Datasheet

2004 July 12 5
Philips Semiconductors Product specification
IC card interface TDA8024
6 BLOCK DIAGRAM
mdb051
100 nF
100 nF
100 nF
100 nF
100 nF 100 nF
I/O
TRANSCEIVER
I/O
TRANSCEIVER
I/O
TRANSCEIVER
THERMAL
PROTECTION
V
CC
GENERATOR
RST
BUFFER
CLOCK
BUFFER
SEQUENCER
CLOCK
CIRCUITRY
OSCILLATOR
HORSEQ
INTERNAL OSCILLATOR
2.5 MHz
DC/DC CONVERTER
INTERNAL
REFERENCE
VOLTAGE SENSE
SUPPLY
EN2
PV
CC
EN5
EN4
EN3
CLK
EN1 CLKUP
ALARM
V
ref
21
V
DD
6
V
DDP
75
S1 S2
8
4
PGND
V
UP
17
V
CC
16
14
RST
CGND
PRES
10
9
PRES
15
CLK
13
12
11
AUX1
AUX2
I/O
22
GND
26
28
27
I/OUC
AUX2UC
AUX1UC
25
24
2
1
3
19
20
23
18
(1)
XTAL2
XTAL1
CLKDIV2
CLKDIV1
5V/3V
CMDVCC
RSTIN
OFF
TDA8024
POWER_ON
V
DD
R1
R2
PORADJ
Fig.1 Block diagram.
(1) Optional external resistor bridge. If this bridge is not required pin 18 should be connected to ground; see Section 8.2.2. Pin 18 is not connected
in the TDA8024AT.