UC1872
UC2872
UC3872
CONNECTION DIAGRAMS
ABSOLUTE MAXIMUM RATINGS
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to +10V
VCC, VC Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +24V
ZD Input Current
SOIC-16, SSOP-16 (TOP VIEW)
DW, M Package
High Impedance Source . . . . . . . . . . . . . . . . . . . . . . +10mA
ZD Input Voltage
Low Impedance Source . . . . . . . . . . . . . . . . . . . . . . . . +24V
Power Dissipation at TA = 25°C . . . . . . . . . . . . . . . . . . . . . . 1W
Storage Temperature . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Lead Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
Note 1: Currents are positive into, negative out of the specified
terminal.
Note 2: Consult Packaging Section of Databook for thermal limi-
tations and considerations of package.
DIL-14 (TOP VIEW)
N Package
PLCC-20 (Top View)
Q Package
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these parameters apply for TJ = −55°C to +125°C for the
UC1872, –40°C to +85°C for the UC2872, −0°C to +70°C for the UC3872; VCC= 5V, VC = 15V, VENBL = 5V, CT = 1nF, ZD = 1V.
PARAMETER
Reference Section
TEST CONDITIONS
MIN
TYP
MAX UNITS
Output Voltage
TJ = 25°C
2.963 3.000 3.037
V
V
Over Temperature
VCC = 4.75V to 18V
IO = 0 to −5mA
2.940 3.000 3.060
Line Regulation
Load Regulation
10
10
mV
mV
Oscillator Section
Free Running Frequency
Maximum Synchronization Frequency
Charge Current
TJ = 25°C
TJ = 25°C
VCT = 1.5V
57
68
78
240
220
2
kHz
kHz
µA
%
160
180
200
200
Voltage Stability
Temperature Stability
Zero Detect Threshold
Error Amp Section
Input Voltage
4
8
%
0.46
0.5
0.56
V
VO = 2V
1.445 1.475 1.505
V
µA
dB
V
Input Bias Current
Open Loop Gain
−0.4
90
−2
VO = 0.5 to 3V
VINV = 1.3V
65
Output High
3.1
3.5
3.9
2
TI [ TEXAS INSTRUMENTS ]
