delivers 300mA output current per channel, supports up to 30V output voltage, features open-collector outputs with diode-clamped TTL-compatible inputs, and operates across 0°C to 70°C - commonly used to interface microcontrollers with lamps, LEDs, or relay loads.
For engineers reviewing the SN75451BPG4 datasheet, SN75451BPG4 pinout, SN75451BPG4 application, or SN75451BPG4 equivalent, key selection criteria include its AND logic function, 300mA continuous drive capability, 30V off-state output rating, open-collector topology requiring external pull-up, and compatibility with 5V TTL input levels.
Technical Context
The SN75451BPG4 integrates two independent AND-gate-driven NPN transistor output stages, each with internal base resistors and diode-clamped inputs for robust TTL interfacing. Its logic function (Y = A·B) enables active-low enabling of loads only when both inputs are high.
It uses open-collector outputs that require external pull-up resistors to define high-level voltage and load current path, supporting flexible voltage translation up to 30V on the output side while maintaining 5V TTL input compatibility and latch-up immunity at 20V/300mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | AND gate per channel (Y = A·B); enables load only when both inputs are high |
| Max Output Current | 300 mA continuous per channel - sufficient for driving relays, lamps, or LED arrays directly |
| Output Voltage Rating | 30 V off-state - allows direct interface with 24V industrial loads without level-shifting |
| Input Compatibility | TTL-compatible with diode-clamped inputs - accepts standard 5V logic thresholds (VIH ≥ 2V, VIL ≤ 0.8V) |
| Operating Temperature | 0°C to 70°C - commercial-grade specification suitable for office, consumer, and non-military embedded systems |
| Propagation Delay | 18–25 ns (typical at 5V/25°C) - supports high-speed digital control up to ~20 MHz toggle rates |
Pinout & Package
SN75451BPG4 is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 9.81 mm × 6.35 mm body size and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Channel 1 Logic Input A | First AND gate input; must be driven to valid TTL high/low to avoid floating state |
| 1B | Channel 1 Logic Input B | Second AND gate input; both 1A and 1B must be high to activate 1Y |
| 1Y | Channel 1 Open-Collector Output | Sinks current to GND when enabled; requires external pull-up resistor for logic high |
| GND | Ground Reference | Common return path for logic inputs and output emitter terminals |
| VCC | Supply Voltage | 5V nominal supply (4.75–5.25V range); powers internal logic and base drive circuitry |
| 2A | Channel 2 Logic Input A | Independent second AND gate input; functionally identical to 1A |
| 2B | Channel 2 Logic Input B | Independent second AND gate input; both 2A and 2B must be high to activate 2Y |
| 2Y | Channel 2 Open-Collector Output | Second independent sinking output; electrically isolated from 1Y but shares VCC and GND |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 20V/300mA | Ensures reliable operation under transient overvoltage or overload conditions without destructive failure |
| Diode-clamped TTL inputs | Prevents input voltage overshoot beyond VCC or undershoot below GND, simplifying ESD protection design |
| Open-collector outputs | Enables wired-OR logic, voltage-level translation, and direct connection to higher-voltage loads (up to 30V) |
| High-speed switching | Sub-30 ns propagation delay supports real-time control loops and fast peripheral enable/disable sequencing |
| Standard 5V supply | Direct compatibility with legacy TTL and modern 5V MCU I/O without level shifters or regulators |
Applications
| Lamp Driver | LED Driver |
|---|---|
Use Scenario: Driving incandescent or halogen indicator lamps in industrial control panels or test equipment. IC Role / Device Role / Timing Role: Dual-channel AND driver provides logic-controlled current sinking to ground the lamp filament. Use Value: Delivers 300mA per channel to drive lamps up to 24V without external transistors, reducing BOM count and board space. | Use Scenario: Controlling high-brightness LED strings in signage or status indicators. IC Role / Device Role / Timing Role: Acts as a logic-gated current sink for common-anode LED configurations. Use Value: Enables precise AND-gated activation of LEDs using standard 5V MCU outputs, with 30V output tolerance accommodating series LED stacks. |
| Relay Driver | Line Driver |
Use Scenario: Activating electromagnetic relays in PLC I/O modules or power distribution units. IC Role / Device Role / Timing Role: Sinks coil current for 5–24V DC relays, with AND logic ensuring safe dual-signal enable. Use Value: Eliminates need for discrete transistor drivers; built-in base resistors and latch-up immunity simplify robust relay interface design. | Use Scenario: Driving long PCB traces or cables carrying TTL-level signals in instrumentation backplanes. IC Role / Device Role / Timing Role: Buffers and strengthens weak logic signals before transmission over impedance-mismatched lines. Use Value: Provides 300mA drive strength and sub-30ns timing to maintain signal integrity and reduce rise/fall time degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual AND driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75451BD | Same functionality and specs, but in SOIC-8 package (surface-mount) | Requires rework for PCB layout; better thermal performance and smaller footprint | Select for automated assembly or space-constrained designs where through-hole is not required |
| SN75452BPG4 | NAND logic function instead of AND; otherwise identical electrical specs and pinout | Requires inverted input logic to achieve same load-enable behavior | Choose when system already uses NAND-based control architecture or needs complementary logic polarity |
Compared with SN75451BD and SN75452BPG4, the SN75451BPG4 offers through-hole PDIP packaging for prototyping and serviceability, and native AND logic eliminating external inverters - making it optimal for manual assembly and straightforward TTL-level load control.
