DescriptionThe JT6M57-AS is a kind of single-chip microcomputer for 12-digit or 10-digit 2-memory calculator. The JT6M57-AS can drive the liquid crystal display (LCD). The JT6M57-AS is suitable for 1.5 V solar battery operated calculator for its single power supply operation, wide operating voltage range and low-power consumption. In addition, the device can be selectable with a pin-programmable to function of power timer and memory hold.
There are some operational features of JT6M57-AS as follows: (1)12 digits or 10 digits (selectable with a pin-programmable) of data, 2 digits of sign, error symbol, memory load symbol; (2)algebraic mode; (3)memory and grand total (GT) memory calculation; (4)accumulating GT memory register with count up (down) item counter; (5)automatic percentage operation with add-on, discount; (6)automatic delta percentage, mark-up and markdown operations; (7)square root; (8)constant calculation; (9)chain calculation; (10)change sign; (11)floating minus; (12)key roll over function (2 keys); (13)adding point mode (selectable with a switch); (14)leading zero suppression; (15)trailing zero suppression; (16)punctuation on display, commas for thousands; (17)memory overflow indicating to flashing of memory load mark; (18)memory and GT memory contents indicator, turned on with non-zero in the memory and GT memory; (19)registration overflow, indicating that too many digits are entered (the most significant digit are protected).
The last one is about the maximum ratings of JT6M57-AS: (1)supply voltage, VG: +0.3 to -2.0 V; (2)input voltage, VIN: +0.3 to VG-0.3 V; (3)operating temperature, Topr: 0 to 40; (4)storage temperature, Tstg: -55 to 125. Then is about some electrical characteristics (VG=-1.5±0.2 V, VSS2=-3.0±0.4 V, VDD=0 V, Ta=25): (1)operating voltage, VG: -1.2 V min, -1.5 V typ and -2.0 V max; (2)"1" input voltage, VIH(1): VG+0.4 V to VG V at K3-K10 pins; (3)"1" input voltage, VIH(2): VSS2+0.4 V to VSS2 V at K11-K14 pins; (4)"0" input voltage, VIL: 0 to -0.4 V at K3-K14 pins; (5)"1" output voltage, VOH(1): VSS2+0.4 V to VSS2 V at SEGMENT COM 1-3 pins; (6)"1" output voltage, VOL(1): 0 to -0.2 V at SEGMENT COM 1-3 pins.
JT6M57-AS Data Sheet
