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Texas Instruments SN75472P
- Part No.:
- SN75472P
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
SN75472P.pdf
- Description:
- IC PERIPHERAL DRIVER 5.25V 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:505
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Product details
Overview
SN75472P from Texas Instruments is a dual peripheral NAND driver IC in 8-pin PDIP package, designed for high-voltage (up to 70 V off-state), high-current (300 mA continuous) logic-level interfacing and power switching. It integrates TTL-compatible diode-clamped inputs and npn output transistors with internal base drive resistors, enabling direct driving of relays, lamps, MOSFET gates, and line loads in industrial control and legacy embedded systems.
For engineers reviewing the SN75472P datasheet, SN75472P pinout, SN75472P application, or SN75472P equivalent, this page delivers verified electrical specs, functional truth table, thermal derating data, real-world use cases, and two validated alternative parts - all specific to the SN75472P variant and its documented NAND logic function.
Technical Context
The SN75472P implements two independent NAND gates whose outputs drive npn transistor stages with built-in base resistors (1 kΩ, 1.6 kΩ, 130 Ω), eliminating external bias components. Each output supports up to 300 mA continuous collector current and withstands 55 V without latch-up after conduction.
It operates across 0°C to 70°C with 4.75–5.25 V supply, features TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V), and delivers low VOL (0.4 V at 100 mA; 0.7 V at 300 mA) and high VOH (>VS–18 mV under switching test conditions).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual 2-input NAND gate with open-collector npn output stage |
| Supply Voltage Range | 4.75 V to 5.25 V - matches standard TTL/5 V logic rails; not rated for 3.3 V operation |
| Output Current (Continuous) | 300 mA per channel - sufficient to drive 12 V/24 V relays, incandescent lamps, or small solenoids directly |
| Off-State Output Voltage | 70 V - enables safe switching of inductive loads with flyback voltages up to 70 V |
| Propagation Delay | 30–65 ns (tPLH/tPHL) - medium-speed switching suitable for <10 MHz digital control, not high-frequency PWM |
| Operating Temperature | 0°C to 70°C - commercial-grade rating; not qualified for extended industrial or automotive temperature ranges |
| Package Type | Plastic DIP (P), 8-pin - through-hole mounting with copper lead frame for improved thermal performance vs. standard plastic |
Pinout & Package
SN75472P uses an 8-pin PDIP (Plastic Dual In-line Package) with copper lead frame for enhanced thermal conductivity and reliability. Pin 1 is located at the top-left corner marked by a notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Input A of Channel 1 | TTL-compatible input; diode-clamped to GND and VCC for ESD protection and noise immunity |
| 1B | Input B of Channel 1 | Second NAND input; identical electrical characteristics to 1A |
| 1Y | Output Y of Channel 1 | Open-collector npn emitter-follower output; sinks current when active (low); requires external pull-up |
| GND | Ground Reference | Common return path for inputs, outputs, and internal bias networks; must be low-impedance |
| VCC | Positive Supply | 5 V nominal supply; powers internal logic and output transistor base drive circuitry |
| 2B | Input B of Channel 2 | Second NAND input of second channel; electrically isolated from Channel 1 |
| 2A | Input A of Channel 2 | First NAND input of second channel; identical to 1A/1B |
| 2Y | Output Y of Channel 2 | Independent open-collector output; shares same VCC/GND but no internal coupling with Channel 1 |
Key Features
| Feature | Design Value |
|---|---|
| No latch-up at 55 V | Guaranteed immunity to destructive latch-up when output is exposed to 55 V transient after conducting 300 mA |
| TTL-compatible inputs | Direct interface with 5 V TTL logic without level-shifting; VIH = 2 V, VIL = 0.8 V, IIH/IIL within TTL spec |
| Internal base drive resistors | Eliminates need for external base resistors on npn output transistors - simplifies PCB layout and BOM |
| High off-state voltage rating | 70 V maximum off-state output voltage allows safe switching of inductive loads with large back-EMF spikes |
| Copper lead frame package | PDIP (P) variant uses copper leads instead of iron-nickel, reducing thermal resistance and improving long-term reliability |
Applications
| Relay Driver Module | Lamp & LED Array Control |
|---|---|
|
Use Scenario: Driving 12 V DC electromagnetic relays in programmable logic controllers (PLCs) and industrial I/O modules. IC Role / Device Role / Timing Role: SN75472P acts as a logic-level translator and current amplifier, converting microcontroller GPIO signals into relay coil drive capability. Use Value: Enables direct drive of 12 V/24 V relays with up to 300 mA coil current while tolerating 70 V flyback voltage - eliminating need for external flyback diodes or Darlington arrays. |
Use Scenario: Controlling multiple incandescent indicator lamps or high-brightness LED strings in legacy instrumentation panels. IC Role / Device Role / Timing Role: SN75472P serves as a robust, low-cost lamp driver with built-in current limiting via saturation voltage and thermal design margin. Use Value: Delivers 300 mA per channel at low VOL (≤0.7 V), minimizing power loss and heat generation compared to discrete transistor solutions. |
| MOSFET Gate Driver | Memory & Bus Interface Buffer |
|
Use Scenario: Driving the gates of N-channel power MOSFETs in low-frequency (<100 kHz) DC-DC converters or motor control H-bridges. IC Role / Device Role / Timing Role: SN75472P provides fast-enough turn-on/turn-off (30–65 ns propagation delay) and sufficient peak current to charge/discharge gate capacitance. Use Value: Internal base resistors and TTL compatibility simplify gate drive design for medium-speed switching applications where dedicated gate drivers are overkill. |
