Rainbow Electronics DS1302 - Manual (Page 11)

DS1302
11 of 15
Trickle Charge Resistors
R1
R2
R3
2
4
8
kΩ
kΩ
kΩ
Trickle Charge Diode Voltage Drop V
TD
0.7 V
*Unless otherwise specified.
CAPACITANCE (T
A
= 25ºC)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
I
10 pF
I/O Capacitance C
I/O
15 pF
Crystal Capacitance C
X
6 pF
AC ELECTRICAL CHARACTERISTICS
(Over the operating range*)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
V
CC
= 2.0V 200
Data to CLK Setup t
DC V
CC
= 5V 50
ns 4
V
CC
= 2.0V 280
CLK to Data Hold t
CDH
V
CC
= 5V 70
ns 4
V
CC
= 2.0V 800
CLK to Data Delay t
CDD V
CC
= 5V 200
ns 4,5,6
V
CC
= 2.0V 1000
CLK Low Time t
CL
V
CC
= 5V 250
ns 4
V
CC
= 2.0V 1000
CLK High Time t
CH V
CC
= 5V 250
ns 4
V
CC
= 2.0V 0.5
CLK Frequency t
CLK V
CC
= 5V DC 2.0
MHz 4
V
CC
= 2.0V 2000
CLK Rise and Fall t
R
, t
F V
CC
= 5V 500
ns 4
V
CC
= 2.0V 4
RST to CLK Setup t
CC V
CC
= 5V 1
ms 4
V
CC
= 2.0V 240
CLK to RST Hold t
CCH
V
CC
= 5V 60
ns 4
V
CC
= 2.0V 4
RST Inactive Time t
CWH V
CC
= 5V 1
ms 4
V
CC
= 2.0V 280
RST to I/O High-Z t
CDZ
V
CC
= 5V 70
ns 4
V
CC
= 2.0V 280
SCLK to I/O High-Z t
CCZ V
CC
= 5V 70
ns 4
*Unless otherwise specified.