参数资料
型号: TXB0104DG4
厂商: Texas Instruments
文件页数: 2/30页
文件大小: 0K
描述: IC VOLT-LEVEL TRANSLATOR 14-SOIC
标准包装: 50
逻辑功能: 变换器,双向
位数: 4
输入类型: 逻辑
输出类型: 逻辑
数据速率: 100Mbps
通道数: 4
输出/通道数目: 1
差分 - 输入:输出: 无/无
传输延迟(最大): 4ns
电源电压: 1.2 V ~ 3.6 V,1.65 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOIC
包装: 管件
4k
4k
A
B
VCCA
VCCB
One
Shot
One
Shot
One
Shot
One
Shot
T1
T2
T3
T4
SCES650F – APRIL 2006 – REVISED MAY 2012
PRINCIPLES OF OPERATION
Applications
The TXB0104 can be used in level-translation applications for interfacing devices or systems operating at
different interface voltages with one another.
Architecture
The TXB0104 architecture (see Figure 1) does not require a direction-control signal to control the direction of
data flow from A to B or from B to A. In a dc state, the output drivers of the TXB0104 can maintain a high or low,
but are designed to be weak, so that they can be overdriven by an external driver when data on the bus starts
flowing the opposite direction.
The output one shots detect rising or falling edges on the A or B ports. During a rising edge, the one shot turns
on the PMOS transistors (T1, T3) for a short duration, which speeds up the low-to-high transition. Similarly,
during a falling edge, the one shot turns on the NMOS transistors (T2, T4) for a short duration, which speeds up
the high-to-low transition. The typical output impedance during output transition is 70
at VCCO = 1.2 V to 1.8 V,
50
at VCCO = 1.8 V to 3.3 V, and 40 at VCCO = 3.3 V to 5 V.
Figure 1. Architecture of TXB0104 I/O Cell
Input Driver Requirements
Typical IIN vs VIN characteristics of the TXB0104 are shown in Figure 2. For proper operation, the device driving
the data I/Os of the TXB0104 must have drive strength of at least ±2 mA.
10
Copyright 2006–2012, Texas Instruments Incorporated
Product Folder Links: TXB0104
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