Latch wont latch

Hi,
I am desigining a 64-ary QAM. While desiging,i encountered an unexpected problem in the latch.The problem is the latch wont latch.Since this is for study purpose,i am using low frequencies only.I am giving a clock frequency of 6.4KHz and the data rate is 19.2Kbps. Logic 1 is +5 Volt and Logic 0 is 0 Volt. When used under these condition,the latch is not working.I am using DM74LS374 latch.Can anybody please help me out?

Saju.

Please post a schematic.

That's funny. Every LS374 I've ever used was transparent when the latch enable signal was high and latched when latch enable was low. That is the only possible misinterpretation I can think of.

Another issue might lie in the fact that the 'LS374 is an octal d-type flip-flop, not an octal latch. The 'LS373 is an octal transparent latch. Both have tri-state outputs. Personally, I like the '573 and '574 for ease of PC board layout.
JB

Qam Ic

Finally, it worked. There was a problem with the clock. I want to know whether is there any IC's available particularly for QAM. If u know,please help me out.