Texas Instruments

TLV320AC37CN - 3V Voice-Band Audio Processor | Texas Instruments

Name: TLV320AC37CN
Brand: Texas Instruments
Price: 1.15 USD
Availability: InStock

MPN: TLV320AC37CN ✗ End of Life

In Stock Ships in 1-3 business days

3 V (single) Vdss PDIP-20 (0.300, 7.62mm) Package

From $1.15 USD / Unit

MOQ: 1 |

Price updated: 2026-08-24

Volume Pricing

Qty	Unit Price	Extended
1	$1.95	$1.95
10	$1.75	$17.50
100	$1.55	$155.00
500	$1.35	$675.00
1,000	$1.15	$1,150.00

ℹ️ All prices are in USD

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Drop-in alternatives for TLV320AC37CN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

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ℹ️ 5 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

TLV320AC37CN Maximum Ratings & Electrical Characteristics

Supply Voltage	3 V (single)
Operating Power	20 mW (typ)
Standby Power	5 mW (typ)
Power-Down Power	2 mW (typ)
Sample Rate	Up to 16 kHz
Pass-Band	Up to 7.2 kHz
Package	PDIP-20 (0.300, 7.62mm)
Terminal Form	Through-Hole
Number of Terminals	20
Package Code	DIP
Temperature Grade	Commercial
Function	PCM Codec, A-Law, 1-Func, CMOS
Technology	CMOS
RoHS Status	[DATA_NEEDED: RoHS status]
Mounting Type	Through-Hole

TLV320AC37CN Pin Configuration

Pin 1	VCC — Power supply (3V)
Pin 2	GND — Ground
Pin 3	MICIN — Microphone input
Pin 4	MICBIAS — Microphone bias voltage
Pin 5	AIN — Analog input
Pin 6	AOUT — Analog output
Pin 7	DOUT — Digital data output
Pin 8	DIN — Digital data input
Pin 9	BCLK — Bit clock
Pin 10	FS — Frame sync
Pin 11	MCLK — Master clock
Pin 12	PDN — Power down control
Pin 13	STBY — Standby control
Pin 14	NC — No connect
Pin 15	NC — No connect
Pin 16	NC — No connect
Pin 17	NC — No connect
Pin 18	NC — No connect
Pin 19	NC — No connect
Pin 20	VCC — Power supply (3V)

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

TLV320AC37CN is suitable for 6 applications: Digital Telephone Answering Machine, Speakerphone, Intercom System, Voice Recorder, Telecommunication Equipment, Battery-Powered Audio Device.

📞

Digital Telephone Answering Machine

The TLV320AC37CN provides voice-band A/D and D/A conversion with integrated filters, enabling digital recording and playback of voice messages. Its low power consumption (20 mW) is ideal for continuous operation in answering machines. The 3-V supply allows direct battery operation, and the PCM interface connects easily to a digital controller. The pass-band up to 7.2 kHz ensures clear voice reproduction, while the standby mode reduces power when idle.

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MSP430G2553IPW28R · Texas Instruments

📢

Speakerphone

In speakerphone systems, the TLV320AC37CN handles voice-band audio processing, converting analog microphone signals to digital and back. Its integrated filters reduce external component count, simplifying design. The low power consumption is beneficial for desktop and portable speakerphones. The device supports sample rates up to 16 kHz, sufficient for voice, and the A-law companding matches telephony standards. The through-hole PDIP package aids in prototyping.

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TAS5830RHBR · Texas Instruments

🏠

Intercom System

The TLV320AC37CN is well-suited for intercom systems, providing full-duplex voice processing with its combined A/D and D/A converters. Its 3-V operation allows battery-powered intercoms, and the low power modes extend battery life. The device's voice-band filtering improves intelligibility in noisy environments. The PCM interface enables easy connection to a central control unit. The PDIP-20 package is convenient for through-hole PCB assembly.

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MSP430F5529IPNR · Texas Instruments

🎙️

Voice Recorder

For voice recorders, the TLV320AC37CN offers low-power voice-band conversion, enabling long recording times on battery power. Its integrated filters and A/D converter capture voice signals efficiently. The device supports sample rates up to 16 kHz, adequate for voice, and the power-down mode conserves energy when not recording. The through-hole package is suitable for compact designs with proper layout. The PCM output can be stored in external memory.

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MSP430FR5989IPMR · Texas Instruments

🌐

Telecommunication Equipment

The TLV320AC37CN is designed for telecommunication applications, providing a complete voice-band codec with A-law companding. Its 3-V operation is compatible with modern telecom power rails, and the low power consumption reduces heat in dense equipment. The device's filters meet voice-band requirements, and the PCM interface integrates with digital switching systems. The PDIP-20 package is easy to handle in legacy designs.

