SN74ABT16833
- Members of the Texas Instruments WidebusTM Family
- State-of-the-Art EPIC-IIBTM BiCMOS Design Significantly Reduces Power Dissipation
- Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
- Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C
- Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise
- Flow-Through Architecture Optimizes PCB Layout
- High-Drive Outputs (-32-mA IOH, 64-mA IOL)
- Parity-Error Flag With Parity Generator/Checker
- Register for Storage of Parity-Error Flag
- Package Options Include Plastic 300-mil Shrink Small-Outline
(DL) and Thin Shrink Small-Outline (DGG) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center
Spacings
Widebus and EPIC-IIB are trademarks of Texas Instruments Incorporated.
The 'ABT16833 consist of two noninverting 8-bit to 9-bit parity bus transceivers and are designed for communication between data buses. For each transceiver, when data is transmitted from the A bus to the B bus, an odd-parity bit is generated and output on the parity I/O pin (1PARITY or 2PARITY). When data is transmitted from the B bus to the A bus, 1PARITY (or 2PARITY) is configured as an input and combined with the B-input data to generate an active-low error flag if odd parity is not detected.
The error (1
or 2) output is configured as an
open-collector output. The B-to-A parity-error flag is clocked into
1 (or 2) on the low-to-high transition of
the clock (1CLK or 2CLK) input. 1 (or 2) is
cleared (set high) by taking the clear (1
or 2) input low.
The output-enable (
and
) inputs can be
used to disable the device so that the buses are effectively
isolated. When both and
are low, data
is transferred from the A bus to the B bus and inverted parity is
generated. Inverted parity is a forced error condition that gives the
designer more system diagnostic capability.
To ensure the high-impedance state during power up or power down,
should be tied
to VCC through a pullup resistor; the minimum value of the
resistor is determined by the current-sinking capability of the
driver.
The SN54ABT16833 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABT16833 is characterized for operation from -40°C to 85°C.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | Dual 8-Bit To 9-Bit Parity Bus Transceivers datasheet (Rev. D) | 1997. 1. 1 |
설계 및 개발
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|---|---|---|
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