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參數(shù)資料
| 型號(hào)： | 73S8014BN-IL/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | ROHS COMPLIANT, SOP-20 |
| 文件頁數(shù)： | 8/29頁 |
| 文件大小： | 345K |
| 代理商： | 73S8014BN-IL/F |
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73S8014BN Data Sheet
DS_8014BN_057
16
Rev. 1.0
CMDVCC
5V/
#V
RSTIN
PRES
PWR_DOWN
OFF
This is a sequence of PRES events during the time when the host is requesting Power Down by setting
CMDVCC = 5V/#V = RSTIN = High. In such a
sequence, the circuit has to sense PRES and de-assert Power Down and time (de-bounce) the PRES signal, or assert the Power Down as appropriate.
5 - 7ms
When Power Down is de-asserted (RSTIN=Low), OFFB will go low
indicating circuit is not ready, and then go high after 5ms (if PRES is high)
2ms
5ms
Figure 4: Power-Down Mode and PRES Debounce
3.4
Power Supply and Voltage Supervision
The 73S8014BN smart card interface IC incorporates a low dropout (LDO) voltage regulator for VCC. The voltage
output is controlled by the digital input 5V/
3V of the 73S8014BN. This regulator can provide 1.8V, 3V, or 5V card
voltage from the power supply applied on the VPC pin. The voltage regulator can provide a current of at least
65mA on VCC for both 3V and 5V or 40mA for 1.8V that complies with EMV 4.0 and NDS specifications. An
overcurrent supervisor triggers a fault if the current on VCC exceeds the threshold at the given VCC voltage.
Digital circuitry is powered by the power supply applied on the VDD pin. VDD is sourced by 2.7 to 3.6V so the
system controller must operate with this supply level. A card deactivation sequence is forced upon fault of any
voltage or overcurrent supervisor. One voltage supervisor constantly monitors the VDD voltage. It is used to
initialize the ISO 7816-3 sequencer at power-on and to deactivate the card at power-off or upon fault. The voltage
threshold of the VDD voltage supervisor is internally set to 2.26V typical (VDDF). The other supervisor monitors the
VCC output voltage at the selected VCC voltage level. The maximum VCC voltage-fault threshold does not exceed
the minimum VCC voltage spec according to ISO 7816.
Note: Since the VDD and the VPC power supplies are separate, special care must be taken to ensure that the VPC
voltage is greater than 4.85V before beginning activating the card. In addition, VDD must be greater than the
threshold for VDD fault before card activation. When turning off power to the VDD and the VPC power supplies, the
card should be deactivated before shutdown or the VPC power supply must remain higher than 4.85V when the VDD
fault is detected and the emergency deactivation sequence is completed.
3.5
Card Power Supply
The 73S8014BN smart card interface IC incorporates an LDO voltage regulator for VCC. The voltage output is
controlled by the digital inputs 5V/
3V and CMDVCC of the 73S8014BN. This regulator can provide 1.8V, 3V, or 5V
card voltage from the power supply applied on the VPC pin. The voltage regulator can provide a current of at least
65mA on VCC for both 3V and 5V and 40mA for 1.8V that complies with EMV 4.2 and NDS specifications.
Note: When using VCC = 1.8V, a minimum load is required on VCC to ensure proper output regulator
stability. A 20k
resistor is required between V
CC and GND to meet this minimum load requirement. If VCC
= 1.8V is never used in a given application, the resistor is not required.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 73S8014BN-ILR/F | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Smart Card Interface |
| 73S8014R | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Smart Card Interface |
| 73S8014R-DB | 功能描述:界面開發(fā)工具 73S8014RRN/RT Demo Brd RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| 73S8014R-IL/F | 功能描述:I2C 接口集成電路 Smart Card Interface Comp w/8024 RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| 73S8014R-IL/F1 | 功能描述:輸入/輸出控制器接口集成電路 RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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