1125ABV_ND13009E00

SM1125ABV
Multimelody IC for Pagers
OVERVIEW
The SM1125ABV is melody IC fabricated in NPC’s Molybdenum-gate CMOS for use in mobile telecommunications equipment.
FEATURES
ORDERING INFORMATION
8
VSS
2
7
VDD
SC
3
6
MTO
ST
4
5
TEST
PACKAGE DIMENSIONS
(Unit: mm)
Device
Package
SM1125ABV
8-pin VSOP
0.5 ± 0.2
■
■
1
SI
4.4 ± 0.2
■
OSC
6.4 ± 0.3
■
(Top view)
0.575 TYP
+ 0.1
0.15 − 0.05
3.1 ± 0.3
1.15 ± 0.05
■
12 melodies selectable
Level hold playback mode
Built-in oscillator circuit
• Oscillator frequency: 38.4kHz
2-pin serial data melody selection and 1-pin melody
playback control
Power save function
• Oscillator stopped in no-play modes
Molybdenum-gate CMOS process
8-pin plastic VSOP package
0.65
0.10
0.22 ± 0.1
0.1 ± 0.05
■
■
PINOUT
+
0.12 M
SEIKO NPC CORPORATION —1
SM1125ABV
BLOCK DIAGRAM
VSS
OSC
SW2
1/2 or 1/4
OSC
VDD
Scale
Counter
Divider
1/128
SI
Scale
ROM
Control
Circuit
SC
MTO
TEST
Main
ROM
ST
MultiPlexer
Tempo Latch
Tempo Counter
Rhythm
Counter
Address
Counter
Start
Address
Latch
PIN DESCRIPTION
Number
Name
I/O
Function
1
OSC
I
External resistor and capacitor connection pins
2
SI
I
Playback control serial interface data input
3
SC
I
Playback control serial interface clock input
4
ST
I
Playback start/stop control signal input
5
TEST
I
Test input pin. Leave open or tie to VSS. (pull-down resistance built-in)
6
MTO
O
Playback melody signal output
7
VDD
–
Supply pin (+)
8
VSS
–
Ground pin
SEIKO NPC CORPORATION —2
SM1125ABV
SPECIFICATIONS
Absolute Maximum Ratings
Parameter
Rating
Unit
VDD − VSS
− 0.3 to 5.0
V
Input voltage range
VIN
VSS − 0.2 to VDD + 0.2
V
Power dissipation
PD
100
mW
Storage temperature range
Tstg
− 40 to 125
°C
Rating
Unit
Supply voltage range
Symbol
Condition
Recommended Operating Conditions
VSS = 0V
Parameter
Symbol
Condition
Supply voltage
VDD
2.0 to 3.6
V
Operating temperature
Topr
−20 to 70
°C
DC Characteristics
Unless otherwise noted Ta = −20 to 70°C, VSS = 0V, VDD = 2.0 to 3.6V
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
2.0
3.0
3.6
V
Supply voltage
VDD
Current consumption (1)
IDD1
Non-playback mode, Ta = 25°C
–
–
0.5
µA
Current consumption (2)
IDD2
Playback mode, MTO pin open
–
215
600
µA
VDD − 0.2
–
VDD
V
VSS
–
VSS + 0.2
V
Input voltage
VIH
ST, SI, SC pins
VIL
IIH1
ST, SI, SC pins, VIH = VDD, Ta = 25°C
–
–
0.5
µA
IIL1
ST, SI, SC pins, VIL = 0 V, Ta = 25°C
–
–
0.5
µA
IIH2
TEST pin, VIH = VDD
–
–
200
µA
VOPN
TEST pin
–
–
0.1
V
VOH
MTO pin, IOH = 1mA
VDD − 0.4
–
VDD
V
VOL
MTO pin, IOL = 1mA
VSS
–
VSS + 0.4
V
Oscillator frequency
fOSC
NPC test board measurement,
RO = 91kΩ, CO = 200pF, VDD = 2.0 to 3.6V
34.5
38.4
42.5
kHz
Frequency stability
∆f/f
–
0.1
–
%/0.1V
Oscillator start voltage
VDOB
–
–
1.6
V
Oscillator stop voltage
VDOS
–
–
1.6
V
Input current (1)
Input current (2)
Open voltage
Output voltage
SEIKO NPC CORPORATION —3
SM1125ABV
AC Characteristics
Unless otherwise noted Ta = −20 to 70°C, VSS = 0V, VDD = 2.0 to 3.6V
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
tSC
5.0
–
–
µs
SC HIGH-level pulsewidth
tSWH
2.0
–
–
µs
SC LOW-level pulsewidth
tSWL
2.0
–
–
µs
SC pulse cycle
“SC input pulse” timing
SC pulse rise time
tSr
–
–
200
ns
SC pulse fall time
tSf
–
–
200
ns
SI-SC setup time
tDS
2.0
–
–
µs
SI-SC hold time
tDH
2.0
–
–
µs
“SC-SI serial input pulse”
timing
SC input pulse
VIH
0.5VDD
VIL
0.9VDD
0.1VDD
t SWH
t SWL
t Sf
t SC
t Sr
SC-SI serial input pulse
VIH
0.5VDD
VIL
SC
t DS
SI
t DH
VIH
0.5VDD
VIL
SEIKO NPC CORPORATION —4
SM1125ABV
FUNCTIONAL DESCRIPTION
Control Functions
Reference clock
SM1125ABV has built-in RC oscillator circuit (oscillation frequency: 38.4kHz typ).
