REV. 2.1, AUG 29, 1995
P/N: PM0168
1
FEATURES
Package : 14-pin SSOP
Operating voltage : 2V~4V
Operating temperature : -25
o
C
~60
o
C
Supply current : max. 10mA (without output current)
Input current level : 1nA~5uA
Surround light level : max. 50uA (PSD output current)
IRED drive output : min. 20mA
Magnet drive current : min. 200mA
Measuring time : max. 50ms
DESCRIPTION
MX172 is designed for Triangular system auto focus
cameras. It is regarded as input component for PSD
(Position Sensitive Diode), and comprises of circuits that
drive AF magnet as output, an infrared emission diode
current control circuit, and control circuit of sequential
timing.
PIN CONFIGURATION
14 SSOP
PIN FUNCTIONS
SYMBOL
PIN NAME
GND
Ground Pin
CH1
Hold Capacitor Pin 1
PSD1
PSD Input Pin 1
PSD2
PSD Input Pin 2
CH2
Hold Capacitor Pin 2
VCC
Supply Pin (Secondly)
VE
Supply Pin (Battery)
VR2
VR Pin for Adjustment 2
VR1
VR Pin for Adjustment 1
CT
Timing Capacitor
CTRL
Power Control
IRED
Output Control for IRED
OUT2
Data Output Pin 2 (MSB)
OUT1
Data Output Pin 1(LSB)
14
13
12
11
10
9
8
2
3
4
5
6
7
OUT1
OUT2
IRED
CTRL
CT
VR1
VR2
GND
CH1
PSD1
PSD2
CH2
VCC
VE
MX172
MX172
TRIANGULAR TYPE AUTO FOCUS IC
3
REV. 2.1, AUG 29, 1995
P/N: PM0168
MX172
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNIT
CONDITION
VCC
Supply Voltage
-0.3~4.0
V
PD
Power Dissipation
350
mW
TA<25
o
C
PDR
Power Dissipation Ratio
-3
mW/
o
C
TA>25
o
C
VIN
Input Voltage
-0.3~VCC+0.3
V
BVOC
Output Voltage
-0.3~7.0
V
IOUT
Output Current
400
mA
TOPR
Operating Temperature 1
-25~+60
o
C
(NOTE)
TOPR
Operating Temperature 2
-15~+50
o
C
TSTG
Storage Temperature
-55~+150
o
C
NOTE: The operating temperature 1 range expresses the qualitative
operating temperature range but it does not guarantee charac-
teristics.
DC CHARACTERISTICS (TA = 25
o
C
, VCC = 2.2V, 3.0V, 4.0V)
SUPPLY CURRENT
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
CONDITION
ICC1
Standby Current
3.0
uA
ICC1
Quick Charge State (Charge)
2.5
7.0
mA
ICC2
Quick Charge State (Discharge)
2.5
7.0
mA
ICC3
Steady State (Charge)
2.0
5.0
mA
ICC4
Steady State (Discharge)
2.0
5.0
mA
ICC5
IRED Flashing State
8.0
mA
ICC6
Finish State
40.0
mA
TIMING CIRCUIT
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
CONDITION
ICT
CT Charge Current
0.8
1.3
2.0
uA
RCT
Discharge Resistance
5.6
7.0
8.5
K ohm
VTH1
Threshold Voltage1
655
680
740
mV
VTH2
Threshold Voltage2
1280
1383
1420
mV
DVTH2/3
Deference Vth2/3
14.0
25.0
35.0
mV
VSATPNP
VE/VCC PNP VCE (SAT)
220
mV
4
REV. 2.1, AUG 29, 1995
P/N: PM0168
MX172
HEAD AMPLIFIER/ADJUSTMENT CIRCUIT
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
CONDITION
VIN
Input Voltage
620
680
740
mV
ISDMX
Max. Surround Light
16.0
uA
IADJ
Adj. VR Current
38.0
44.0
50.0
uA
VCOMP1
Compare Voltage1
318
336
354
mV
Signal Ratio=3:7
VCOMP2
Compare Voltage2
530
560
590
mV
Signal Ratio=5:5
HOLD CAPACITOR CHARGE/DISCHARGE CURRENT
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
CONDITION
ICH1
Quick Charge Current
-300
-1000
uA
ICH2
Quick Discharge Current
460
1200
uA
ICH3
Steady Charge Current
-7
-11
-16
uA
ICH4
Steady Discharge Current
7
11
16
uA
ICH5
CH Input Current
100
nA
DATA OUTPUT TERMIANAL
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
CONDITION
IOUTLK1
Output Leak Current 1
1.0
uA
VO = 10.0V
IOUTLK2
Output Leak Current 2
1.0
uA
VO=VCC
VOUTSAT1
Saturation Voltage
300
mV
IO = 20mA
IOUTMX1
Max. Output Current1
20
mA
VOUTMAX1
Max. Voltage1
10.0
V
VOUTSAT2
Saturation Voltage2
300
mV
IO = 300mA
IOUTMX2
Max. Output Current2
300
mA
VOUTMX2
Max. Voltage2
6.0
8.0
10.0
V
IO = 300mA
IRED FLASHING CONTROL CIRCUIT
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
CONDITION
VIRED1
IRED Voltage (ON)
920
980
1030
mV
VIRED2
IRED Voltage (OFF)
350
mV
IIREDMX
Max. Output Current
15.0
mA
6
MX172
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