Rtc - 4543 sa/sb – Epson RTC-4543SB User Manual
Page 7
RTC - 4543 SA/SB
Page - 4
MQ - 252 - 03
5-5. AC Characteristics
Unless specified otherwise: Ta = - 40 to +85
°
C, CL = 50 pF
Item Symbol
V
DD
=5 V
±
10 %
V
DD
=3 V
±
10 %
Unit
Min. Max. Min. Max.
CLK clock cycle
t
CLK
0.75 7800 1.5 7800
µ
s
CLK low pulse width
t
CLKL
0.375 3900 0.75 3900
µ
s
CLK high pulse width
t
CLKH
0.375 3900 0.75 3900
µ
s
CLK setup time
t
CLKS
25 50 ns
CE setup time
t
CES
0.375 3900 0.75 3900
µ
s
CE hold time
t
CEH
0.375 0.75
µ
s
CE enable time
t
CE
0.9 0.9
s
Write data setup time
t
SD
0.1 0.2
µ
s
Write data hold time
t
HD
0.1 0.1
µ
s
WR setup time
t
WRS
100 100 ns
WR hold time
t
WRH
100 100 ns
DATA output delay time
t
DATD
0.2 0.4
µ
s
DATA output floating time
t
DZ
0.1 0.2
µ
s
Clock input rise time
t
r1
50 100
ns
Clock input fall time
t
f1
50 100
ns
FOUT rise time (CL=30 pF)
t
r2
100 200
ns
FOUT fall time (CL=30 pF)
t
f2
100 200
ns
Disable time (CL=30 pF)
t
XZ
100 200
ns
Enable time (CL=30 pF)
t
ZX
100 200
ns
FOUT duty ratio (CL=30 pF)
Duty
40
60
40
60
%
Wait time
t
RCV
0.95 1.9
µ
s