Power-saving function
The built-in RC oscillator is stopped when not in playback mode (when ST is LOW), preventing unwanted current flow.
ST
OSC
RC Oscillator
Figure 1. Oscillator circuit operation
Playback control
The ST pin controls the start of playback. While ST is HIGH, the melody is played repeatedly, and when ST
goes LOW, playback stops. Melodies are selected by input serial data on pins SI and SC, as shown in table 1.
The final 4 serial data bits in any input data string form the valid selection data, and this data is retained even
after playback. If serial data is input during playback, the data is ignored and playback continues.
Invalid
Data
SI
Valid
Data
Invalid
Data
? ? ? ?
? ? B3 B2 B1 B0
SC
ST
MTO
Pin SC should be LOW when either a LOW-to-HIGH or HIGH-to-LOW transition occurs on pin ST.
Figure 2. Serial data input timing
Serial data selection
Table 1. Serial data melody select
B3
B2
B1
B0
ST
Melody
B3
B2
B1
B0
ST
Melody
L
L
L
L
L→H
1st melody
L
H
H
L
L→H
7th melody
L
L
L
H
L→H
2nd melody
L
H
H
H
L→H
8th melody
L
L
H
L
L→H
3rd melody
H
L
L
L
L→H
9th melody
L
L
H
H
L→H
4th melody
H
L
L
H
L→H
10th melody
L
H
L
L
L→H
5th melody
H
L
H
L
L→H
11th melody
L
H
L
H
L→H
6th melody
H
L
H
H
L→H
12th melody
SI
#n1 Data
#n2 Data
SC
ST
MTO
#n1 Play
#n1 Play
#n1 Play
#n2 Play
Melody plays repeatedly when ST is HIGH, and stops immediately when ST goes LOW.
Figure 3. Melody repetition timing
SEIKO NPC CORPORATION —5
SM1125ABV
Playback timing diagrams
Playback start
Playback starts 128 ± 1 OSC clock cycles after ST goes HIGH.
Valid
Data
Invalid
Data
SI
MSB
LSB
SC
ST
128 1 Clock
*Internal
Clock
;;;;;;
;;;;;;
;;;;;;
MTO
Figure 4. Start timing
Playback stop
Playback stops immediately and the oscillator also stops when ST goes LOW.
ST
*Internal
Clock
;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;
MTO
Figure 5. Stop timing
SEIKO NPC CORPORATION —6
SM1125ABV
TYPICAL APPLICATION
B+
2.0 to 3.6V
RO
91kΩ
OSC
CONTROLLER
CO
VSS
SI
VDD
SC
MTO
ST
TEST
200pF
OSCILLATOR FREQUENCY MEASUREMENT
The measurement circuit below shows a SM1125ABV with built-in RC oscillator circuit and external RC
oscillator components capacitor CO and resistor RO.
When ST is switched to VDD, the oscillator starts and outputs a pulse on MTO. The output pulse is counted
using a frequency counter.
RO
CO
Switch
91kΩ
SM1125ABV
OSC
VSS
SI
VDD
SC
MTO
ST
TEST
Frequency Counter
Note that the board mounting and wiring will marginally affect the output frequency, even for equivalent values for RO and CO.
SEIKO NPC CORPORATION —7
SM1125ABV
SONG LIST
For products intended solely for sale within Japan, please contact our company about copyright permission.
For products intended for sale outside of Japan, it is the responsibility of the customer to obtain permission to
use a melody by following all relevant copyright rules and regulations for the countries concerned.
SM1125ABV
Number
Song Title
Composer
Time [s]
1
Departure
Komuro Tetsuya
8.46
2
Mirai yosouzu II
Yoshida Miwa
19.4
3
Roman hikou
Komekome club
13.68
4
Namonaki uta
Sakurai Kazutoshi
21.03
5
Last Christmas
Michael George
18.14
6
We wish you a merry Christmas
–
9.78
7
Jingle Bells
–
15.56
8
Happy Birthday to you
Hill Mildred Junius Welch/Hill Patty Smith
12.17
9
Green Sleeves
–
17.63
10
Jesu joy of mans desiring
–
20.18
11
Mickey Mouse March
Dodd Jimmie
5.89
12
It’s a small world
Sherman Richard M/Sherman Robert B
12.99
Note. The copyrights of music described in this list have been the public domain or being managed by JASRAC in Japan.
SEIKO NPC CORPORATION —8
SM1125ABV
Please pay your attention to the following points at time of using the products shown in this document.
The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on
human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such
use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and
harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right
to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that
the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties.
Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document.
Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products,
and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or
modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in
compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested
appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
1-9-9, Hatchobori, Chuo-ku,
Tokyo 104-0032, Japan
Telephone: +81-3-5541-6501
Facsimile: +81-3-5541-6510
http://www.npc.co.jp/
Email: sales@npc.co.jp
ND13009-E-00 2013.03
SEIKO NPC CORPORATION —9