2

FX002DW

1

3

4

5

6

8

9

11

13

16

2, 7, 10,

12, 14, 15

FX002J

1

3

4

5

6

7

9

11

13

16

2, 8,

10, 12,

14, 15

Pin Number

Function

Signal In: The inverting input to the analogue amplifier/comparator. Used with the Signal Bias

pin; external coupling components are required (see Figure 2).

Signal Bias: The output of the analogue amplifier/comparator. Do not load this pin with

peripheral circuitry; there is no drive capacity for off-chip signalling. The feedback resistor

should be not less than 200k

Ω. See Figure 2.

V

two V

the host circuit's supply line. Do not attempt to draw current from either V

and test purposes.

Xtal: The output of the on-chip clock oscillator inverter.

Xtal/Clock: The input to the on-chip clock oscillator inverter; this may be a Xtal, resonator or

clock pulse input. The selection of this frequency will affect the operational input signal

bandwidth (and output frequency) of this device; refer to Table 2. Note that the choice of V

DD

will determine the maximum Xtal/clock frequency and hence the maximum useable signal

input frequency. Operation of any CML microcircuit without an active Xtal or clock input may

cause device damage. A clock pulse input is fed directly into this pin; Xtal/clock components

are not required.

Table 1 provides a guide to maximum usable Xtal/clock frequencies at pre-determined V

DD

values.

V

Max. Xtal/Clock

Freq. (MHz)

2.5

0.625

Table 1

3.0

1.0

5.0

2.5

V

and test purposes.

Output: (f

signal (see Figure 4).

There is a time delay between input and output signals (see Specifications).

V

Note that this device has two V

supply line. Do not attempt to draw current from either V

The choice of V

useable signal input frequency (see Figure 3).

No internal connection. Leave open-circuit.