OTP Voice Chip

Q: Q: How long does it take to program custom audio into OTP chips?

After finalizing audio files, mask ROM preparation takes 2-3 weeks. Total lead time from audio submission to mass production: 4-6 weeks. Free samples of standard versions available within 3 days.

Q: Q: Can OTP chips drive speakers directly without external amplifier?

Yes! All WTN6 series chips have built-in PWM output that drives 8Ω 0.5W speakers directly, or DAC output for external amplifier. No additional audio amplifier IC needed, saving cost and space.

OTP (One Time Programmable) voice chip means one-time programmable voice chip, Widely used in electronic locks, home appliances, and various application scenarios that require convenient sound prompt

OTP Voice Chip Comparison

Model	Capacity	Voltage	Standby Current	Interface	Package
WTN6040-8S	40s	2.4-5.2V	<5μA	Pulse / Serial	SOP8
WTN6096-8S	96s	2.4-5.2V	<5μA	Pulse / Serial	SOP8
WTN6170-8S	170s	2.4-5.2V	<5μA	Pulse / Serial	SOP8

Why Choose OTP Voice Chips?

Lowest Cost for High-Volume Production

OTP chips use mask ROM — once audio is programmed, unit cost is minimal. Ideal for >3K volume with fixed audio content.

Ultra-Low Power Consumption

<5µA standby current extends battery life. Perfect for always-on devices like smart locks and wireless sensors.

Simple Integration & Direct Speaker Drive

Built-in 0.5W PWM amplifier drives 8Ω speaker directly — no external amplifier needed. Saves BOM cost and PCB space.

Proven Reliability for Industrial Use

-20°C to +75°C operating range, watchdog timer, accurate ±1% oscillator. 27+ years manufacturing experience.

OTP vs Programmable Voice Chips: Which to Choose?

Feature	OTP (WTN6 Series)	Programmable Voice IC
Audio Content	Fixed (Mask ROM)	Erasable (Flash)
Best For	>3K volume production	Prototyping & small batches
Unit Cost	Lowest	Moderate
Lead Time	2-3 weeks (Mask Production)	Stock Available
Flexibility	Cannot update after production	Update anytime

Choose OTP for cost-sensitive high-volume production. Choose Programmable for flexible development or lower volume.

OTP Voice Chip Applications

Frequently Asked Questions (FAQ)

Q: What does "OTP" mean and how is it different from programmable chips?

OTP (One-Time Programmable) uses mask ROM — audio content is permanently programmed during manufacturing. It’s cost-effective for high-volume (>3K units) with fixed audio. Programmable chips use Flash memory and can be updated anytime, ideal for prototyping or lower volume.

Q: What is the MOQ for OTP voice chips?

Typical MOQ is 3,000-10,000 pieces because OTP requires custom mask ROM programming. For prototyping or lower volume (<3K), consider our Programmable Voice Chips (WT588F series) with 100-500pcs MOQ.

Q: How long does it take to program custom audio into OTP chips?

After finalizing audio files, mask ROM preparation takes 2-3 weeks. Total lead time from audio submission to mass production: 4-6 weeks. Free samples of standard versions available within 3 days.

Q: Can OTP chips drive speakers directly without external amplifier?

Yes! All WTN6 series chips have built-in PWM output that drives 8Ω
0.5W speakers directly, or DAC output for external amplifier. No
additional audio amplifier IC needed, saving cost and space.

CHOOSE MORE VOICE CHIPS

Not Sure OTP is Right for You? Explore Other Options:

Programmable Voice Chips (Flash-Based)

Best for: Prototyping, frequent updates, small-medium volume

Model	Capacity	Output	Best For
WT588F02B-8S	170s	DAC / PWM	Standard Development
WT588F04A-8S	340s	DAC / PWM	Standard Development
WT588F08A-8S	680s	DAC / PWM	Long Audio Playback
WT588F40B-16S	3400s	PWM / DAC	Medium Capacity Applications
WT588F80B-16S	6800s	PWM / DAC	High Capacity Applications

High-Capacity Voice Chips

Best for: Long-duration applications at lowest cost

Model	Capacity	Output	Best For
WT588F40B-16S	3400s	PWM / DAC	Medium Capacity Applications
WT588F80B-16S	6800s	PWM / DAC	High Capacity Applications

Ready to Start Your OTP Voice Chip Project?

Get custom audio programming, free samples, and technical support. We’ll recommend the optimal OTP model and provide cost estimates within 24 hours. 27+ years voice IC experience.