Availability
SN75451BPG4 is available at Aetrix Electronics and suitable for lamp drivers, LED interfaces, relay control circuits, and line-driving applications requiring stable component supply and long-term industrial availability.
Supply support for SN75451BPG4 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The SN7545xB family was designed specifically for high-current, high-speed peripheral interfacing in TTL-based systems - bridging low-voltage logic controllers and higher-voltage, higher-power external loads with robust, latch-up-free operation.
FAQ
What logic function does the SN75451BPG4 implement?
The SN75451BPG4 implements a dual AND gate function: each channel's output (1Y or 2Y) goes low (active) only when both corresponding inputs (1A & 1B, or 2A & 2B) are high. This is confirmed in the device function table and logic diagram in the official TI datasheet. The SN75451BPG4 does not provide NAND, OR, or NOR functions - those are implemented by other members of the SN7545xB family such as SN75452BPG4 or SN75453BPG4.
Can the SN75451BPG4 drive a 24V relay coil directly?
Yes, the SN75451BPG4 can drive a 24V relay coil directly via its open-collector output, provided the coil current does not exceed 300mA and the relay's flyback voltage is clamped (e.g., with a reverse-biased diode across the coil). The SN75451BPG4 supports up to 30V off-state output voltage and is characterized for latch-up immunity at 20V/300mA, making it suitable for typical 24V DC relay applications when properly decoupled and protected.
Does the SN75451BPG4 require external pull-up resistors on its outputs?
Yes, the SN75451BPG4 has open-collector outputs and requires external pull-up resistors on both 1Y and 2Y pins to define the high logic level and complete the load current path. The value depends on load voltage and desired rise time - for 24V operation with moderate speed, a 10 kΩ resistor is typical. Without pull-ups, the outputs cannot assert a high state, and the SN75451BPG4 will only sink current, not source it.
What is the maximum operating temperature range for the SN75451BPG4?
SN75451BPG4 is rated for operation from 0°C to 70°C ambient temperature, as specified in the "Recommended Operating Conditions" section of the TI datasheet. This commercial-grade temperature range distinguishes it from the military-grade SN55451B variants, which operate from –55°C to 125°C. The SN75451BPG4's thermal characteristics (e.g., RθJA = 63.7°C/W for PDIP) assume proper PCB copper area and airflow within this range.
Is the SN75451BPG4 pin-compatible with other SN7545xB variants like SN75452BPG4?
Yes, all SN7545xB variants including SN75451BPG4, SN75452BPG4, SN75453BPG4, and SN75454BPG4 share identical 8-pin PDIP pinouts and electrical specifications - differing only in internal logic function (AND, NAND, OR, NOR). This allows drop-in replacement in the same footprint when logic requirements change, provided the new function aligns with system behavior. The SN75451BPG4 pin mapping is fully consistent across the family.
SN75451BPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
SN75451BPG4 FAQ
1.How can I place an order for SN75451BPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75451BPG4 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 SN75451BPG4 reliable?
The price and inventory of SN75451BPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75451BPG4 is usually 5 days.
3.What payment methods are accepted for SN75451BPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75451BPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75451BPG4?
SN75451BPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75451BPG4 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 SN75451BPG4?
For technical support, including SN75451BPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75451BPG4 requirements.
6.How does Aetrix verify that SN75451BPG4 is sourced from the original manufacturer or authorized distributors?
All SN75451BPG4 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 SN75451BPG4 meets industry standards.
7.What is the process for return or replacement of SN75451BPG4?
All SN75451BPG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN75451BPG4, 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 SN75451BPG4 part is unused and in its original packaging.
Return procedure for SN75451BPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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