thats 3 chips when its all in the 2 TPICs... although the specs say the PCF can drive an LED , and the total output is 100mA, so it might be OK for 8 x 5v relays drawing less than 12mA ?
The TPIC can sink 150mA per latch, and handle up to 50v relays, and uses just 3 pins of the micro.