fs7755 Fortune Semiconductor Corporation, fs7755 Datasheet - Page 9

• Manufacturer Part Number: fs7755
• Description: Energy Metering Ic With Impulse Output
• Manufacturer: Fortune Semiconductor Corporation

11. Timing Characteristics1, 2
(
= –40℃ to +85℃.)
Note:
1
2
3
4
Specifications subject to change without notice.
Rev. 1.0
Sample tested during initial release and after any redesign or process changes that may affect this parameter.
See Fig4.
The pulse widths of F1, F2, and CF are not fixed for higher output frequencies. See Frequency Outputs section.
The CF pulse is always 18μs in the high frequency mode. See Frequency Outputs section and Table Ⅳ.
AV
Parameter
DD
t
4
= DV
t
t
t
t
t
1
3, 4
2
3
5
6
3
CF
F2
F1
DD
= 5V±5%, AGND = DGND = 0V, On-Chip Reference, CLKIN = 3.579545MHz, T
Specifications
See Table Ⅲ
See Table Ⅳ
CLKIN/4
t
4
1/2 t
275
t
90
1
2
t
3
Fig4 Timing Characteristics for Impulse Output
t
6
Unit
sec
sec
sec
sec
ms
ms
t
5
t
2
F1 and F2 Pulse width (Logic Low)
Output Pulse Period. See Transfer Function section.
Time between F1 Falling Edge and F2 Falling Edge.
CF Pulse Width (Logic High).
CF Pulse Period. See Transfer Function section.
Minimum Time between F1 and F2 Pulse.
Test Conditions/Comments
min
FS7755
to T
9/22
max