TDA8024T/C1,118 NXP Semiconductors, TDA8024T/C1,118 Datasheet - Page 8

• Manufacturer Part Number: TDA8024T/C1,118
• Description: IC SMART CARD INTERFACE 28-SOIC
• Manufacturer: NXP Semiconductors

Specifications of TDA8024T/C1,118

• Package / Case: 28-SOIC (7.5mm Width)
• Controller Type: Smart Card Interface
• Interface: Analog
• Voltage - Supply: 2.7 V ~ 6.5 V
• Current - Supply: 1.5mA
• Operating Temperature: -25°C ~ 85°C
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935271342118; TDA8024TD-T; TDA8024TD-T

Philips Semiconductors
8
Throughout this document it is assumed that the reader is
familiar with ISO7816 terminology.
8.1
The supply pins for the IC are V
be in the range of 2.7 to 6.5 V. All signals interfacing with
the system controller are referred to V
should also supply the system controller. All card reader
contacts remain inactive during power-on or power-off.
The internal circuits are maintained in the reset state until
V
internal Power-on reset pulse, t
falls below V
is performed.
A DC/DC converter is incorporated to generate the
5 or 3 V card supply voltage (V
should be supplied separately by V
the possibility of large transient currents, the two 100 nF
capacitors of the DC/DC converter should be located as
near as possible to the IC and have an ESR less than
100 m .
The DC/DC converter functions as a voltage doubler or a
voltage follower according to the respective values of V
and V
100 mV).
2004 July 12
handbook, full pagewidth
DD
IC card interface
FUNCTIONAL DESCRIPTION
reaches V
DDP
(internal signal)
Power supply
(both have thresholds with a hysteresis of
ALARM
th2
V DD
th2
, an automatic deactivation of the contacts
+ V
hys2
and for the duration of the
power-on
CC
W
DD
). The DC/DC converter
(see Fig.5). When V
DDP
and GND. V
t w
DD
and PGND. Due to
, therefore V
Fig.5 Voltage supervisor.
DD
should
DD
supply dropout
DD
CC
8
The DC/DC converter function changes as follows:
Supply voltages V
any sequence.
After powering the device, OFF remains LOW until
CMDVCC is set HIGH.
During power off, OFF falls LOW when V
falling threshold voltage.
8.2
8.2.1
The voltage supervisor surveys the V
reset pulse of approximately 8 ms (t
keep the IC inactive during power-on or power-off of the
V
As long as V
inactive whatever the levels on the command lines. This
state also lasts for the duration of t
a level higher than V
When V
contacts is performed.
t w
DD
V
V
V
V
CC
CC
CC
CC
supply (see Fig.5).
= 5 V and V
= 5 V and V
= 3 V and V
= 3 V and V
Voltage supervisor
DD
W
(
OR WITH
falls below V
ITHOUT EXTERNAL DIVIDER ON PIN
DD
is less than V
DD
TDA8024AT)
DDP
DDP
DDP
DDP
th2
and V
> 5.8 V; voltage follower
< 5.7 V; voltage doubler
> 4.1 V; voltage follower
< 4.0 V; voltage doubler.
th2
+ V
, a deactivation sequence of the
DDP
hys2
power-off
th2
.
may be applied to the IC in
+ V
W
MDB053
W
after V
hys2
Product specification
DD
) is used internally to
, the IC remains
V th2 V hys2
V th2
supply. A defined
TDA8024
DD
DD
PORADJ
is below the
has reached