CF1155 Datasheet, PDF (2/7 Pages) Nippon Precision Circuits Inc – Melody LSIs

CF1155 series
PAD DESCRIPTION
Name
OSH, LH
OUT, OUT
VDD
VSS
T1, T2, TC
TO
Function
Melody mode control inputs. Built-in pull-down resistors mean LOW -level signals are obtained when inputs are open circuit. The
resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics.
Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and O U T is HIGH during output for a
m usical rest note. Both pins are HIGH during the gap between musical notes.
Supply. The rear surface of the chip is V _{D D} level.
Ground
Test inputs. Pull-down resistor built-in.
Test output. The oscillator frequency (typ. 50kHz) is output for monitoring purposes.
SPECIFICATIONS
Absolute Maximum Ratings
Parameter
Supply voltage range
Input voltage range
Operating temperature range
Storage temperature range
Symbol
V_DD −V_SS
V _IN
T_opr
T _stg
Condition
Rating
−0.3 to 5.0
V_SS − 0.2 to V_DD + 0.2
−20 to 80
−65 to 150
Electrical Characteristics
T_a = 25°C, V_SS = 0V, V_DD = 1.5V
Parameter
Operating voltage
Current consumption¹
Current consumption²
LH, OSH LOW -level input voltage
LH, OSH HIGH-level input voltage
LH, OSH LOW -level input current
LH, OSH HIGH-level input current
O U T, O U T LOW -level output current
OUT, OUT HIGH-level output current
TO oscillator frequency
TO frequency stability (relative to
voltage)
TO oscillator start voltage
TO oscillator stop voltage
1. Measurement circuit
Symbol
V _DD
I_{D D 1}
I_{D D 2}
V _IL
V _IH
I_IL
I_{I H}
I_{O L}
I_{O H}
f_{O S C}
∆f/f₁
∆f/f₂
V _DOB
V _DOS
Condition
Non-play mode
Melody modes: OUT, O U T open
V _IL = 0.4V
V_IH = 1.5V
V_OL = 0.75V
V_OH = 0.75V
V_DD = 1.2 to 2.0V
V_DD > 2.0V
min
1.2
–
–
–
V_DD – 0.2
0.7
0.7
2.0
2.0
35
–
–
–
–
2. Measurement circuit
Rating
typ
1.5
0.01
25
–
–
1.5
1.5
–
–
50
1
2
–
–
max
3.6
0.3
50
V_SS + 0.2
–
3.0
3.0
–
–
65
–
–
1.2
1.2
Unit
V
V
°C
°C
Unit
V
µA
µA
V
V
µA
µA
mA
mA
kHz
%/0.1V
%/1V
V
V
A VDD
A VDD
1.5V
VSS
1.5V
LH VSS
NIPPON PRECISION CIRCUITS—2