ZL49010/11, ZL49020/21, ZL49030/31

Data Sheet

6

Zarlink Semiconductor Inc.

Table 4 - Call Progress Tones

Oscillator

The ZL4902x/4903x can be used in both external clock or two pin oscillator mode. In two pin oscillator mode, the

oscillator circuit is completed by connecting either a 3.579 MHz crystal or ceramic resonator across OSC1 and

OSC2 pins. It is also possible to configure a number of these devices (4 maximum) employing only a single

oscillator crystal. The OSC2 output of the first device in the chain is connected to the OSC1 input of the next device.

Subsequent devices are connected similarly. The oscillator circuit can also be driven by an 3.579 MHz external

clock applied on pin OSC 1. The OSC2 pin should be left open.

For ZL4901x devices, the CLK input is driven directly by an 3.579 MHz external digital clock.

Frequency 1 (Hz)

Frequency 2 (Hz)

On/Off

Description

350

440

continuous

North American Dial Tones

425

---

continuous

European Dial Tones

400

---

continuous

Far East Dial Tones

480

620

0.5s/0.5s

North American Line Busy

440

---

0.5s/0.5s

Japanese Line Busy

480

620

0.25s/0.25s

North American Reorder Tones

440

480

2.0s/4.0s

North American Audible Ringing

480

620

0.25s/0.25s

North American Reorder Tones