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DS8921ATM
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Product Detailed Parameters
- Description：IC TRANSCEIVER FULL 1/1 8SOIC
- Mfr：Texas Instruments
- Package：Tube
- Series：-
- Type：Transceiver
- Protocol：RS422
- Number of Drivers/Receivers：1月1日
- Duplex：Full
- Data Rate：-
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Receiver Hysteresis：70 mV
- Grade：-
- Qualification：-
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Overview
The DS8921ATM is a differential line driver and receiver pair in an 8-pin SOIC package. It operates on a single 4.5 V to 5.5 V supply with a typical current of 35 mA. The device provides a typical propagation delay of 12 ns and output skew of 0.5 ns. It supports RS-422 signaling with complementary outputs, ±7 V common-mode input range, and 200 mV sensitivity. Industrial temperature operation spans -40°C to +85°C.
Feature Summary
- Provides differential drive to twisted-pair or parallel wire transmission lines via complementary outputs.
- Features high common-mode input voltage range of ±7 V with 200 mV sensitivity for noise immunity.
- Includes receiver input hysteresis to improve noise margin for slowly changing waveforms.
Applications
- ST506 Disk Drive Standard
- ST412 Disk Drive Standard
- ESDI Disk Drive Standard
- RS-422 Interface
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type, temperature rating, and environmental compliance status. Ensure the component matches the required industrial operating range and interface specifications before procurement.
Selection Notes
Select this component for applications requiring RS-422 compliant differential signaling with TTL/CMOS compatibility. Verify that the system requires the extended -40°C to +85°C operating range provided by the AT suffix. Confirm the SOIC-8 package fits the PCB layout constraints.
Part Context
This part belongs to the DS8921 family from Texas Instruments, which includes variants like the DS8921A and DS8921AT. These devices are designed specifically for disk drive standards and RS-422 interfaces, offering a compact solution for differential data transmission.
Replacement Considerations
DS8921ATMX/NOPB
FAQ
What is the maximum common-mode input voltage supported by the receiver?
The receiver supports a common-mode input voltage range of ±7 V.
Does the device include hysteresis at the receiver input?
Yes, the receiver incorporates typical hysteresis of 70 mV to improve noise margin.
What logic levels are compatible with the driver input?
The driver input is compatible with TTL and CMOS logic levels.
