M56710FP

www.DataSheet4U.com M56710FP F2F Magnetic Stripe Encoding Card Reader REJ03F0175-0201 Rev.2.01 Mar 31, 2008 Description The M56710FP is a semiconductor integrated circuit of Bi-CMOS structure having an F2F demodulator function for magnetic card reader. Features Low current dissipation (0.7 mA when on standby as a standard) Provided with glance-over selection input (4, 8, and 16 bits) Provided with output polarity (“L” active or “H” active) switching input Miniature mini-mold package Wide operating temperature range Ta = −20 to 75°C Application Magnetic card reader Functional Description Data signal which is read from magnetic card via magnetic head is input from HD2 and HD1 pins., and converted into F2F pattern signal by analog processing in amplifier OP1, differentiator OP2, sensitivity setting circuit and waveform shaping circuit. If F2F signal is input, the logic section glances over the prescribed number of bits set by IB1 and IB2 input before performing digital processing, and then outputs card reading signal CLS, read clock signal RCP, and read data signal RDT. INV turning to “L” switches each output of CLS. RCP and RDT from “L” active to “H” active. Standard Bits: Let the number of glance-over bits set by IB1 and IB2 be M. Let the Mth FC (flux change) through M+1st FC after LDI input is turned from “L” to “H” be a standard bit with a time width of TB0. I/O is discriminated from the next bit to this standard bit as a data bit. I/O discrimination Let t...