DS32C35 Maxim Integrated Products, Inc., DS32C35 Datasheet - Page 20

• Manufacturer Part Number: DS32C35
• Description: Accurate I2c Rtc With Integrated Tcxo/crystal/fram
• Manufacturer: Maxim Integrated Products, Inc.

Accurate I
TCXO/Crystal/FRAM
Figure 6. Data Read—DS32B35 FRAM Slave Transmitter Mode
Figure 7. Data Write—DS32C35 FRAM Slave Receiver Mode
Figure 8. Data Read—DS32C35 FRAM Slave Transmitter Mode
The DS32B35/DS32C35 package contains a quartz tun-
ing-fork crystal. Pick-and-place equipment can be
used, but precautions should be taken to ensure that
excessive shocks are avoided. Ultrasonic cleaning
should be avoided to prevent damage to the crystal.
Avoid running signal traces under the package, unless
a ground plane is placed between the package and
the signal line. All N.C. (no connection) pins must be
connected to ground.
20
____________________________________________________________________
S - START
A - ACKNOWLEDGE
P - STOP
A - NOT ACKNOWLEDGE
R/W - READ/WRITE OR DIRECTION BIT ADDRESS = D1H
S - START
A - ACKNOWLEDGE
P - STOP
R/W - READ/WRITE BIT
S - START
A - ACKNOWLEDGE
P - STOP
A - NOT ACKNOWLEDGE
R/W - READ/WRITE OR DIRECTION BIT ADDRESS = D1H
S
S
S
<SLAVE ADDRESS> <R/W>
<SLAVE ADDRESS> <R/W>
Handling, PCB Layout, and
<SLAVE ADDRESS> <R/W>
1010A
1010000
1010000
10
A
9
A
8
1
2
1
0
C RTC with Integrated
A
A
A
XXXA
MASTER TO SLAVE
MASTER TO SLAVE
<DATA (n)>
MASTER TO SLAVE
<DATA (n)>
XXXXXXXX
XXXXXXXX
12
A
11
Assembly
A
10
<WORD ADDRESS>
A
9
A
8
A
A
A
A
<DATA (n + 1)>
<DATA (n + 1)>
SLAVE TO MASTER
SLAVE TO MASTER
7
SLAVE TO MASTER
XXXXXXXX
A
XXXXXXXX
6
A
5
A
4
A
2
A
1
A
NOTE: LAST DATA BYTE IS FOLLOWED BY A NOT ACKNOWLEDGE (A) SIGNAL.
0
Moisture-sensitive packages are shipped from the fac-
tory dry packed. Handling instructions listed on the
package label must be followed to prevent damage
during reflow. Refer to the IPC/JEDEC J-STD-020 stan-
dard for moisture-sensitive device (MSD) classifications
and reflow profiles. Exposure to reflow is limited to 2x
maximum.
NOTE: LAST DATA BYTE IS FOLLOWED BY A NOT ACKNOWLEDGE (A) SIGNAL.
A
A
A
<DATA (n + 2)>
<DATA (n)>
<DATA (n + 2)>
XXXXXXXX
XXXXXXXX
XXXXXXXX
(X + 1 BYTES + ACKNOWLEDGE)
(X + 1 BYTES + ACKNOWLEDGE)
(X + 1 BYTES + ACKNOWLEDGE)
DATA TRANSFERRED
DATA TRANSFERRED
DATA TRANSFERRED
A
A
A
...
...
...
<DATA (n + 1)>
<DATA (n + X)>
<DATA (n + X)>
XXXXXXXX
XXXXXXXX
XXXXXXXX
A
A
A
P
P
P