Replacement for SN49710P

[steve_rb]

I have an old circuit uses SN49710P but now it needs replacement. This chip converts 10MHZ to 1MHZ (a 10:1 reducer). It is a 8 pin chip. I couldn't find it in the market. Anyone knows what chip can be a proper replacement?

 

[FvM]

I presume that a 7490 and it's derivatives (LS, HC series) can be used.

 

[steve_rb]

I presume that a 7490 and it's derivatives (LS, HC series) can be used.

Could you please specify a few LS and HC series of derivatives of 7490? I am not familiar with digital chips.

 

[FvM]

I mean e.g. 74HC90. It's a 2:1 and 5:1 divider in a 14 pin package. Wired respectively, it becomes a 10:1 divider with 50% output duty cycle.

 

[steve_rb]

Found only one page 7490 datasheet which says it is a divider but 74HC90 and 74LS90 seems are not dividers? Do you have datasheet for these? I want to make a 2MHZ from 10MHZ oscillator output.

 

[FvM]

All 74xx90 devices are functional equivalent with same pinning, different in supply voltage range, current consumption and speed. They are actually decade counters that can be also used as 5:1 and 10:1 dividers. 74LS90 is a least an active part and available from distributors.