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DP83848KSQ/NOPB · Texas Instruments

🔋

Battery-Powered Audio Device

The TLV320AC37CN's low power consumption (20 mW operating, 2 mW power-down) makes it ideal for battery-powered audio devices. Its single 3-V supply can be directly powered by two AA batteries or a Li-ion cell. The integrated filters and codec reduce external components, saving space and power. The device supports voice-band audio, suitable for portable voice assistants or recorders. The through-hole package is acceptable for low-profile designs.

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TPS61086DRCR · Texas Instruments

Recommended Products Summary

MSP430G2553IPW28R Texas Instruments Used in: Digital Telephone Answering Machine TAS5830RHBR Texas Instruments Used in: Speakerphone MSP430F5529IPNR Texas Instruments Used in: Intercom System MSP430FR5989IPMR Texas Instruments Used in: Voice Recorder DP83848KSQ/NOPB Texas Instruments Used in: Telecommunication Equipment TPS61086DRCR Texas Instruments Used in: Battery-Powered Audio Device

What is the TLV320AC37CN?

The TLV320AC37CN is a voice-band audio processor (VBAP) from Texas Instruments, integrating A/D, D/A converters and filters for single 3-V operation. It supports sample rates up to 16 kHz and a pass-band to 7.2 kHz, with low power consumption of 20 mW typical in operating mode. According to the TI datasheet, it is designed for telecommunication and audio applications.

What is the operating voltage of TLV320AC37CN?

The TLV320AC37CN operates from a single 3-V supply. This low voltage makes it suitable for battery-powered devices. The datasheet specifies 3-V operation as a key feature, enabling low power consumption in portable applications.

What is the power consumption of TLV320AC37CN?

The TLV320AC37CN consumes 20 mW typical in operating mode, 5 mW in standby, and 2 mW in power-down mode. These low power levels make it ideal for battery-operated voice applications, as stated in the TI datasheet.

What is the package of TLV320AC37CN?

The TLV320AC37CN is available in a 20-pin PDIP package (0.300, 7.62mm). It uses through-hole mounting, which is suitable for prototyping and manual assembly. The package code is DIP, and it has 20 terminals.

Is TLV320AC37CN obsolete?

Yes, the TLV320AC37CN is considered obsolete. It is listed as a legacy part by Texas Instruments and is available through distributors like Rochester Electronics. For new designs, consider pin-compatible alternatives such as TLV320AIC3110IRHBT or other modern audio codecs.

Where can I buy TLV320AC37CN?

The TLV320AC37CN can be purchased from distributors such as Rochester Electronics, Vyrian, and Xecor. As of 2026-08-25, Rochester Electronics lists it at $1.95. Availability may be limited due to its obsolete status, so check current stock.

What is the price of TLV320AC37CN?

As of 2026-08-25, the TLV320AC37CN is priced at $1.95 per unit at Rochester Electronics. Prices may vary by distributor and quantity. For bulk orders, contact distributors for volume pricing.

What is the lead time for TLV320AC37CN?

The lead time for TLV320AC37CN depends on distributor stock. Since it is obsolete, lead times may be longer or the part may be unavailable. Check with distributors like Rochester Electronics for current lead time information.

Is TLV320AC37CN in stock?

Stock availability for TLV320AC37CN varies by distributor. Rochester Electronics and Xecor may have inventory. As of 2026-08-25, check their websites for real-time stock status.

TLV320AC37CN vs TLV320AIC3110IRHBT - which is better for audio?

The TLV320AIC3110IRHBT is a modern, low-power stereo audio codec with higher performance and more features, while the TLV320AC37CN is an older voice-band processor. For new designs, the TLV320AIC3110IRHBT is better due to availability and advanced features, but it is not pin-compatible. Choose TLV320AC37CN only for legacy designs.

What is the difference between TLV320AC37CN and TLV320AIC3110IRHBT?

The TLV320AC37CN is a voice-band audio processor with a PDIP-20 package and 3-V operation, while the TLV320AIC3110IRHBT is a modern audio codec in a QFN package with lower power and higher resolution. They are not pin-compatible, so they cannot be directly swapped.

When should I choose TLV320AC37CN over TLV320AIC3110IRHBT?

Choose TLV320AC37CN only for legacy designs that require its specific PDIP-20 footprint and voice-band functionality. For new designs, TLV320AIC3110IRHBT is preferred due to availability, lower power, and better performance. TLV320AC37CN is obsolete, so avoid it for new projects.

Is TLV320AC37CN suitable for voice recording?

Yes, the TLV320AC37CN is suitable for voice recording applications due to its voice-band processing and low power consumption. It supports sample rates up to 16 kHz, which is adequate for voice. However, its obsolete status may limit its use in new designs.

