name: HT99U210A function: Enhanced Cordless Phone Controller package: SKDIP/SOP28,28 manufacturer: Holtek +--()--+ PA7(C8B) | 1 28| PA6(C7B) PD0(KT) | 2 27| PA5(C6B) PB0(R1B) | 3 26| PA4(C5B) PB1(R2B) | 4 25| PA3(C4B) PB2(R3B) | 5 24| PA2(C3B) PB3(R4B) | 6 23| PA1(C2B) PB4(R5B) | 7 22| PA0(C1B) PD2(HKSB) | 8 21| PC4(POB) PD4(M/BB) | 9 20| PC3(HFO) PD5(HFI) |10 19| PC2(XMUTEB) PD6(MODE) |11 18| DTMF X1 |12 17| PCI(HDIB) X2 |13 16| PCO(HDO) VDD |14 15| VSS +------+ This pinout came from the Chipdir: http://www.chipdir.org/