SN74LVC126A-Q1: could this device meet 4Mbps for SPI protocol?

Nan Zhang

Intellectual 1890 points

Part Number: SN74LVC126A-Q1
Other Parts Discussed in Thread: SN74LVC125A-Q1

Hi team,

Here is request from my customer shown below. I want to recommend the SN74LVC126A-Q1.

Could you please confirm following questions:

1.Do you have better recommend based on the request and price?

2. Whether the SN74LVC126A-Q1 bandwidth is greater than or equal to 4Mbps？

3. what are the differences between SN74LVC126A-Q1 and SN74LVC125A-Q1?

输入通道数[Num. of Input channels]	4
输出通道数[Num. of Output channels]	4
三态输出[Tristate Output]	Yes
使能控制[Enable Control]	Yes，high level active
输入电平标准[Input Voltage Level]	CMOS
输出电平标准[Output Voltage Level]	CMOS
最小供电电压[VDD(Min.)]	1.65V
最大供电电压[VDD(Max.)]	3.75V
其他特性[Other Features]	For SPI communication, the bandwidth is greater than 4Mbps
最低工作温度[Ta(Min.)]	-40℃
最高工作温度[Ta(Max.)]	125℃
制造等级[Product Grade]	Auto

YOURS

NAN

over 1 year ago

+1 Clemens Ladisch over 1 year ago

Guru 259530 points

The maximum recommended supply voltage is 3.6 V. (The absolute maximum rating is 6.5 V.) For a nominal 3.3 V supply, this is usually not a problem.

1. This LVC device is the only four-channel automotive buffer.

2. Even at 1.8 V, LVC supports up to 80 MHz.

3. The only difference is the polarity of the enable input. These requirements demand the '126.

0 Nan Zhang over 1 year ago in reply to Clemens Ladisch

TI__Intellectual 1890 points

Hi Clemens,

Thanks for your reply. I have recommended 126 to the customers. But they wanted to know what would happened to 126 when the input voltage was beyond the recommend voltage but within absolute max voltage. Could you please confirm this question?

YOURS

NAN

+1 Emrys Maier over 1 year ago in reply to Nan Zhang

TI__Guru* 96681 points

Hi NAN,

We only test for reliability within the recommended operating conditions:

As long as the supply is between 1.65V and 3.6V, and the input voltage is between 0V and 5.5V, then the device will have reliability as listed. Beyond this operating range TI makes no guarantees.

0 Nan Zhang over 1 year ago in reply to Emrys Maier

TI__Intellectual 1890 points

Hi Emrys,

Thanks for your clear reply.

YOURS

NAN

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SN74LVC126A-Q1: could this device meet 4Mbps for SPI protocol?