1996 Nov 21

16

Philips Semiconductors

Product specification

DTMF/modem/musical-tone generators

PCD3311C; PCD3312C

Table 7

Explanation of time symbols used in Fig.13

9

HANDLING

Inputs and outputs are protected against electrostatic discharge in normal handling. However, it is good practice to take

normal precautions appropriate to handling MOS devices (see

“Handbook IC03, Section: General, Handling MOS

devices”).

SYMBOL

PARAMETER

REMARKS

MIN.

MAX.

UNIT

SCL clock frequency

0

2

kHz

tolerable pulse spike width

−

100

ns

bus free time

The time that the bus is free (SDA is

HIGH) before a new transmission is

initiated by SDA going LOW.

105

−µs

set-up time repeated START

Only valid for repeated start code.

105

155

µs

hold time START condition

The time between SDA going LOW and

the first valid negative-going transition of

SCL.

365

415

µs

SCL LOW time

The LOW period of the SCL clock.

105

155

µs

SCL HIGH time

The HIGH period of the SCL clock.

365

−µs

rise time SDA and SCL

−

1.0

µs

fall time SDA and SCL

−

0.3

µs

data set-up time

250

−

ns

data hold time

0

−

ns

set-up time STOP condition

105

155

µs