Philips PTN3501 Datasheet page 2

Philips Semiconductors
Maintenance and control device
FEATURES
2
I C to parallel port expander
2
Internal 256x8 E PROM
Self timed write cycle (5 ms typ.)
16 byte page write operation
Controlled pull-up on address lines
Low voltage V range of +2.5 V to +3.6 V
CC
5 V – tolerant I/Os
Low standby current (< 60 A )
Power on Reset
Supports Live Insertion
Compatible with SMBus specification version 1.1
2
High E PROM endurance and data retention
Available in TSSOP20 package
DESCRIPTION
The PTN3501 is a general purpose maintenance and control device.
2
It features an on-board E PROM that can be used to store error
codes or board manufacturing data for read–back by application
software for diagnostic purposes.
The eight quasi bidirectional data pins can be independently
assigned as inputs or outputs to monitor board level status or
activate indicator devices such as LEDs.
The PTN3501 has six address pins allowing up to 64 devices to
2
share the common two wire I C software protocol serial data bus.
The PTN3501 supports live insertion to facilitate usage in removable
cards on backplane systems.
The PTN3501 is an alternative to the functionally similar PTN3500
for systems where a high number of devices are required to share
2
the same I C-bus without need for an additional I
expander.
ORDERING INFORMATION
Package
Type n mber Type number
Name
PTN3501DH TSSOP20
FUNCTIONAL DIAGRAM
2001 Jan 17
2
C-bus I/O
Description
Plastic thin shrink small-outline package; 20 leads; body width 4.4 mm
INT
SCL
2
I C
SDA
CONTROL
A5:0
E2PROM
WC
256 8
Figure 2.
PIN CONFIGURATION
1
A0
2
A1
A2 3
P0 4
P1 5
P2 6
P3 7
8
INT
A5 9
V 10
SS
PIN DESCRIPTION
PIN NUMBER SYMBOL
1,2,3,9,11,12 A0:5
4,5,6,7 P0:3
10 V
SS
13,14,15,16 P4:7
17 WC
8 INT
18 SCL
19 SDA
20 V
DD
8-BIT
I/O PORT
SW00647
2
Product specification
PTN3501
20
V
DD
19
SDA
18
SCL
17
WC
PTN3501
16 P7
15 P6
14
P5
13
P4
12
A3
11
A4
SW00657
Figure 1.
NAME AND FUNCTION
Address Lines
Quasi–bidirectional I/O pins
Ground
Quasi–bidirectional I/O pins
Write Control Pin. Should be
tied LOW.
Interrupt Pin
2
I C Serial Clock
2
I C Serial Data
Supply Voltage
Version
SOT360-1
P7:0
853-2227 25436