M54128L データシートの表示（PDF） - Renesas Electronics
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M54128L Datasheet PDF : 22 Pages
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M54128L/FP
Pin Functions
Pin no.
L
FP
Pin name
Function
Common
7
14
Vs
6
13
Vcc
Power supply
Output pin for internal constant-voltage circuit; connect to a decoupling capacitor
9
2
IREF
Connect a resistor to set the constant current of the internal circuits; approx. 1.3 V
8
1
GND
Ground
5
12
PSAV
During normal use, connected to VCC pin [13]. When not using the abnormal voltage
detection function, should be grounded, so that circuit currents can be reduced. Pin
IBLI [11] and pin TTDC [10] should also be grounded.
Leakage detection, abnormal voltage detection, SCR driving circuits
10
3
11
4
12
5
13
6
14
7
2
9
4
11
3
10
1
8
VREF
ILKI
TRC1
TRC2
PSEL
OFFc
IBLI
TTDC
SCRT
Input standard level pin for leakage detection circuit; approx. 2.7 V
Another input pin for leakage detection circuit
Pin for connection to a capacitor to integrate the level discriminator output signal of
the leakage input signal
Pin to connect a capacitor for noise elimination
Logic function switching pin for leakage detection
•When grounded:negative input Æ positive input Æ negative input
•When connected to VCC pin [13]: negative input Æ positive input
SCRT operates with the above logic.
•When leakage input signal is not continued
•When abnormal voltage input signal is not continued
•When a leakage or abnormal voltage is detected and SCR is turned on
After a prescribed amount of time, this IC is returned to the initial state.
A capacitor to set the time for this function is connected.
Abnormal voltage detection circuit input pin
Pin to connect a capacitor to set the time for the abnormal voltage detection circuit
Thyristor driving output pin
Rev.1.0, Sep.16.2003, page 4 of 21
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