SM9501B
Radio Controlled Clock Receiver IC
OVERVIEW
*1
:
Radio controlled clock
FEATURES
I
I
I
I
I
I
PINOUT
(Top view)
ina
VDDA
IN1
IN3
IN2
1
I
I
I
I
Operating supply voltage range: 4.5 to 5.5V
Operating current consumption: 55µA (typ) @5V
Standby current consumption: 0.1µA (max) @5V
High sensitivity: 0.5µVrms input
Wide frequency range (35kHz to 80kHz)
Include analog switch for antennatuning capaci-
tors change
AGC gain hold function
External crystal filter connection
BiCMOS process
Package:16-pin VSOP
ORDERING INFORMATION
Device
SM9501BV
lim
Package
16-pin VSOP
PACKAGE DIMENSIONS
(Unit: mm)
+0
0.15
−
.1
0.05
4.4 ± 0.2
pre
6.4 ± 0.2
0.275TYP
5.1 ± 0.2
1.15 ± 0.1
0 to 10 °
0.10
+ 0.1
0.22
−
0.05
0.12 M
SEIKO NPC CORPORATION —1
0.10 ± 0.05
0.65
0.5 ± 0.2
ry
16
The SM9501B is a BiCMOS RCC
*1
receiver IC. It accepts low frequency standard wave input received from
an external antenna, amplifies it, detects the data signal, and outputs a digital time code signal.
VDD
PON
OUT
VSS
HLDN
CP
CB
LF
FCN
XO
VSSA
XI
8
9
SM9501B
BLOCK DIAGRAM
PON
OUT
VSS HLDN CP
CB
VDD
VDDA
Bias
IN1
AGC Amp
IN3
IN2
FCN
XO VSSA XI
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
Name
lim
I/O
1
−
I
I
I
A/D
2
A
IN1
IN3
IN2
A
A
A
Ipu
O
−
I
D
A
XO
A
XI
A
LF
O
A
CB
CP
O
O
A
A
Ipu
−
D
A
VSS
O
D
Ipu
−
D
A
(+) supply input
TN
Ipu
D
VDDA
FCN
pre
10
11
12
HLDN
13
14
15
OUT
PON
VDD
16
−
1. I: input, O: output, Ipu: input with pull-up resistor, –: supply pin
2. A: analog signal, D: digital signal
VSSA
ina
ry
Decoder
Peak/Bottom
Hold Det.
AGC Control
Post Amp
Rectifier
LPF
LF
Description
AGC amplifier (+) supply input
Antenna input 1 (fixed input)
Antenna input 3 (via analog switch)
Antenna input 2 (analog switch bypass)
Analog switch control input (active LOW)
Output for crystal filter
AGC amplifier (–) supply input
Input from crystal filter
Rectifier LPF capacitor connection
Bottom hold detector capacitor connection
Peak hold detector capacitor connection
AGC gain hold control (active LOW)
Substrate (–) supply input
Clock time code output (active LOW)
Standby state control input (active LOW)
AGC amplifier gain control switch (active LOW, for test mode)
SEIKO NPC CORPORATION —2
SM9501B
Electrical Characteristics
V
DD
= 4.5 to 5.5V, V
SS
= 0V, Ta =
−40
to +85°C unless otherwise noted.
Rating
Parameter
Supply voltage
Maximum operating current
consumption
1
Operating current consumption
1
Symbol
V
DD
I
DDM
V
DD
= 5.0V, Ta = 25°C, no input signal,
PON: VSS, OUT: OPEN
Condition
min
4.5
–
typ
5.0
65
max
5.5
100
V
µA
Unit
I
DDT
V
DD
= 5.0V, Ta = 25°C, 500ms pulsewidth,
0.1mVrms input (differential input),
PON: VSS, OUT: OPEN
ina
ry
–
55
–
–
–
0.1
–
0.5
–
1.0
–
80
35
–
–
80
–
15
8
–
–
–
–
8
1
–
–
–
–
0.5
–
0.8V
DD
–
–
–
–3.2
0.1
–
–
160
200
300
650
900
9
–
10
–10
–
–
100
400
700
–
–
–
–
–
–
200
500
800
–
f [kHz]
40
60
L
1
[kH]
6.70280
5.17396
C
1
[fF]
2.36228
1.36007
R
1
[kΩ]
11.4492
13.4826
C
0
[pF]
1.42773
1.04927
µA
Standby mode current consumption
Minimum input voltage range
Maximum input voltage range
Input frequency
Analog switch resistance
Startup time
2
Startup time
2
(PON)
Gain hold time
Input voltage
I
ST
V
FMIN
V
FMAX
F
IN
R
A
t
ON
t
PON
t
HLD
V
IL
V
IH
PON: VDD or OPEN, FCN: VDD or OPEN,
HLDN: VDD or OPEN
µA
IN1–IN2 differential input, FIN = 40kHz, 60kHz
Ta = 25°C
µVrms
IN1–IN2 differential input, FIN = 40kHz, 60kHz
IN1–IN2 differential input
V
IN2
= 0V, V
IN3
= 50mV
When supply is applied
From standby mode
± 3dB change
mVrms
kHz
Ω
sec
sec
sec
V
V
µA
µA
µA
µA
ms
ms
ms
ms
ms
dB
PON, FCN, HLDN pins
PON, FCN, HLDN pins
Input current
LOW-level output current
HIGH-level output current
Fall time output propagation delay
3
Rise time output propagation delay
3
LOW-level output pulsewidth
4
(200ms)
LOW-level output pulsewidth
4
(500ms)
LOW-level output pulsewidth
4
(800ms)
Noise rejection ratio
5
pre
L
1
C
1
R
1
C
0
1. Measured using the standard circuit.
2. The time taken under stable wave input conditions from when power is applied or standby is released, using PON, until stable digital output occurs
within ratings.
3. The time taken, with 10:1 input signal amplitude ratio and 500ms pulsewidth, from when a change in signal input occurs until the output OUT changes.
Note that this characteristic is very dependent on the antenna and crystal filter characteristics. The standard crystal used here has the following equiv-
alent circuit coefficients.
4. Values obtained when using the standard crystal employed here. Note that these values are dependent on the crystal characteristics, and should be
considered as reference values.
5. Time averaged rms values, where the noise is white noise and the measurement bandwidth is determined by the crystal filter equivalent used in the
standard circuit.
lim
I
IH
I
OL
V
DD
= 4.5V, OUT = 0.5V
I
OH
t
DN
t
UP
V
DD
= 4.5V, OUT = 4.0V
T
200
T
500
T
800
S/N
I
IL
V
IL
= 0V, PON, FCN, HLDN pins
V
IH
= V
DD
, PON, FCN, HLDN pins
FIN = 40/60kHz, standard crystal,
NPC standard jig
V
IN
= 1µVrms to 80mVrms
SEIKO NPC CORPORATION —4
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