SN74AC564

Supply voltage range, V   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.5 V to 7 VC
Input voltage range, V  (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to V  + 0.5 V
Output voltage range, V  (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 0.5 V to V  + 0.5 V
Input clamp current, I  (V  < 0 or V > V )  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20 mA
Output clamp current, I  (V  < 0 or V  > V )  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20 mA
Continuous output current, I  (V  = 0 to V )  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50 mA
Continuous current through V  or GND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  200 mA
Maximum power dissipation at T  = 55 C (in still air) (see Note 2): DB package  . . . . . . . . . . . . . . . . . . 0.6 W
DW package  . . . . . . . . . . . . . . . . . . 1.6 W
N package  . . . . . . . . . . . . . . . . . . . . 1.3 W
PW package  . . . . . . . . . . . . . . . . . . 0.7 W
Storage temperature range, T  65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  C to 150 C

The 'AC564 are octal D-type edge-triggeredflip-flops that feature inverting 3-state outputsdesigned specifically for driving highly capacitiveor relatively low-impedance loads. 'AC564 areparticularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, andworking registers.
On the positive transition of the clock (CLK) input,the Q outputs are set to the inverse logic levels setup at the data (D) inputs.

8D 8Q 7Q
A buffered output-enable (OE) input places the GND CLKeight outputs in either a normal logic state (high orlow logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drivethe bus lines significantly. The high-impedance state and increased drive of 'AC564 provide the capability to drive bus lineswithout interface or pullup components.
OE does not affect internal operations of the flip-flops. Old data can be retained or new data can be enteredwhile the outputs are in the high-impedance state.The SN54AC564 is characterized for operation over the full military temperature range of 55°C to 125°C.TheSN74AC564 is characterized for operation from 40°C to 85°C.