PI74ALVTC16374A

PI74ALVTC16374 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 16-Bit D-Type Flip-Flop with 3-State Outputs Product Features Product Description • The PI74ALVTC Family is designed for low voltage operation, VDD = 1.8V to 3.6V • Supports Live Insertion • 3.6V I/O Tolerant Inputs and Outputs • Bus Hold • High Drive, –32/64mA @ 3.3V • Uses patented Noise Reduction Circuitry • Power-Off high impedance inputs and outputs • Industrial operation at –40°C to +85°C • Packaging (Pb-free & Green available): – 48-pin 240 mil wide plastic TSSOP (A) The PI74ALVTC16374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. This device can be used as two 8-bit flip-flops or one 16bit flip-flop. On the positive transition of the clock (CLK) input, the Q outputs of the flip-flop 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 a high-impedance state in which the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without need for 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. To ensure the high-impedance state during power up or power down, OE should be tied to VDD through a pullup resistor; whose minimum value is determined by the current-sinking capability of the driver. Logic Block Diagram 1OE 1CLK 1 The family offers both I/O Tolerant, which allows it to operate in mixed 1.8/3.6V systems, and “Bus Hold,” which retains the data input’s last state whenever the data input goes to high-impedance, preventing “floating” inputs and eliminating the need for pullup/down resistors. 48 >C1 2 1D1 47 1Q1 1D To Seven Other Channels 2OE 2CLK 24 25 >C1 13 2D1 36 2Q1 1D To Seven Other Channels 1 PS8356C 11/06/08 PI74ALVTC16374 16-Bit D-Type Flip-Flop with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Truth Table(1) Product Pin Description Pin Name De s cription OE Output Enable Input (Active LOW) CLK Inputs Outputs OE CLK D Q Clock Input L ↑ H H Dx Data Inputs L ↑ L L Qx 3- State Outputs L H or L X Q0 GND Ground H X X Z VDD Power Notes: 1. H = High Signal Level L = Low Signal Level X = Don’t Care or Irrelevant Z = High Impedance Product Pin Configuration 1CLK 1D1 1OE 1Q1 1 48 2 47 1Q2 GND 3 46 4 45 1Q3 1Q4 VDD 1Q5 1Q6 5 44 6 43 7 42 8 41 9 40 GND 1Q7 10 39 11 38 1Q8 2Q1 2Q2 12 37 13 36 14 35 1D8 2D1 2D2 GND 15 34 GND 2Q3 2Q4 VDD 16 33 17 32 18 31 2D3 2D4 VDD 2Q5 2Q6 GND 19 30 20 29 21 28 2Q7 2Q8 2OE 22 27 23 26 2D5 2D6 GND 2D7 2D8 24 25 2CLK 1D2 GND 1D3 1D4 VDD 1D5 1D6 GND 1D7 2 PS8356C 11/06/08 PI74ALVTC16374 16-Bit D-Type Flip-Flop with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Supply Voltage Range, VDD .............................................................. –0.5V to 4.6V Input Voltage Range, VI ....................................................................... -0.5V to 4.6V Output Voltage Range, VO (3-Stated) ................................. -0.5V to 4.6V Output Voltage Range, VO(1) (Active) ....................... –0.5V to VDD +0.5V DC Input Diode Current (IIK) VI