Use Scenario: Buffering address/data lines between microprocessors and parallel memory devices (e.g., EPROM, SRAM) in retro-computing or embedded systems. IC Role / Device Role / Timing Role: SN75472P functions as a high-current, high-voltage bus driver with NAND logic for enable/control signal conditioning. Use Value: Supports 70 V off-state voltage and 300 mA sink current - ideal for driving memory chip select or output-enable lines with heavy capacitive loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NAND driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75472D | Same logic function and electrical specs, but in SOIC-8 package (surface-mount); lower thermal resistance than PDIP at board level | Preferred for space-constrained or automated assembly designs; not suitable for hand-soldered prototyping | Select SN75472D when PCB layout requires SMT and thermal management is handled via copper pour or heatsinking. |
| ULN2003A | 7-channel Darlington array with integrated flyback diodes; higher VCE(sat) (~1.1 V), slower switching (~250 ns), no logic gates | Better suited for high-inductance loads requiring built-in clamping; lacks NAND logic - requires upstream logic | Choose ULN2003A only when driving highly inductive loads (e.g., stepper motors) where integrated flyback protection outweighs speed and logic integration needs. |
Compared with SN75472D, the SN75472P offers easier manual assembly and better natural convection cooling in through-hole layouts; versus ULN2003A, it provides faster switching, lower saturation voltage, and integrated NAND logic - but requires external flyback protection for inductive loads.
Availability
SN75472P is available at Aetrix Electronics and suitable for industrial control systems, legacy equipment repair, and educational electronics projects requiring stable component supply and long-lifecycle support.
Supply support for SN75472P 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic products with broad industrial and automotive reach.
The SN7547x series was developed in the 1970s as high-voltage, high-current peripheral drivers for TTL-based systems - targeting relay, lamp, and MOSFET interface applications where standard logic ICs lacked output drive strength.
FAQ
What logic function does the SN75472P implement?
The SN75472P implements two independent 2-input NAND gates with open-collector npn output stages. Its truth table shows output Y = LOW only when both inputs A and B are HIGH; otherwise, Y is HIGH (open-collector, so external pull-up required). This matches standard positive-logic NAND behavior and is distinct from the AND function of SN75471P or OR function of SN75473P.
Can the SN75472P drive inductive loads like relays safely?
Yes - the SN75472P is characterized for no latch-up at 55 V after conducting 300 mA, and its off-state output voltage rating is 70 V. However, it does not include internal flyback diodes. For relay or solenoid use, an external flyback diode (e.g., 1N4004) must be connected across the load to clamp inductive kickback and protect the SN75472P output transistor.
What is the maximum continuous output current per channel of the SN75472P?
The SN75472P is characterized for 300 mA continuous collector current per channel at TA = 25°C. At 70°C ambient, derated power dissipation limits usable current - for the PDIP package, max power is 640 mW at 70°C, implying ~2.1 V saturation drop at 300 mA yields ~0.63 W, staying within limit. Always verify thermal design with actual PCB copper area and airflow.
Is the SN75472P compatible with 3.3 V logic inputs?
No - the SN75472P is TTL-compatible and specified for 5 V operation only. Its input thresholds (VIH = 2 V min, VIL = 0.8 V max) and internal diode clamps assume a 5 V VCC rail. Driving it with 3.3 V logic may result in marginal or unreliable HIGH recognition; a level shifter or buffer (e.g., SN74LVC244) is required for 3.3 V MCU interfaces.
How does the SN75472P differ from the SN75471P and SN75473P?
The SN75472P implements NAND logic, whereas SN75471P is dual AND and SN75473P is dual OR - all share identical pinout, package, voltage/current ratings, and thermal specs. Their internal resistor networks differ to match respective logic functions, resulting in slightly different supply currents (e.g., ICCL = 61–76 mA for SN75472P vs. 52–65 mA for SN75471P).
SN75472P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Peripheral Driver
- Number of Elements:
- 2
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -, 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
SN75472P FAQ
1.How can I place an order for SN75472P through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75472P 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 SN75472P reliable?
The price and inventory of SN75472P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75472P is usually 5 days.
3.What payment methods are accepted for SN75472P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75472P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75472P?
SN75472P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75472P 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 SN75472P?
For technical support, including SN75472P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75472P requirements.
6.How does Aetrix verify that SN75472P is sourced from the original manufacturer or authorized distributors?
All SN75472P 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 SN75472P meets industry standards.
7.What is the process for return or replacement of SN75472P?
All SN75472P units undergo pre-shipment inspection (PSI). If there is an issue with SN75472P, 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 SN75472P part is unused and in its original packaging.
Return procedure for SN75472P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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