- 您现在的位置：买卖IC网 > PDF目录16576 > 73S8009C-32IMR/F (Maxim Integrated Products)IC PWR MGMT/SMART CARD INT 32QFN PDF资料下载
参数资料
| 型号： | 73S8009C-32IMR/F |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/32页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT/SMART CARD INT 32QFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 智能卡读取器，写入器 |
| 电源电压： | 2.7 V ~ 6.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
73S8009C Data Sheet
DS_8009C_025
3.2
Power Supply and Converter
The power supply and converter circuit takes power from any one of three sources; V PC , V BUS , and V BAT .
V PC is specified to range from 2.7 to 6.5 volts and would typically be supplied by a single cell battery with
a voltage range of 2.7 to approximately 3.1 volts. V PC is also appropriate for system supplies of 3.3 or 5
volts. V BUS is typically supplied by a connected USB cable and ranges in value from 4.5 to 5.5 volts
(6.5 V maximum). V BAT is expected to be supplied from a battery of two series connected cells with a
voltage value of 4.0 V to 6.5 V. V BAT and V BUS are connected to V PC by two FET switches configured as
an SPDT switch (break-before-make). They are not enabled at the same time. V BUS is automatically
selected in lieu of V BAT when V BUS is present. If V PC is provided and V BAT or V BUS are also used, the
source of V PC must be diode isolated from the V PC pin to prevent current flow from V BAT or V BUS into the
V PC source.
The power supplied to the V PC is up-converted to the voltage V P utilizing an inductive, step-up converter.
A series power inductor (nominal value = 10 μ H) is connected from V PC to LIN, and a 10 μ F filter capacitor
plus a 0.1 μ F capacitor must be connected to V PC . V P requires a 4.7 μ F filter capacitor and will have a
nominal value of 5.5 V during normal operation. V P is used by the smartcard interface circuits (CLK, RST,
IO, AUX1, and AUX2) and is the source of the regulated smart card supply V CC . V CC can be programmed
for values of 5 V, 3 V, and 1.8 V. V DD is also produced from V P . V DD is used by the 73S8009C circuit for
logic, input/output buffering, and analog functions as well as being capable of supplying up to 40 mA of
current to external devices. Figure 4 shows the block diagram of the 73S8009C.
3.3
Power ON/OFF
When no power is applied to the V BUS pin, a power ON/OFF function is provided such that the circuit will
be inoperative during the “OFF” state, consuming minimum current from V PC and V BAT . If V BUS power is
supplied, the functions of the ON/OFF switch and circuitry are overridden and the 73S8009C is in the
“ON” state with V P and V DD available. Without V BUS applied, and in the OFF state, the circuit responds
only to the ON_OFF pin. The ON_OFF pin shall be connected to a SPST switch to ground. If the circuit
is OFF and the switch is closed for a de-bounce period of 50-100ms, the circuit shall go into the “ON”
state wherein all functions are operating in normal fashion. If the circuit is in the “ON” state and the
ON_OFF pin is connected to ground for a period greater than the de-bounce period, OFF_REQ will be
asserted high and held. Typically, the OFF_REQ signal is presented to a host controller that will assert
OFF_ACK high when it has completed all shutdown activities. When OFF_ACK is set high, the circuit will
de-activate the smart card interface if required and turn off all analog functions and the V DD supply for the
logic and companion circuits. The OFF_ACK pin is connected internally to OFF_REQ with a resistor such
that if OFF_ACK is unconnected, the action of OFF_REQ will assert OFF_ACK high. In this
configuration, the circuit shall go into the “OFF” state immediately upon OFF_REQ = 1. The default state
upon application of power is the “OFF” state unless power is supplied to the V BUS supply. Note that at any
time, the controller may assert OFF_ACK and the 73S8009C will go into the “OFF” state (when V BUS is
not present.)
If power is applied to both V BAT and V BUS , the circuit will automatically consume power from only the V BUS
source. The circuit will be unconditionally “ON” when V BUS is applied. If the V BUS source is removed, the
circuit will switchover to the VBAT input supply and remain in the “ON” state. The controller circuit
firmware is required to assert OFF_ACK based on no activity or V BUS removal to reduce battery power
consumption. When operating from V BUS , and not calling for V CC , the step-up converter becomes a simple
switch connecting V BUS to V P in order to save power. This condition is appropriate for the USB
“SUSPEND” state. The USB “SUSPEND” state requires the power supply current to be less than 500 μ A.
In order to obtain and meet this low current limitation, the companion controller must be configured into a
power-down condition using less than 20 μ A from V DD .
Note: When using the VBUS input as the sole power source for an ‘always on’ configuration
(ON_OFF input not used), the OFF_ACK and ON_OFF inputs must be connected to ground.
18
Rev. 1.5
相关PDF资料 |
PDF描述 |
|---|---|
| ECM18DCTI-S288 | CONN EDGECARD 36POS .156 EXTEND |
| RCM12DCTI-S288 | CONN EDGECARD 24POS .156 EXTEND |
| V300C28E150BG | CONVERTER MOD DC/DC 28V 150W |
| GBM31DCBH-S189 | CONN EDGECARD 62POS R/A .156 SLD |
| VE-JWZ-EZ-S | CONVERTER MOD DC/DC 2V 10W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 73S8009C-DB | 功能描述:界面开发工具 73S8009C Demo Brd RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| 73S8009CN | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Combo ISO-7816 and USB Universal Smart Card Interface IC |
| 73S8009CN-32IM/F | 功能描述:输入/输出控制器接口集成电路 ISO7816 & USB Unvrsl Smart Card Interface RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| 73S8009CN-32IM/F1 | 功能描述:输入/输出控制器接口集成电路 RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| 73S8009CN-32IMR/F | 功能描述:输入/输出控制器接口集成电路 ISO7816 & USB Unvrsl Smart Card Interface RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
发布紧急采购，3分钟左右您将得到回复。