SN54ACT374-SP Texas instruments

SN54ACT374-SP

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SN54ACT374-SP

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Описание

These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the ACT374 devices are D-type edge-triggered flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to 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 the increased drive provide the capability to drive bus lines in bus-organized systems 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 VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

4.5-V to 5.5-V V_CC Operation
Inputs Accept Voltages to 5.5 V
Max t_pd of 10 ns at 5 V
Inputs Are TTL-Voltage Compatible

Number of channels	8
Technology family	ACT
Supply voltage (min) (V)	4.5
Supply voltage (max) (V)	5.5
Input type	TTL-Compatible CMOS
Output type	3-State
Clock frequency (max) (MHz)	90
IOL (max) (mA)	24
IOH (max) (mA)	-24
Supply current (max) (µA)	40
Features	Balanced outputs, Positive input clamp diode, Very high speed (tpd 5-10ns)
Operating temperature range (°C)	-55 to 125
Rating	Space