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Texas Instruments SN75453BPS
- Part No.:
- SN75453BPS
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN75453BPS.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:4,668
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Product details
Overview
SN75453BPS from Texas Instruments is a dual OR-gate peripheral 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 low-power logic sources.
For engineers reviewing the SN75453BPS datasheet, SN75453BPS pinout, SN75453BPS application, or SN75453BPS equivalent, this page provides verified functional identity, confirmed SO package mapping, validated 8-pin terminal roles, temperature-rated performance data, and real-world design context for industrial buffer and power interface use cases.
Technical Context
The SN75453BPS implements dual positive-logic OR gates whose outputs directly drive NPN transistor bases, enabling active-low open-collector switching. Each channel accepts TTL-level inputs (VIH ≥ 2 V, VIL ≤ 0.8 V) and sinks up to 300 mA with VOH = VS – 6.5 V at 300 mA load.
Its internal structure includes integrated base resistors (1 kΩ, 4 kΩ, 1.6 kΩ), emitter degeneration, and diode clamping to suppress input transients. The device avoids latch-up under 20 V/300 mA stress and exhibits propagation delays of 18–25 ns (tPLH/tPHL) at 5 V/25°C with 15 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual OR gate (positive logic: Y = A + B) |
| Max Output Current | 300 mA per channel - sufficient to drive lamps, relays, or LED strings without external amplification |
| Output Voltage Range | Up to 30 V - enables direct interface with 24 V industrial loads |
| Supply Voltage | 4.75 V to 5.25 V - tightly regulated 5 V TTL compatibility with margin for rail droop |
| Propagation Delay | 18–25 ns - supports >20 MHz digital switching in buffered control paths |
| Operating Temperature | 0°C to 70°C - commercial-grade thermal envelope for embedded and instrumentation applications |
| Input Compatibility | TTL diode-clamped - eliminates need for external clamping diodes or pull-ups |
Pinout & Package
SN75453BPS is housed in an 8-pin Small Outline (SO) package measuring 6.20 mm × 5.30 mm, with standard gull-wing leads and RoHS-compliant NiPdAu finish (Level-1-260°C reflow rating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Channel 1 Logic Input A | TTL-compatible input; must be terminated to GND or VCC if unused to prevent floating |
| 1B | Channel 1 Logic Input B | Second OR input for Channel 1; diode-clamped for transient suppression |
| 1Y | Channel 1 Open-Collector Output | Sinks current to GND when A OR B = HIGH; requires external pull-up to load supply |
| GND | Ground Reference | Common return path for logic and output current; must be low-impedance |
| VCC | Positive Supply | 5 V logic supply; requires 0.1 µF bypass capacitor near pin |
| 2A | Channel 2 Logic Input A | Independent OR input for second channel; electrically isolated from Channel 1 |
| 2B | Channel 2 Logic Input B | Second OR input for Channel 2; shares same input structure as 1A/1B |
| 2Y | Channel 2 Open-Collector Output | Independent sink output; supports separate high-voltage load control |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 20 V/300 mA | Guarantees robust operation during inductive load switching without destructive failure |
| Diode-clamped TTL inputs | Eliminates need for external input protection components in noisy industrial environments |
| Open-collector outputs | Enables wired-OR logic, level translation, and direct connection to higher-voltage rails (up to 30 V) |
| High-speed switching (18–25 ns) | Supports fast digital control loops and pulse-width modulated peripheral driving |
| Internal base resistors | Reduces external component count by integrating 1 kΩ, 4 kΩ, and 1.6 kΩ biasing network |
Applications
| Lamp Driver | LED Driver |
|---|---|
Use Scenario: Driving incandescent or halogen indicator lamps in industrial HMI panels requiring 12–24 V and 100–300 mA. IC Role / Device Role / Timing Role: Dual-channel OR-gate driver providing TTL-to-high-voltage interface with independent on/off control per lamp. Use Value: Eliminates discrete transistor arrays while maintaining fast turn-on/turn-off response and latch-up immunity during lamp inrush. | Use Scenario: Controlling high-brightness LED strings in signage or status indicators powered from 5–24 V supplies. IC Role / Device Role / Timing Role: Open-collector sink driver enabling constant-current LED operation via external resistor or current-source configuration. Use Value: Delivers precise 300 mA per channel without thermal derating at 70°C ambient, supporting compact LED module designs. |
| Line Driver | Memory Driver |
