FEATURES
MX172
TRIANGULAR TYPE AUTO FOCUS IC
• Package : 14-pin SSOP
• Operating voltage : 2V~4V
• Operating temperature : -25
o
C~60oC
• Supply current : max. 10mA (without output current)
• Input current level : 1nA~5uA
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
14
GND
CH1
PSD1
PSD2
CH2
VCC
VE
2
3
4
MX172
5
6
7
OUT1
13
OUT2
12
IRED
11
CTRL
10
CT
9
VR1
8
VR2
• Surround light level : max. 50uA (PSD output current)
• IRED drive output : min. 20mA
• Magnet drive current : min. 200mA
• Measuring time : max. 50ms
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)
P/N: PM0168
1
REV. 2.1, AUG 29, 1995
BLOCK DIAGRAM
MX172
VR1 VR2
GND
CH1
PSD1
PSD2
CH2
Vcc
Surrounding light
Head Amp.1
Head Amp.2
Surrounding light
BASIC CONNECTION DIAGRAM
rejection 1
rejection 2
Switch
AF Adjust
Inf.Cramp
Operation
Sequence Control Logic
CTLR
Comparator
Latch
and
Encode
IRED Drive Circuit
Timing Circuit
C Timing
Output
Driver
Output1, 2
IRED
VE
P/N: PM0168
OUT1
OUT2
IRED
CTRL
VR1
VR2
14
13
12
11
10
IRED
R3
SW1
C4
m
0.022 F
9
VR2
VR1
8
REV. 2.1, AUG 29, 1995
GND
1
CH1
PSD
2
3
4
5
6
7
PSD1
PSD2
CH2
VCC
VE
C TIMING
C1
C2
0.47 F
C3
0.47 F
m
m
2
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNIT CONDITION
VCC Supply Voltage -0.3~4.0 V
PD Power Dissipation 350 mW TA<25
PDR Power Dissipation Ratio -3 mW/
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
TOPR Operating Temperature 2 -15~+50
TSTG Storage Temperature -55~+150
NOTE: The operating temperature 1 range expresses the qualitative
operating temperature range but it does not guarantee characteristics.
o
C TA>25oC
o
C
o
C
o
C
(NOTE)
MX172
o
C
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
P/N: PM0168
3
REV. 2.1, AUG 29, 1995
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
P/N: PM0168
4
REV. 2.1, AUG 29, 1995
TIMING WAVEFORM
SW1 (POWER)
IRED
AF MAG.
ORDERING INFORMATION
PART NO. PACKAGE
MX172MC 14 pin SSOP
MX172
20MS (TYP.)
0.12MS (TYP.)
PACKAGE INFORMATION
14 PIN PLASTIC SSOP
0.22+0.1
1 7
5.0+0.3
0.65
0.10
814
UNIT : mm
6.4+0.3
4.4+0.2
1.15+0.2
0.11
0.3 MIN
0.2+0.1
P/N: PM0168
5
REV. 2.1, AUG 29, 1995
MX172
MACRONIX INTERNATIONAL CO., LTD.
HEADQUARTERS:
TEL:+886-3-578-8888
FAX:+886-3-578-8887
EUROPE OFFICE:
TEL:+32-2-456-8020
FAX:+32-2-456-8021
JAPAN OFFICE:
TEL:+81-44-246-9100
FAX:+81-44-246-9105
SINGAPORE OFFICE:
TEL:+65-747-2309
FAX:+65-748-4090
TAIPEI OFFICE:
TEL:+886-3-509-3300
FAX:+886-3-509-2200
MACRONIX AMERICA, INC.
TEL:+1-408-453-8088
FAX:+1-408-453-8488
CHICAGO OFFICE:
TEL:+1-847-963-1900
FAX:+1-847-963-1909
http : //www.macronix.com
MACRONIX INTERNATIONAL CO., LTD. reserves the rignt to change product and specifications without notice.
6
Loading...