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74ALS651D Scheda tecnica(PDF) 2 Page - NXP Semiconductors |
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74ALS651D Scheda tecnica(HTML) 2 Page - NXP Semiconductors |
2 / 13 page Philips Semiconductors Product specification 74ALS651/74ALS651-1 74ALS652/74ALS652-1 Transceiver/register 74ALS651/651-1 Octal transceiver/register, inverting (3-State) 74ALS652/652-1 Octal transceiver/register, non-inverting (3-State) 2 1991 Feb 08 853–1407 01670 FEATURES • Independent registers for A and B buses • Multiplexed real-time and stored data • Choice of non-inverting and inverting data paths • 3-State outputs • The -1 versions sinks 48mA I OL within the ±5% VCC range DESCRIPTION The 74LAS651 and 74ALS652 transceivers/registers consist of bus transceiver circuits with 3-State outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes High. Output enable (OEAB, OEBA) and select (SAB, SBA) pins are provided for bus management. The 74LAS651-1 and 74ALS652-1 will sink 48mA if the VCC is limited to 5.0V ± 0.25V. TYPE TYPICAL fMAX TYPICAL SUPPLY CURRENT (TOTAL) 74ALS651/74ALS651-1 140MHz 40mA 74ALS652/74ALS652-1 140MHz 46mA ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 24-pin plastic DIP 74ALS651N, 74ALS651-1N, 74ALS652N, 74ALS652-1N SOT222-1 24-pin plastic SOL 74ALS651D, 74ALS651-1D, 74ALS652D, 74ALS652-1D SOT137-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW A0 – A7 A inputs 1.0/1.0 70 µA/0.1mA B0 – B7 B inputs 1.0/1.0 70 µA/0.1mA CPAB A-to-B clock input 1.0/1.0 20 µA/0.1mA CPBA B-to-A clock input 1.0/1.0 20 µA/0.1mA SAB A-to-B select input 1.0/1.0 20 µA/0.1mA SBA B-to-A select input 1.0/1.0 20 µA/0.1mA OEAB A-to-B output enable input 1.0/1.0 20 µA/0.1mA OEBA B-to-A output enable input 1.0/1.0 20 µA/0.1mA A0 – A7, B0 – B7 A, B outputs 750/240 15mA/24mA A0 – A7, B0 – B7 A, B outputs (-1 version) 750/480 15mA/48mA NOTE: One (1.0) ALS unit load is defined as: 20 µA in the High state and 0.1mA in the Low state. |
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