RX − 8801 SA / JE
Page - 2 ETM26E-03
3. Terminal description
3.1. Terminal connections
RX − 8801 SA
1
T1 (CE) 14. N.C.
2
SCL 13. SDA
3
FOUT 12. T2 (VPP)
4
N.C. 11. GND
5
TEST 10. / INT
6
VDD 9. N.C.
7
FOE
8. N.C.
SOP − 14pin
RX − 8801 JE
1. /INT 20. N.C.
2. GND 19. N.C.
3. T2
(VPP) 18. N.C.
4. SDA 17. N.C.
5. N.C. 16. N.C.
6. T1 (CE) 15. N.C.
7. SCL 14. N.C.
8. FOUT 13. N.C.
9. N.C. 12. N.C.
10. FOE
# 1
# 10
# 20
# 11
11. V
DD
VSOJ − 20pin
3.2. Pin Functions
Signal
name
I/O Function
SCL Input This is the serial clock input pin for I
2
C Bus communications.
SDA I/O
This pin's signal is used for input and output of address, data, and ACK bits, synchronized
with the serial clock used for I
2
C communications.
Since the SDA pin is an N-ch open drain pin during output, be sure to connect a suitable
pull-up resistance relative to the signal line capacity.
FOUT Output
This is the C-MOS output pin with output control provided via the FOE pin.
When FOE = "H" (high level), this pin outputs a 32.768 kHz signal.
When output is stopped, the FOUT pin = "Hi-Z"( high impedance ).
FOE Input
This is an input pin used to control the output mode of the FOUT pin.
When this pin's level is high, the FOUT pin is in output mode. When it is low, output via the
FOUT pin is stopped.
/ INT Output
This pins is used to output alarm signals, timer signals, time update signals, and other
signals. This pin is an open drain pin.
TEST Input * Use by the manufacture for testing. ( Do not connect externally.)
T1 (CE) Input * Use by the manufacture for testing. ( Do not connect externally.)
T2 (VPP)
−
* Use by the manufacture for testing. ( Do not connect externally.)
VDD
−
This pin is connected to a positive power supply.
GND
−
This pin is connected to a ground.
N.C.
−
This pin is not connected to the internal IC.
Leave N.C. pins open or connect them to GND or V
DD.
Note: Be sure to connect a bypass capacitor rated at least 0.1 μF between VDD and GND.
