Is there a single ended input single ended output amplifier integrated circuit?

[electronx]

Yes, nowadays everything is used as operational amplifiers with differential input , single ended output , or fully differential output  (common mode rejection ratio is high, common mode noise is canceled.) These can also be used as single ended. However, the question I'm curious about is this. I've worked with amplifiers that contain discrete single ended input and single ended output before. So are there integrated circuits with single-ended inputs and single-ended outputs (past or present)?

[Jacques]

You mean something like the BUF634A?

[electronx]

yeap like
BUF634A
MAX2678
BGU8M1UK

[magic]

TL431, and it's a proper amplifier, with more than unity gain

[SteveThackery]

TL431, and it's a proper amplifier, with more than unity gain

That's a precision shunt regulator. I'm wondering if there is some kind of magic you can do with it. 

[electronx]

+11111111

[TimFox]

TL431, and it's a proper amplifier, with more than unity gain

That's a precision shunt regulator. I'm wondering if there is some kind of magic you can do with it. 

I believe there are some amplifier circuits in the TL431 data sheets.

Also, there are many single-ended ICs for RF amplifiers, with relatively simple internal circuits.

[mawyatt]

Almost all the RF/MW type Integrated Amplifiers are Single Ended In/Out and usually 50 ohms nominal impedance.

Best,

[electronx]

A finding: The differential input advantage was discovered with vacuum tubes, so when designing the IC, differential input amplifiers, which already existed and had known advantages, were designed instead of single-ended input.For this reason, integrated designers of that period (1950) turned to transistor-based opamps with differential inputs instead of directly fitting single-ended input amplifiers into the integrated circuit.

[TimFox]

Also, it is easier to design ICs that require accurate matching between pairs of semiconductors or resistors instead of accurate characteristics or resistances of single devices.
Differential amplifiers are a natural use of matched devices.

[magic]

TL431, and it's a proper amplifier, with more than unity gain

That's a precision shunt regulator. I'm wondering if there is some kind of magic you can do with it. 

Add a pullup resistor (or active load) to the cathode and it acts like an NPN with fairly accurate Vbe= 2.5V, Vce(sat) = 2V and gm = 5A/V.

[PGPG]

In 74HCU04 you have 6 single ended input single ended output amplifiers.

[electronx]

In 74HCU04 you have 6 single ended input single ended output amplifiers.

that thing is more digital than analog applications.

[Someone]

In 74HCU04 you have 6 single ended input single ended output amplifiers.

that thing is more digital than analog applications.

Nope:
https://www.qsl.net/l/lu7did/docs/QRPp/TTL_74HC04%20As%20Linear%20Amplifier_SPRATCD.pdf
"The 74HCU04 – A Miser's Dream"
Many people have used the linear region of CMOS for fun and profit. If I want digital I'll go with some Schmitt triggers.

[PGPG]

In 74HCU04 you have 6 single ended input single ended output amplifiers.

that thing is more digital than analog applications.

Application depends on designer.
If you need digital you use 74HC04. Its unbuffered version (74HCU04) was created just to allow to use it as analog inverting amplifier (what is not possible with standard, buffered version).
In my opinion it is exactly what you were asking about.