View MRD520A_832464.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SPECIFICATION
for
MRD520A
Dual Channel F2F Decoder IC
Uniform Industrial Corp.
Taiwan, Factory 1st FL., No.1, Lane 15, Chih Chiang Street, Tu Cheng City, Taipei Hsien, Taiwan, R.O.C. Tel Fax E-mail : 886-2-268-7075 : 886-2-268-6327 : uniform@ms1.hinet.com USA, Office 46750 Fremont Blvd Suite 104 Fremont, CA 94538 USA Tel Fax E-mail : 1-510-438-6799 : 1-510-438-6790 : uicu@aol.com PREPARED BY
APPROVED BY
CHECK BY
CONTENTS
1. DESCRIPTION..................................................................................................... 1 2. FEATURES.......................................................................................................... 1 3. APPLICATIONS .................................................................................................. 1 4. PIN DESCRIPTION ............................................................................................. 2 5. FUNCTION DESCRIPTION................................................................................ 3 6. ABSOLUTE MAXIMUM RATINGS ................................................................... 4 7. RECOMMENDED OPERATING CONDITIONS............................................... 4 8. APPLICATION CIRCUIT .................................................................................... 5 9. TIMING DIAGRAM FOR MRD520A.................................................................. 6 10. OUTLINE DIMENSION ..................................................................................... 7
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
1. DESCRIPTION
The MRD520A is a 1.2um CMOS integrated circuit for purpose of amplification and decoding for F2F magnetic stripe encoding card reader.
2. FEATURES
l l l l l l l Integrated Amplification Circuitry for magnetic head signals. Number of start bits (4/8 bits) to ignore selectable. Both output polarity supported. Adjustable read data output clock pulse width. Dual channel support for 75/210 BPI recording density. Magnetic head data input frequency range from 300 bit/sec to 12600 bit/sec. Idle mode controllable by external hardware or micro-processor.
3. APPLICATIONS
l l Magnetic stripe card reader. POS keyboard. PIN Configuration (Top View)
GND SEN1N SEN1P OP1OUT OP2NIN OP2OUT OP3OUT OP6OUT OP5OUT OP5NIN OP4OUT SEN2P SEN2N VREFIN
1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15
RES ADJ1 CLS OUT1 OUT1X OCK1 IBS OSCO OSCI OCK2 OUT2X OUT2 ADJ2 VDD
OUTLINE SOP 28 PIN
Page : 1
October, 1997
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
4. PIN DESCRIPTION
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 GND SEN1N SEN1P OP1OUT OP2NIN OP2OUT OP3OUT OP6OUT OP5OUT OP5NIN OP4OUT SEN2P SEN2N VREFIN VDD ADJ2 OUT2 OUT2X OCK2 OSCI OSCO IBS OCK1 OUT1X OUT1 CLS ADJ1 RES Adjust read out clock pulse width for F2F channel 2 Positive read out data for F2F channel 2 Negative read out data for F2F channel 2 Negative read out clock for F2F channel 2 RC oscillator input RC oscillator output Select ignore leading bit, "LOW" for 4 bits and "HIGH" for 8 bits Negative read out clock for F2F channel 1 Negative read out data for F2F channel 1 Positive read out data for F2F channel 1 Card Loading Signal output, "LOW" after ignore bits, "HIGH" if no input for around 12.5mS Adjust read out clock pulse width for F2F channel 1 Power on reset, LOW reset the logic circuit and enter idle mode. Approx. 10mS after HIGH level to normal function Input from magnetic head Input from magnetic head Amplifier OP1 output Amplifier OP2 - input Amplifier OP2 output Amplifier OP3 output Amplifier OP6 output Amplifier OP5 output Amplifier OP5 - input Amplifier OP4 output Amplifier OP4 + input Amplifier OP4 - input Reference voltage for analog signal processing
Page : 2
October, 1997
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
5. FUNCTION DESCRIPTION
