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参数资料
| 型号： | DS8023-RJX+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/17页 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE SMART CARD 28-TSSOP |
| 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 |
| 接口： | 模拟 |
| 电源电压： | 2.7 V ~ 6 V |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
| 配用： | DS8023-KIT-ND - EVALUATION KIT FOR DS8023 |
DS8023
Smart Card Interface
7
Maxim Integrated
Detailed Description
The DS8023 is an analog front-end for communicating
with 1.8V, 3V, and 5V smart cards. Using an integrated
charge pump, the DS8023 can operate from a single
input voltage. The device translates all communication
lines to the correct voltage level and provides power for
smart card operation. It can operate from a wide input
voltage range (3.0V to 6.0V) and provides an extremely
low-power stop mode, consuming only 10nA while in
stop mode. The DS8023 is very compatible with the
NXP TDA8024. Many applications can upgrade with
very minor hardware changes, and only need to add
support in software to activate the ultra-low-power stop
mode. (Note that the PORADJ pin is not present in the
DS8023. It is replaced by the 1_8V selection pin.)
Power Supply
The DS8023 can operate from a single supply or a dual
supply. The supply pins for the device are VDD, GND,
VDDA, and PGND. VDD should be in the 2.7V to 6.0V
range, and is the supply for signals that interface with
the host controller. It should, therefore, be the same
supply as used by the host controller. All smart card
contacts remain inactive during power on or power off.
The internal circuits are kept in the reset state until VDD
reaches VTH2 + VHYS2 and for the duration of the inter-
nal power-on reset pulse, tW. A deactivation sequence
is executed when VDD falls below VTH2.
An internal charge pump and regulator generate the
3V or 5V card supply voltage (VCC). The charge pump
and regulator are supplied by VDDA and PGND. VDDA
should be connected to a minimum 3.0V (maximum
6.0V) supply and should be at a potential that is equal
to or higher than VDD.
The charge pump operates in a 1x (voltage follower) or
2x (voltage doubler) mode depending on the input
VDDA and the selected card voltage (5V or 3V).
For 5V cards, the DS8023 operates in a 1x mode
for VDDA > 5.8V and in a 2x mode for VDDA < 5.8V.
For 3V cards, the DS8023 operates in a 1x mode
for VDDA > 4.1V and in a 2x mode for VDDA < 4.1V.
For 1.8V cards, the DS8023 operates in a 1x mode
for VDDA > 2.9V and in a 2x mode for VDDA < 2.9V.
Voltage Supervisor
The voltage supervisor monitors the VDD supply. A
220s reset pulse (tW) is used internally to keep the
device inactive during power on or power off of the VDD
supply. See Figure 2.
TEMPERATURE
MONITOR
CARD VOLTAGE
GENERATOR
AND
CHARGE PUMP
CLOCK
GENERATION
CONTROL
SEQUENCER
POWER-SUPPLY
SUPERVISOR
I/O TRANSCEIVER
VDD
GND
VDDA
PGND
CP1
CP2
VUP
VCC
XTAL1
XTAL2
CLKDIV1
CLKDIV2
1_8V
5V/3V
CMDVCC
RSTIN
CGND
RST
CLK
I/O
AUX1
AUX2
OFF
PRES
I/OIN
AUX1IN
AUX2IN
DS8023
Figure 1. Functional Diagram
VDD
ALARM
(INTERNAL SIGNAL)
POWER ON
tW
POWER OFF
VTH2 + VHYS2
VTH2
SUPPLY DROPOUT
Figure 2. Voltage Supervisor Behavior
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS8023-RRX+ | 功能描述:接口 - 专用 Smart Card Interface RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS8023-RRX+T&R | 制造商:Maxim Integrated Products 功能描述:DS8023 SMART CARD INT 28 SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC INTERFACE SMART CARD 28-SOIC |
| DS8023-RRX+T&R | 功能描述:接口 - 专用 Smart Card Interface RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS8024 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:智能卡接口 |
| DS8024_V3 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Smart Card Interface |
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