Help identify TSSOP-8 chip

[ARF]

Hi guys,

I'm repairing NEC thermal camera TVS-8502.

The one of tantalum capacitors is shorted, and the chip in TSSOP-8 case is damaged on the rail with this capacitor.
The case is damaged, but the board has the same ICs.
 
The chip has Siliconix like mark. Top marking is "543A".  ~1995 production year

Pinout:
1 Power rail 1 +
2 GND
3 GND
4 ??
5 ??
6 Power rail 2 +
7 Power rail 2 +
8 Power rail 1 +

dual FET?

FOUND: Si6543DQ

[fzabkar]

Si6543DQ, Vishay/Siliconix, Dual N- and P-Channel 30-V (D-S) MOSFET, TSSOP-8:
https://web.archive.org/web/20010620082030/http://www.vishay.com/docs/70181.pdf

Si6954ADQ, Vishay/Siliconix, Dual N-ch MOSFET, 53mOhm @ 3.4A, 10V, 30V, TSSOP-8:
https://www.vishay.com/docs/71130/71130.pdf

Si6954DQ
http://www.mouser.com/ds/2/427/70179-279753.pdf