PCA9513A_PCA9514A_1

© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

Product data sheet

Rev. 01 — 11 October 2005

5 of 25

Philips Semiconductors

PCA9513A; PCA9514A

7.

Pinning information

7.1 Pinning

7.2 Pin description

8.

Functional description

Refer to Figure 1 “Block diagram of PCA9513A” and Figure 2 “Block diagram of

PCA9514A”.

8.1 Start-up

An undervoltage and initialization circuit holds the parts in a disconnected state which

presents high-impedance to all SDAn and SCLn pins during power-up. A LOW on the

essentially zero. As the power supply is brought up and the ENABLE is HIGH or the part is

powered and the ENABLE is taken from LOW to HIGH it enters an initialization state

where the internal references are stabilized and the 92

µA input pull-ups (on the

PCA9513A) is enabled. At the end of the initialization state the ‘Stop Bit And Bus Idle’

detect circuit is enabled. With the ENABLE pin HIGH long enough to complete the

Fig 3.

Pin configuration for SO8

Fig 4.

Pin configuration for TSSOP8

(MSOP8)

PCA9513AD

PCA9514AD

ENABLE

SCLOUT

SDAOUT

SCLIN

SDAIN

GND

READY

002aab676

1

2

3

4

6

5

8

7

PCA9513ADP

PCA9514ADP

ENABLE

SCLOUT

SDAOUT

SCLIN

SDAIN

GND

READY

002aab677

1

2

3

4

6

5

8

7

Table 3:

Pin description

Symbol

Pin

Description

ENABLE

1

Chip enable. Grounding this input puts the part in a Low current (< 1

µA)

mode. It also disables the rise time accelerators, isolates SDAIN from

SDAOUT and isolates SCLIN from SCLOUT.

SCLOUT

2

serial clock output to and from the SCL bus on the card

SCLIN

3

serial clock input to and from the SCL bus on the backplane

GND

4

Ground. Connect this pin to a ground plane for best results.

READY

5

open-drain output which pulls LOW when SDAIN and SCLIN are

disconnected from SDAOUT and SCLOUT, and goes HIGH when the two

sides are connected

SDAIN

6

serial data input to and from the SDA bus on the backplane

SDAOUT

7

serial data output to and from the SDA bus on the card

8

power supply