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參數(shù)資料
| 型號： | TDA8035HN/C1 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, 0.85 MM HEIGHT, PLASTIC, SOT617-7, HVQFN-32 |
| 文件頁數(shù)： | 6/32頁 |
| 文件大小： | 908K |
| 代理商： | TDA8035HN/C1 |
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TDA8035HN
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1.0 — 19 April 2011
14 of 32
NXP Semiconductors
TDA8035HN
Smart card interface
8.8 Deactivation sequence
When a session is completed, the micro-controller sets the CMDVCCN line to the HIGH
state. The circuit then executes an automatic deactivation sequence by counting the
sequencer back and ends in the inactive state (see Figure 9):
1. RST goes LOW (t11 = t10 + 3T/64)
2. CLK is stopped LOW (t12 =t11 +T/2)
3. I/O, AUX1 and AUX2 are pulled LOW (t13 =t11 + T)
4. VCC falls to zero (t14 =t11 + 3T/2) (The deactivation sequence is completed when VCC
reaches its inactive state)
5. VUP falls to zero (t15 =t11 + 7T/2)
6. VCC < 0.4 V (tde = t11 + 3T/2 + Vcc fall time)
7. All card contacts become low-impedance to GND (I/OUC, AUX1UC and AUX2UC
remain pulled up to VDD(INTF) via a 10 kΩ resistor).
8. The internal oscillator goes back to its lower frequency.
8.9 VCC regulator
VCC buffer is able to continuously deliver up to 65mA at Vcc = 5 V, 65 mA at Vcc = 3 V,
35 mA at Vcc =1.8 V .
It has an internal overload detection at approximately 125 mA.
This detection is internally filtered, allowing spurious current pulses of some ms up to
200 mA to be drawn by the card without causing a deactivation. (The average current
value must stay below maximum).
Fig 9.
Deactivation sequence
Oscint
CMDVCCN
RST
CLK
I/O
VCC
VUP
Xtal1
low frequency
high frequency
001aan753
t10
t11
t12
t13
t14
t15
T / 2
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