tda8035hn NXP Semiconductors, tda8035hn Datasheet - Page 7

• Manufacturer Part Number: tda8035hn
• Description: Smart Card Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
TDA8035HN
Product data sheet
8.1 Power Supply
Remark: Throughout this document the ISO 7816 terminology conventions have been
adhered to and it is assumed that the reader is familiar with these.
Power supply voltage V
All interface signals with the system controller are referenced to V
contacts remain inactive during powering up or powering down.
Internal regulator VREG should be in the range of 1.8 V
After powering the device, OFFN remains Low until CMDVCCN is set High and PRESN is
Low .
During power off, OFFN falls Low when V
The frequency of the internal oscillator Foscint used for the activation sequences is put in
low frequency mode in order to save power consumption as long as CMDVCCN is kept at
high level (card not activated).
This device includes DC/DC converter to generate the 5 V, 3 V or 1.8 V card supply
voltage (Vcc). The DC/DC converter should be supplied separately by Vddp and Gndp.
The DC/DC converter operates as a voltage tripler, doubler or follower according to the
respective values of Vcc and Vddp.
The operating mode is as follows (see
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Vcc = 5 V & Vddp > 3.8 V ; voltage doubler
Vcc = 5 V & Vddp < 3.6 V; voltage tripler
Vcc = 3 V & Vddp > 3.8 V; voltage follower
Vcc = 3 V & Vddp < 3.6 V; voltage doubler
Vcc = 1.8 V & Vddp > 3.8 V; voltage doubler
Vcc = 1.8 V & Vddp < 3.6 V; voltage tripler
All information provided in this document is subject to legal disclaimers.
Rev. 1.0 — 19 April 2011
DDP
should be in the range from 2.7 to 5.5 V
Figure
DDP
is below the threshold voltage falling.
3):
TDA8035HN
DD(INTF)
Smart card interface
© NXP B.V. 2011. All rights reserved.
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