What does this symbol represent in SN74ALS232B datasheet

[shashi123]

In datasheet SN74ALS232B by TI, there is this elliptical symbol with two lines inside can you please tell me what it is?
On page number 3 [logic diagram] Check the signal LDCK from there you can see the buffer below it and to it, an "elliptical symbol with two lines inside" (attached the image) is connected. please let me know what is this symbol means.
Please find the attachment for the symbol and circuit.

 

[barry]

I’ve never seen that before, but based on the surrounding circuit, i’d guess it’s a delay line. I have no idea what that block with “1D“ and “C1” is either. Maybe a flip flop? Terrible schematic, regardless.

 

[dick_freebird]

If this happens to be a RS-232 receive channel then that symbol probably represents the special input divider / level shift that must precede the 5V logic chain.

 

[barry]

If this happens to be a RS-232 receive channel then that symbol probably represents the special input divider / level shift that must precede the 5V logic chain.

This is a FIFO. It has nothing to do with RS232.

 

[FvM]

Looks like a pulse delay for edge detection. As far as I'm aware of no standardized logic symbol.

 

[Easy peasy]

Electrical Conductor Symbols: Lines, Wires, Cables. Etc.

Electrical Conductor Symbols: Lines, Wires, Cables and other conductors used to transport the electrical energy

www.electrical-symbols.com

delay line - usually has info annotated ...

 

[shashi123]

Electrical Conductor Symbols: Lines, Wires, Cables. Etc.

Electrical Conductor Symbols: Lines, Wires, Cables and other conductors used to transport the electrical energy

www.electrical-symbols.com

delay line - usually has info annotated ...

Thank you all for your response,
@Easy peasy:
what is the info attached, can you please explain?
Also, one more question I have. If it's a delay line, is it a phase delay on the clock (eg:45 deg, 90deg,..etc)

 

[barry]

Thank you all for your response,
@Easy peasy:
what is the info attached, can you please explain?
Also, one more question I have. If it's a delay line, is it a phase delay on the clock (eg:45 deg, 90deg,..etc)

I‘m pretty sure it’s a time delay; a phase delay would imply some frequency information. it’s just to delay an edge so a pulse can be generated.