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SN74ALVTH32374 Folha de dados(PDF) 1 Page - Texas Instruments |
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SN74ALVTH32374 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 10 page SN54ALVTH32374, SN74ALVTH32374 2.5-V/3.3-V 32-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCES280 – SEPTEMBER 1999 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D State-of-the-Art Advanced BiCMOS Technology (ABT) Widebus ™ Design for 2.5-V and 3.3-V Operation and Low Static Power Dissipation D Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 2.3-V to 3.6-V VCC) D Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C D High Drive (–24/24 mA at 2.5-V VCC and –32/64 mA at 3.3-V VCC) D Ioff and Power-Up 3-State Support Hot Insertion D Use Bus Hold on Data Inputs in Place of External Pullup/Pulldown Resistors to Prevent the Bus From Floating NOTE: For tape and reel order entry: The GKER package is abbreviated to KR. D Auto3-State Eliminates Bus Current Loading When Output Exceeds VCC + 0.5 V D Flow-Through Architecture Facilitates Printed Circuit Board Layout D Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise D ESD Protection Exceeds JESD-22 – 2000-V Human-Body Model – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) (A114-A) D Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II D Packaged in Plastic Fine-Pitch Ball Grid Array Package description The ’ALVTH32374 devices are 32-bit edge-triggered D-type flip-flops with 3-state outputs designed for 2.5-V or 3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. These devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. These devices can be used as four 8-bit flip-flops, two 16-bit flip-flops, or one 32-bit flip-flop. On the positive transition of the clock (CLK), the Q outputs of the flip-flops take on the logic levels set up at the data (D) inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. When VCC is between 0 and 1.2 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.2 V, OE 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. These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. The SN54ALVTH32374 is characterized for operation over the full military temperature range of –55 °C to 125 °C. The SN74ALVTH32374 is characterized for operation from –40°C to 85°C. Copyright © 1999, Texas Instruments Incorporated UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Widebus is a trademark of Texas Instruments Incorporated. |
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Descrição semelhante - SN74ALVTH32374 |
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