Data signal inputs read from a magnetic card via a magnetic head are fed into the SEN1P and SEN1N (SEN2P and SEN2N) pins, amplified and wave shaped by internal analog circuitry, then converted to logic level F2F data format. Once the F2F signals are detected, the decoding logic ignores the leading 4 or 8 bits (set by IBS pin), via the ignored bits the reference bit length is determined. The succeeding inputs are identified as bit 0 or 1 by the average bit length of preceding two bits, if the data toggles before 70% of the reference bit length then the data is identified as a "1" bit and the next data toggle regarded as the beginning of next data bit. If the data toggles after 70% of the reference bit length then the data is identified as a "0" bit and the current data toggle is as the beginning of next data. After the ignored bits, then pin CLS will be pulled low, the succeeding data bit will be shifted out after the beginning of next data bit. The pin OCK1 (OCK2) will be pulled low after the next data is detected and a 12uS delay inserted, it will be kept low for 14 to 60uS depending on the external resistor connected to pin ADJ1 (ADJ2). If the next bit comes before OCK1 (OCK2) goes high, then OCK1 (OCK2) will be forced to pull high and then begins next cycle, it means that the data signals will be ready before OCK1 (OCK2) goes low and stay valid till 12uS before next down edge of OCK1 (OCK2).
Page : 3
October, 1997
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
6. ABSOLUTE MAXIMUM RATINGS
Symbol Parameter VDD IBS,OSCI,RES,ADJ1,ADJ2 Conditions Ratings -0.5 to +7.0 -0.5 to VCC +0.5 Unit V V VCC Supply Voltage VIN1 Input Voltage VIN2 Input Voltage
OP2NIN,OP5NIN -0.5 to VCC +0.5 V OP1OUT,OP2OUT,OP3OUT, mA OP4OUT,OP5OUT,OP6OUT, -10 to +10 IO Output Current OSCO2,OUT2,OUT2X,OUT1, OUT1X,OCK1,OCK2 SEN1P ~ SEN1N, V -1.0 to +1.0 VID Differential Input Voltage SEN2P ~SEN2N TOPR Operating Temperature -10 to +70 J TSTG Storage Temperature -50 to +140 J
7. RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Conditions Ratings Unit Min. Typ. Max. 4.5 5 5.5 V VCC -0.5 VCC +0.5 V -0.5 0 0.5 V -1.5 -0.1 3 5 300 2.3 30 3.4 2.5 1.6 4.0 3.0 2.0 80 13000 mA mA mA mV Hz MHz Kohm mA mA mA
VCC Supply Voltage VIH Input High Voltage IBS, RES VIL Input Low Voltage IBS, RES Output High Source OCK1,OUT1,OUT1X, IOH Current at VOH=VCC -0.4 OCK2, OUT2,OUT2X Output High Source IOH CLS Current at VOH=VCC -0.4 OCK1,OUT1,OUT1X, Output Low Sink Current IOL OCK2,OUT2, at VOL=0.4 OUT2X,CLS SEN1P ~ SEN1N VIN Differential Input Voltage SEN2P ~ SEN2N SEN1P ~ SEN1N FIN Input Frequency SEN2P ~ SEN2N FOSC Oscillation Frequency External resistor between ROSC OSCI & OSCO IOPR Signal input at 12.6K bps ISBY No signal input IDLE Reset = Vss
Page : 4
October, 1997
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
8. APPLICATION CIRCUIT
5V 1M 0.1u
5V Mag. head SEN1N/SEN2N SEN1P/SEN2P R1 C1 47p OP1OUT/OP4OUT OP2NIN/OP5NIN OP2OUT/OP5OUT OP3OUT/OP4NIN RES ADJ1/ADJ2 1K~3M IBS OSCO Rocs=30K(5V) OSCI OCK1/OCK2 OUT1/OUT2 OUT1X/OUT2X CLS VDD 5V 10K CLS 5V
GND
VREFIN 2.2u
5V Note :
TK1 R1 3.3K
TK2 22K
C1 3300p 4700p
Page : 5
October, 1997
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
9. TIMING DIAGRAM FOR MRD520A
Page : 6
October, 1997
Uniform Industrial Corp. MRD520A Dual Channel F2F Decoder IC
10. OUTLINE DIMENSION
Symbol A A1 A2 b c D E
Dimensions in inch 0.110 Max. 0.004 Min. 0.093 +/-0.005 0.016 +0.004 -0.002 0.010 +0.004 -0.002 0.705 typ (0.725 Max) 0.295 +/-0.005 0.050 +/-0.006 0.370 NOM 0.406 +/-0.012 0.036 +/-0.008 0.055 +/-0.008 0.043 Max. 0.006 Max. 0X~ 10X
Dimensions in mm 2.79 Max. 0.10 Min. 2.36 +/-0.13 0.410 +0.10 -0.05 0.254 +0.10 -0.05 17.91 typ (18.42 Max) 7.49 +/-0.13 1.270 +/-0.15 9.40 NOM 10.31 +/-0.31 0.91 +/-0.20 1.40 +/-0.20 1.09 Max. 0.15 Max. 0X~ 10X
e
e1 HE L LE S y K Note : a The max. value of dimension D included end flash. b The dimension E exclude resin lins. c The dimension E is for PCB surface mount pad pitch design reference only. d The dimension S included end flash. e All dimension are based in British system.
Page : 7
October, 1997

▲Up To Search▲

Price & Availability of MRD520A

	To Download MRD520A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .