74 series Flip Flop notes

The following are different 74 series flip flops.

• 74 - two independent D type flip flops with individual D, preset, clear and clock inputs. A low level at the preset or clear sets or resets the flip flop irrespective of the D or clock. When preset and clear are disabled by being high the flip flop is set to the value of the D input on the positive clock edge.
• 175 - four D type flip flops with individual D inputs and both Q and /Q outputs. Common clock and -master reset inputs load and reset all flip flops simultaneously. 
• 273 - octal edge triggered D type flip flops with Individual D inputs and Q outputs. Common clock and /master reset inputs load and reset all flip flops simultaneously. 
• 373 - octal transparent latch D type flip flops with 3-state outputs. A common Latch Enable (LE) enables all flip flops and a common Output Enable (/OE) enables all the outputs.The 573 has a more convenient pin arrangement.
• 374 - octal edge triggered D type flip flops with 3-state outputs. Common clock loads all flip flops simultaneously and a common Output Enable (/OE) enables all the outputs. The 374 does not have a seperate input enable, see 377.
• 377 - octal edge triggered D type flip flops. Common clock loads all flip flops simultaneously when input enable (date enable) is low. The 377 does not have 3-state output.
• 533 - Functionally the same as 373 but with inverting outputs.
• 563 - Functionally the same as 373 but with inverting outputs and a more convenient pin arrangement. 
• 564 - Functionally the same as the 574 but has inverting outputs.
• 573 - Functionally the same as 373 but with a more convenient pin arrangement.
• 574 - Functionally the same as the 374 but has a more convenient pin arrangement.