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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Diodes Incorporated PT8A977BPE

Name: PT8A977BPE
Brand: Diodes Incorporated
SKU: PT8A977BPE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT8A977BPE

Manufacturer:: Diodes Incorporated

Category:: Motor Drivers, Controllers

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: PT8A977BPE.pdf

Description:: IC MOTOR DRIVER 1.8V-5V

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PT8A977BPE from Pericom Semiconductor is a 5-function infrared/RF remote control encoder IC with on-chip oscillator, auto-power-off, wake-on-button functionality, and dedicated power-control output (PC pin). It operates from 1.8V to 5.0V, delivers encoded function codes on SO (carrier-less) and SC (carrier-modulated) outputs, and targets battery-powered remote-controlled toys requiring low standby current (5 µA) and minimal external components.

For engineers reviewing the PT8A977BPE datasheet, PT8A977BPE pinout, PT8A977BPE application, or PT8A977BPE equivalent, this page provides verified pin functions, oscillator tuning via external resistor, PC-driven external power gating, and functional pairing requirements with PT8A978B/978BL decoders for reliable 5-action remote control systems.

Technical Context

The PT8A977BPE implements a digital encoding architecture that maps five mechanical button inputs (Forward, Backward, Left, Right, Turbo) to time-encoded serial data frames transmitted on SO and SC pins. Its internal oscillator - adjustable via external resistor (typ. 200 kΩ) - generates 102–154 kHz base frequency, with ±25% matching tolerance required versus companion decoder oscillators.

Auto-power-off is managed by an internal counter that disables oscillator and output drivers after button inactivity; any input press immediately wakes the device. The PC pin provides active-low open-drain output capable of controlling external LDO or load switch, enabling full-system power gating in ultra-low-power remote transmitters.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	1.8 V to 5.0 V - supports single-cell Li-ion (3.0 V), alkaline (3×1.5 V), or regulated 3.3 V/5 V rails without level-shifting.
Standby Current	5 µA - enables multi-month battery life in intermittent-use remote controls using CR2032 or AA cells.
Oscillator Frequency	102–154 kHz - set by external resistor; determines timing of start code (1.6–2.4 ms) and function code (0.8–1.2 ms) pulses.
SO/SC Output Format	Dual-channel encoded serial protocol - SO carries logic-level frame; SC adds 51–77 kHz carrier modulation for IR transmission.
PC Pin Drive	Open-drain, active-low - sinks ≥200 µA at 0.4 V, directly interfaces with enable pins of common PMICs or discrete MOSFET gates.
Input Logic Threshold	V_IL ≤ 0.8 V, V_IH ≥ 3.0 V - compatible with direct connection to tactile switches pulled to V_CC or GND.
Operating Temperature	−10 °C to +40 °C ambient - validated for indoor toy and handheld remote use, not extended industrial range.

Pinout & Package

PT8A977BPE is available in 14-pin DIP and 14-pin SOIC packages. Pin numbering follows standard dual-inline and small-outline conventions with pin 1 at top-left (notch/dot end).

Pin	Circuit Role	Design Meaning
1	OFF	Active-high shutdown control: pulls external power rail low when asserted; internal pull-up enabled.
2	Backward	Input: grounded to select Backward action; internal pull-up ensures default HIGH state.
3	GND	Ground reference for all analog and digital circuitry; must be low-impedance connection.
4	Forward	Input: grounded to select Forward action; internal pull-up ensures default HIGH state.
5	Turbo	Input: grounded to activate Turbo mode; debounced internally; no external RC needed.
6	SC	Output: carrier-modulated serial data (51–77 kHz) for IR LED drive or RF modulator input.
7	SO	Output: unmodulated serial data frame for direct RF baseband or wired interface.
8	V_CC	Positive supply: accepts 1.8–5.0 V; bypass capacitor (0.1 µF) required at pin for noise immunity.
9	PC	Output: open-drain power-control signal; sinks current to disable external regulator or switch.
10	OSCO	Oscillator output: connects to external resistor (200 kΩ typical) to set base frequency.
11	OSCI	Oscillator input: completes RC tank with OSCO; sets oscillator frequency and stability.
12	OFF	Redundant OFF pin - identical function to Pin 1; allows flexible PCB layout routing.
13	Left	Input: grounded to select Left action; internal pull-up ensures default HIGH state.
14	Right	Input: grounded to select Right action; internal pull-up ensures default HIGH state.

Key Features

Feature	Design Value
Integrated oscillator with resistor tuning	Eliminates crystal or ceramic resonator; frequency adjusted from 102–154 kHz via single external resistor.
Auto-power-off with wake-on-button	Reduces average current to ~5 µA during idle; resumes full operation within microseconds of button press.
Dual-output encoding (SO + SC)	SO supports baseband RF or wired links; SC provides IR-compatible carrier modulation without external modulator.
Power-control output (PC pin)	Directly gates external 3.3 V/5 V supply, enabling full-system sleep - no secondary controller required.
Five dedicated function inputs	Hardwired mapping for Forward/Backward/Left/Right/Turbo eliminates firmware or configuration overhead.

Applications

RC Toy Transmitter

IR Remote Control Unit

Use Scenario: Handheld transmitter for 2.4 GHz or 49 MHz RC cars with directional and speed control.

IC Role / Device Role / Timing Role: Encoder generating time-synchronized function codes on SO/SC; oscillator sets frame timing and carrier frequency.

Use Value: Enables compact, low-BOM transmitter design with integrated power gating - extends CR2032 battery life beyond 6 months.

