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DS1305EN

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DS1305
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SPI AC ELECTRICAL CHARACTERISTICS
(Over the operating range, unless otherwise specified.) (Figure 12 and Figure 13)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
V
CC
= 2.0V 200
Data to CLK Setup t
DC
V
CC
= 5V 50
ns 5,6
V
CC
= 2.0V 280
CLK to Data Hold t
CDH
V
CC
= 5V 70
ns 5,6
V
CC
= 2.0V 800
CLK to Data Delay t
CDD
V
CC
= 5V 200
ns 5,6,7
V
CC
= 2.0V 1000
CLK Low Time t
CL
V
CC
= 5V 250
ns 6
V
CC
= 2.0V 1000
CLK High Time t
CH
V
CC
= 5V 250
ns 6
V
CC
= 2.0V 0.6
CLK Frequency t
CLK
V
CC
= 5V DC 2.0
MHz 6
V
CC
= 2.0V 2000
CLK Rise and Fall t
R,
t
F
V
CC
= 5V 500
ns
V
CC
= 2.0V 4
CE to CLK Setup t
CC
V
CC
= 5V 1
s 6
V
CC
= 2.0V 240
CLK to CE Hold t
CCH
V
CC
= 5V 60
ns 6
V
CC
= 2.0V 4
CE Inactive Time t
CWH
V
CC
= 5V 1
s 6
V
CC
= 2.0V 280
CE to Output High-Z t
CDZ
V
CC
= 5V 70
ns 5,6
DS1305
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Figure 12. TIMING DIAGRAM: SPI READ DATA TRANSFER
Figure 13. TIMING DIAGRAM: SPI WRITE DATA TRANSFER
* SCLK CAN BE EITHER POLARITY, TIMING SHOWN FOR CPOL = 1.
* SCLK CAN BE EITHER POLARITY, TIMING SHOWN FOR CPOL = 1.
SERMODE = V
CC
SERMODE = V
CC
DS1305
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NOTES:
1) I
CC1T
and I
CC2T
are specified with CE set to a logic 0 and EOSC bit = 0 (oscillator enabled).
2) I
CC1A
and I
CC2A
are specified with CE = V
CC
, SCLK=2MHz at V
CC
= 5V; SCLK = 500kHz
at V
CC
= 2.0V, V
IL
= 0V, V
IH
= V
CC
, and EOSC bit = 0 (oscillator enabled).
3) Measured at V
IH
= 2.0V or V
IL
= 0.8V and 10ms maximum rise and fall time.
4) Measured with 50pF load.
5) Measured at V
OH
= 2.4V or V
OL
= 0.4V.
6) I
CC1S
and I
CC2S
are specified with CE set to a logic 0. The EOSC bit must be set to logic 1
(oscillator disabled).
7) V
CC
= V
CC1
, when V
CC1
> V
CC2
+ 0.2V (typical); V
CC
= V
CC2
, when V
CC2
> V
CC1
.
8) V
CC2
= 0V.
9) V
CC1
= 0V.
10) V
CC1
< V
BAT.
11) V
CCIF
must be less than or equal to the largest of V
CC1
, V
CC2
, and V
BAT
.
12) Using a crystal on X1 and X2, rated for 6pF load.
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DS1305EN

Mfr. #:
Buy DS1305EN
Manufacturer:
Maxim Integrated
Description:
Real Time Clock Serial Alarm RTC 3-Wire
Lifecycle:
New from this manufacturer.
Delivery:
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