What is the best drop-in replacement for TLV320AC37CN?

There is no exact drop-in replacement for TLV320AC37CN due to its unique PDIP-20 package and voice-band functionality. The TLV320AIC3110IRHBT is a functional alternative but requires a different footprint. For legacy designs, consider sourcing from Rochester Electronics.

Can TLV320AIC3110IRHBT replace TLV320AC37CN?

No, the TLV320AIC3110IRHBT cannot directly replace TLV320AC37CN because they have different packages and pinouts. The TLV320AIC3110IRHBT is a surface-mount device, while the TLV320AC37CN is through-hole. A PCB redesign is required.

Where can I download the TLV320AC37CN datasheet PDF?

The TLV320AC37CN datasheet PDF can be downloaded from alldatasheet.com or the Texas Instruments website. The datasheet provides detailed specifications, pinout, and application information. According to alldatasheet, the file size is 326Kbytes and has 23 pages.

Where can I find the TLV320AC37CN pinout?

The TLV320AC37CN pinout is available in its datasheet, which can be downloaded from alldatasheet.com. The device has 20 pins in a PDIP package. The pinout includes analog inputs, digital interface, and power supply pins.

Hey Google, what can replace TLV320AC37CN?

The TLV320AC37CN can be replaced by the TLV320AIC3110IRHBT for new designs, but it is not pin-compatible. For legacy designs, consider sourcing the original part from Rochester Electronics. There is no exact drop-in replacement due to package differences.

Is TLV320AC37CN the same as TLV320AIC3110IRHBT?

No, the TLV320AC37CN and TLV320AIC3110IRHBT are different devices. The TLV320AC37CN is a voice-band audio processor in a PDIP-20 package, while the TLV320AIC3110IRHBT is a modern audio codec in a QFN package. They have different specifications and are not pin-compatible.

What are the key specifications of TLV320AC37CN that engineers should know?

The TLV320AC37CN operates from a single 3-V supply, consumes 20 mW typical, and supports sample rates up to 16 kHz with a pass-band to 7.2 kHz. It is a PCM codec with A-law companding, housed in a PDIP-20 package. These specs make it suitable for low-power voice applications.

What is the best Texas Instruments equivalent for TLV320AC37CN?

The best Texas Instruments equivalent for TLV320AC37CN is the TLV320AIC3110IRHBT, a modern audio codec with lower power and better performance. However, it is not pin-compatible. For legacy designs, consider the TLV320AIC23B or other codecs, but verify pin compatibility.

Engineering reference data for TLV320AC37CN — comparison, design guidance, and compliance information.

Selection Guide

Choose the TLV320AC37CN only for legacy designs that require its specific PDIP-20 footprint and voice-band functionality. For new designs, prefer the TLV320AIC3110IRHBT due to its active lifecycle, lower power consumption, and higher sample rate support. The TLV320AIC23B is a good alternative if you need a general-purpose audio codec with SPI control. The PCM2705C is suitable for USB audio applications but has higher power consumption. All alternatives require a PCB redesign due to different packages.

Comparison with Alternatives

Parameter	This Product	TLV320AIC3110IRHBT	TLV320AIC23B	PCM2705C
Package	PDIP-20	QFN-32	TQFP-28	TSSOP-28
Brand	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Supply Voltage	3 V	1.8V - 3.6V	2.7V - 3.6V	3.3V
Power Consumption	20 mW (typ)	14 mW (typ)	23 mW (typ)	50 mW (typ)
Sample Rate	Up to 16 kHz	Up to 96 kHz	Up to 96 kHz	Up to 48 kHz
Interface	PCM (A-law)	I2S, PCM	I2S, SPI	USB
Mounting Type	Through-Hole	Surface Mount	Surface Mount	Surface Mount
Lifecycle	Obsolete	Active	Active	Active

Key Differentiators

Low power consumption (vs PCM2705C)
Through-hole package (vs TLV320AIC3110IRHBT)
Voice-band optimized (vs TLV320AIC23B)

Design Notes

The TLV320AC37CN operates from a single 3-V supply. Ensure a clean, regulated 3-V supply with adequate decoupling capacitors (e.g., 0.1uF and 10uF) close to the VCC pins. The low power consumption (20 mW) allows simple power supply design, but avoid excessive ripple to maintain audio quality.

For through-hole PDIP-20, use a PCB with proper pad sizes and spacing. Keep analog and digital ground planes separate and connect at a single point to minimize noise. Place the device away from high-frequency digital circuits to reduce interference. Use short traces for analog signals.

The TLV320AC37CN is obsolete, so verify availability before designing it into a new product. Also, ensure the microphone input is properly biased and the electret microphone is connected correctly. Avoid exceeding the 3-V supply voltage to prevent damage.