SN54AC563

Features:

2-V to 6-V V_CC   Operation
Inputs Accept Voltages to 6 V
Max t  of 9 ns at 5 V
3-State Inverting Outputs Drive Bus Lines Directly Full Parallel Access for Loading
Flow-Through Architecture to Optimize PCB Layout


Pinout




Specifications

Supply voltage range, V_CC   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  -0.5 V to 7 V
Input voltage range, V_I (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to V_CC  + 0.5 V
Output voltage range, V_O  (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to V_CC  + 0.5 V
 Input clamp current, I_IK  (V_I  < 0 or V_I  > V_CC )  . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
Output clamp current, I_OK  (V_O  < 0 or V_O  > V_CC )  . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .  ±20 mA
Continuous output current, I_O   (V_O   = 0 to V_CC )  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  ±50 mA
Continuous current through V_CC  or GND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . .   ±200 mA
Package thermal impedance, JA (see Note 2): DB package  . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . .  70°C/W
                                                                           DW package  . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . .  58°C/W
                                                                           N package  . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .  69°C/W
                                                                           NS package  . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . .  60°C/W
                                                                           PW package  . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . .  83°C/W
Storage temperature range, T  -65°. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . ..... . . . . . . . . . . .  C to 150° C



Description

The 'AC563 devices are octal D-type transparent latches with 3-state outputs. When the latch-enable (LE) input is high, the Q outputs follow the complements of the data (D) inputs. When LE is taken low, the Q outputs are latched at the inverse logic levels set up at the D inputs.

A buffered output-enable (OE) input of AC563 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 of AC563 provide the capability to drive bus lines without need for interface or pullup components.

OE does not affect internal operations of the latches. Old data of AC563 can be retained or new data can be entered while the outputs are in the high-impedance state.