As impressive as this is, it's likely 3-4 generations back from what's currently shipping. It's a switch-on-chip (SoC) set up for 12.5 Gbit SerDes. As pointed out elsewhere, it might have been deployed for 16 10G front panel ports, another 160G to a backplane ASIC and some of the remaining ports for control plane use.
Reading between the lines a bit it might have been used in one of the Nexus 5K's - which would put it at around 8 years old, depending on how we're counting.
Possibly, but it's in the right neighborhood. It depends on whether we're counting from the time of design/initial fabrication or actual mass production and general sale.
The point is that 12.5Gb/s SerDes pretty much means they'd be practically to 10/40G. At least in the DC networking world this puts it several generations back.
NPUs are not used in data centers. They don't need the expensive but totally flexible network processing capabilities. Think carrier and enterprise access networks that have lower Ethernet bandwidth requirements, but higher processing requirements per packet.
This is an NPU, so for sure not in the 5k, or any other Nexus. Those are all fixed-function ASICs, in some cases (like the 3k, or the 5k's L3 module) actually Broadcom ASICs.
The original 5k (which was a Nuova Systems product before cisco spun them in), had a 1040G crossbar (nicknamed Altos) and a bunch of 80G line chips (nicknamed Gatos).
Reading between the lines a bit it might have been used in one of the Nexus 5K's - which would put it at around 8 years old, depending on how we're counting.