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DS7838J883B
DS8838 Quad Unified Bus Transceiver General Description Features The DS8838 is a quad high speed driver/receiver designed for use in bus organized data transmission systems interconnected by terminated 120Ω impedance lines. The external termination is intended to be 180Ω resistor from the bus to the +5V logic supply together with a 390Ω resistor from the bus to ground. The bus can be terminated at one or both ends. Low bus pin current allows up to 27 driver/receiver pairs to utilize a common bus. The bus loading is unchanged when VCC = 0V. The receivers incorporate hysteresis to greatly enhance bus noise immunity. One two-input NOR gate is included to disable all drivers in a package simultaneously. Receiver performance is optimized for systems with bus rise and fall times ≤ 1.0 µs/V. n n n n n n n n n 4 totally separate driver/receiver pairs per package 1V typical receiver input hysteresis Receiver hysteresis independent of receiver output load Guaranteed minimum bus noise immunity of 1.3V, 2V typ. Temperature-insensitive receiver thresholds track bus logic levels 20 µA typical bus terminal current with normal VCC or with VCC = 0V Open collector driver output allows wire-OR connection High speed Series 74 TTL compatible driver and disable inputs and receiver outputs Typical Application DS005812-1 © 1999 National Semiconductor Corporation DS005812 www.national.com DS8838 Quad Unified Bus Receiver May 1999
NS
National Semiconductor Corporation 日本ではナショセミと略称されていたが2011年9月23日、米TI社に買収され、同社のシリコンバレー部門となった。
TI
Texas Instruments Incorporated
U.S.A
世界25ヶ国以上に製造・販売拠点を有する国際的な半導体企業であり、デジタル情報家電、ワイヤレス、ブロードバンド市場に欠かせないデジタル信号処理を行うDSPと、それに関連するアナログIC、マイクロコントローラを主力製品としている。
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