Use Scenario: Consumer-grade infrared remote for educational robotics kits with five motion commands.

IC Role / Device Role / Timing Role: IR encoder driving IR LED through SC output; SO used for debug/test interface via microcontroller UART.

Use Value: Eliminates need for separate carrier generator or microcontroller-based encoding - reduces BOM count by 3–4 components.

Low-Power Wireless Remote

Toy Safety Power Management

Use Scenario: Battery-operated wireless remote for STEM learning platforms using ASK/OOK RF link.

IC Role / Device Role / Timing Role: Baseband encoder on SO pin; PC pin controls RF transceiver enable to minimize quiescent draw.

Use Value: Achieves sub-10 µA system standby by coordinating encoder sleep and RF module shutdown.

Use Scenario: Safety-critical toy remote requiring automatic power cutoff after 30 seconds of inactivity.

IC Role / Device Role / Timing Role: OFF pin asserts external load switch; internal counter triggers shutdown independent of host MCU.

Use Value: Meets IEC 62115 toy safety standards for automatic power removal without software dependency.

Equivalent & Alternatives

The following parts are listed as comparable options for similar remote control encoder applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PT8A977BP	Same die, Pb-free (RoHS-compliant) version; identical electrical specs and pinout.	No functional difference; suitable for same PCB footprints and designs requiring lead-free assembly.	Select PT8A977BP for RoHS-compliant production; PT8A977BPE adds tape-and-reel packaging for automated SMT placement.
PT2262	12-bit addressable encoder; requires external oscillator (crystal/resonator); no auto-power-off or PC output.	Lacks integrated power management and wake-on-button; needs external timing component and MCU coordination for sleep.	Choose PT2262 only if address coding and longer frame length are required; PT8A977BPE offers lower BOM cost and simpler power architecture.

Compared with PT8A977BP, PT8A977BPE adds tape-and-reel packaging but shares identical performance; versus PT2262, it integrates oscillator, power control, and wake logic - reducing external parts by 4 and eliminating firmware dependencies for basic 5-function remotes.

Availability

PT8A977BPE is available at Aetrix Electronics and suitable for RC toy transmitters, infrared remote control units, low-power wireless remotes, and toy safety power management systems requiring stable component supply and long-lifecycle support.

Supply support for PT8A977BPE 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

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-performance interface, timing, and connectivity ICs for consumer, computing, and communications markets.

The PT8A977BPE belongs to Pericom's legacy remote control encoder product line, designed specifically for cost-sensitive, battery-powered 5-function RC toys and educational devices requiring minimal external components and autonomous power management.

FAQ

What is the function of the PC pin on PT8A977BPE?

The PC (Power Control) pin is an open-drain, active-low output that sinks current to disable external power regulators or load switches. When asserted, it cuts power to downstream circuits like RF transceivers or motor drivers. It remains inactive during normal operation and activates only during auto-power-off or when the OFF pin is driven high.

Can PT8A977BPE operate without an external resistor?

No - the PT8A977BPE requires an external resistor between OSCO and OSCI pins to configure its on-chip RC oscillator. Without it, no clock is generated, and encoding functionality halts. Typical value is 200 kΩ, yielding ~128 kHz; values from 100 kΩ to 470 kΩ adjust frequency across the 102–154 kHz range.

How does PT8A977BPE pair with PT8A978B/978BL decoders?

PT8A977BPE and PT8A978B/978BL form a matched encoder-decoder pair: their on-chip oscillators must track within ±25% frequency error to ensure reliable decoding. The SO/SC signals from PT8A977BPE feed SI and OSCO/OSCI inputs on the decoder, which reconstructs the five output actions using fault-tolerant sampling and latch logic.

Is PT8A977BPE pin-compatible with PT8A977BW?

Yes - PT8A977BPE (14-pin SOIC, Pb-free, tape-and-reel) and PT8A977BW (14-pin SOIC, Pb-free, tube) share identical pinout, electrical characteristics, and thermal profile. The suffix difference indicates packaging only: 'E' denotes embossed tape-and-reel for SMT machines; 'W' denotes bulk tube packaging for manual or semi-automated assembly.

PT8A977BPE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Bulk

Product Status:: Obsolete

Motor Type - Stepper:: -

Motor Type - AC, DC:: -

Function:: Controller - Commutation, Direction Management

Output Configuration:: -

Interface:: -

Technology:: -

Step Resolution:: -

Applications:: -

Current - Output:: -

Voltage - Supply:: 1.8V ~ 5V

Voltage - Load:: -

Operating Temperature:: -10°C ~ 40°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-DIP

PT8A977BPE FAQ

1.How can I place an order for PT8A977BPE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT8A977BPE 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 PT8A977BPE reliable?

The price and inventory of PT8A977BPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A977BPE is usually 5 days.

3.What payment methods are accepted for PT8A977BPE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT8A977BPE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT8A977BPE?

PT8A977BPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT8A977BPE 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 PT8A977BPE?

For technical support, including PT8A977BPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A977BPE requirements.

6.How does Aetrix verify that PT8A977BPE is sourced from the original manufacturer or authorized distributors?

All PT8A977BPE 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 PT8A977BPE meets industry standards.

7.What is the process for return or replacement of PT8A977BPE?

All PT8A977BPE units undergo pre-shipment inspection (PSI). If there is an issue with PT8A977BPE, 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 PT8A977BPE part is unused and in its original packaging.

Return procedure for PT8A977BPE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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