Rainbow Electronics DS1302 - Manual (Page 10)

DS1302
041697 10/12
AC ELECTRICAL CHARACTERISTICS (cont’d) (0 ° C to 70 ° C; V
CC
= +5V ± 10%*)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CLK to RST Hold t
CCH
V
CC
=2.5V 240
ns 7 CLK to RST Hold t
CCH
V
CC
=5V 60
ns 7
RST Inactive Time t
CWH
V
CC
=2.5V 4
µ s 7 RST Inactive Time t
CWH
V
CC
=5V 1
µ s 7
RST to I/O High Z t
CDZ
V
CC
=2.5V 280
ns 7 RST to I/O High Z t
CDZ
V
CC
=5V 70
ns 7
SCLK to I/O High Z t
CCZ
V
CC
=2.5V 280
ns 7 SCLK to I/O High Z t
CCZ
V
CC
=5V 70
ns 7
*Unless otherwise noted.
TIMING DIAGRAM: READ DATA TRANSFER Figure 5
t CC
t CDD
t CCZ
t CDH
t DC
0 1 7
RST
SCLK
I/O
WRITE COMMAND BYTE READ DATA BIT
0 1
t CDD
t CDZ
TIMING DIAGRAM: WRITE DATA TRANSFER Figure 6
t CC
0 1
RST
SCLK
I/O 7
t CWH
t CCH
t CDH
t DC
t F
t R
t CH
t CL
WRITE COMMAND BYTE WRITE DATA
0