Use Scenario: Buffering TTL-level address/data lines to drive long PCB traces or backplane stubs with capacitive loads up to 15 pF. IC Role / Device Role / Timing Role: High-speed logic buffer with controlled edge rates (5–8 ns transition time) minimizing signal integrity degradation. Use Value: Maintains signal fidelity at >20 MHz clock rates while sourcing/sinking 300 mA peak current into trace capacitance. | Use Scenario: Enabling/disabling memory chip select (CS) or output enable (OE) signals in microcontroller-based data loggers. IC Role / Device Role / Timing Role: Dual OR gate generating composite enable signals from multiple address decode conditions. Use Value: Reduces gate count vs. discrete logic; ensures sub-25 ns propagation delay for synchronous memory access timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual OR-gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75453BD | Same logic function and electrical specs; SOIC-8 package (4.90 mm × 3.90 mm), lower thermal resistance (RθJA = 122.2°C/W vs. 119.6°C/W) | Preferred for space-constrained PCBs where footprint reduction outweighs minor thermal trade-off | Select SN75453BD for automated assembly and tighter board layouts; SN75453BPS remains optimal for legacy SO footprints or thermal margin-critical designs |
| SN75451BPS | AND-gate logic instead of OR; identical package, pinout, and all electrical ratings except truth table | Used where active-HIGH enable logic is required instead of active-LOW OR behavior | Choose SN75451BPS only when system logic demands AND functionality; not interchangeable without firmware/hardware revision |
Compared with SN75453BD and SN75451BPS, the SN75453BPS offers identical OR-gate functionality in a slightly larger SO package with marginally better thermal performance, making it suitable for thermally demanding but footprint-flexible applications where OR logic is mandatory.
Availability
SN75453BPS is available at Aetrix Electronics and suitable for lamp drivers, LED interfaces, and line buffering applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed commercial-temperature-grade reliability.
Supply support for SN75453BPS 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 engineered to replace legacy SN75450-series drivers with enhanced latch-up immunity and consistent high-speed performance, targeting TTL-based peripheral interfacing in cost-sensitive industrial controls and instrumentation.
FAQ
What logic function does the SN75453BPS implement?
The SN75453BPS implements two independent positive-logic OR gates (Y = A + B). When either input A or B is HIGH (≥2 V), the corresponding open-collector output sinks current to ground. Both inputs LOW results in high-impedance output state. This behavior is confirmed in Table 8-3 and Figure 8-7 of the official TI datasheet SLRS021E.
Can SN75453BPS drive a 24 V relay coil directly?
Yes, SN75453BPS can drive a 24 V relay coil directly using its open-collector output configured with an external pull-up to 24 V. Each channel supports up to 300 mA continuous sink current and withstands off-state voltages up to 30 V. Ensure the relay coil current stays within 300 mA and include a flyback diode across the coil to protect the SN75453BPS output transistor.
What is the maximum operating temperature for SN75453BPS?
The SN75453BPS is characterized for operation from 0°C to 70°C ambient temperature, as specified in the "Device Comparison Table" and Section 6.2 of the TI datasheet. This commercial-grade temperature range applies specifically to all SN7545xB variants, distinguishing them from the military-grade SN5545xB series rated from –55°C to 125°C.
Does SN75453BPS require external base resistors?
No, SN75453BPS does not require external base resistors. Its internal schematic (Figure 8-11) integrates 1 kΩ, 4 kΩ, and 1.6 kΩ resistors to bias the NPN output transistors. This eliminates external components and ensures stable switching across temperature and process variations, as documented in the "Detailed Description" section of the datasheet.
Is SN75453BPS pin-compatible with SN75451BPS?
Yes, SN75453BPS is pin-compatible with SN75451BPS: both use the same SO-8 (PS) package, identical pin numbering (1A, 1B, 1Y, GND, VCC, 2B, 2A, 2Y), and share identical absolute maximum ratings, recommended operating conditions, and thermal metrics. Only the logic function differs (OR vs. AND), so hardware replacement is physically possible but requires functional verification in the target circuit.
SN75453BPS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-SO
SN75453BPS FAQ
1.How can I place an order for SN75453BPS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75453BPS 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 SN75453BPS reliable?
The price and inventory of SN75453BPS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75453BPS is usually 5 days.
3.What payment methods are accepted for SN75453BPS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75453BPS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75453BPS?
SN75453BPS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75453BPS 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 SN75453BPS?
For technical support, including SN75453BPS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75453BPS requirements.
6.How does Aetrix verify that SN75453BPS is sourced from the original manufacturer or authorized distributors?
All SN75453BPS 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 SN75453BPS meets industry standards.
7.What is the process for return or replacement of SN75453BPS?
All SN75453BPS units undergo pre-shipment inspection (PSI). If there is an issue with SN75453BPS, 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 SN75453BPS part is unused and in its original packaging.
Return procedure for SN75453BPS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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