tda8034at NXP Semiconductors, tda8034at Datasheet - Page 12
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tda8034at
Manufacturer Part Number
tda8034at
Description
Smart Card Interface
Manufacturer
NXP Semiconductors
Datasheet
1.TDA8034AT.pdf
(29 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
tda8034at/C1
Manufacturer:
NXP/恩智浦
Quantity:
20 000
NXP Semiconductors
TDA8034T_TDA8034AT_1
Product data sheet
Fig 9.
(1) Deactivation caused by card withdrawal.
(2) Deactivation caused by short-circuit.
Operation of debounce feature with pins OFFN, CMDVCCN, PRESN and V
CMDVCCN
8.10 Automatic determining of card supply voltage
PRESN
OFFN
V
CC
The supply voltage (V
the duration of the HIGH state (logic 1) on pin CMDVCCN before the activation command
(CMDVCCN falling edge) occurs. If pin CMDVCCN stays HIGH for more than 30 ms,
activation occurs with V
activation occurs with V
To activate the card at V
going LOW (logic 0).
To activate the card at V
going LOW (logic 0).
If pin CMDVCCN is HIGH for more than 15 ms (t0 > 15 ms) but less than 30 ms, pin
CMDVCCN must be set LOW for t1 (200 s < t1 < 700 s), and then HIGH for t2
(200 s < t2 < 15 ms) before going LOW.
Fig 10. Card activation, V
Fig 11. Card activation, V
CMDVCCN
CMDVCCN
t
deb
CC
Rev. 01 — 5 February 2010
V
V
CC
CC
CC
CC
) that the card requires is determined automatically by monitoring
CC
CC
set to 5 V. If pin CMDVCCN stays HIGH for less than 15 ms,
set to 3 V.
CC
CC
= 5 V, pin CMDVCCN must stay HIGH for t0 > 30 ms before
= 3 V, pin CMDVCCN must stay HIGH for t0 < 15 ms before
3 V or 5 V
3 V or 5 V
= 5 V, t0 > 30 ms
= 3 V, t0 < 15 ms
(1)
TDA8034T; TDA8034AT
t0
t0
t
deb
CC
5 V
3 V
001aak998
001aak999
(2)
Smart card interface
001aal411
© NXP B.V. 2010. All rights reserved.
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