UM3491 ETC2 | Alldatasheet
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. ~ UNITED MICROELECTRONICS 42 ys | 9325812 go00584 3 ii . 1 1 .9325812 UNITED MICROELECTRONICS 92D 00584 D 7-77 -/3 [igre rs otras oN RNE| Beet 2 ree eee eS eet Melody Generator With ie] 5 Accompaniment im a Features a = 1.5V operating voltage for speaker application. © 16 programmable time segments for note arrangement EB ‘© 3V operating voltage for piezo application. ® Nt programming 3 ® 1024-note memory; up to 16 can be selected tunes. ‘| Pulse signal output when melody ends = = Dual tone mixed output; 2 individual external envelope © Low stand-by current 7 ba circuits ™ Single song played repeatedly or auto stop = ® RC oscillator with one external resistor | All songs played repeatedly or auto stop Ps ™ 31 programmable tones (include rest) from C4 ~Fy ® Any song can be preset Es © 15 programmable tempos Ed General Description = The UM3491 series comprises mask-ROM-programmed melody and accompaniment which are mixed ‘together to 4 melody generators with accompaniment implemented generate simultaneous output. & through CMOS technology. They ere designed to play nes melodies according to previously programmed information. The UM34Q1 series is intended for applications such as = toys, doorbells, melody clock/timers, etc. . Sa The devices also include 2 individual preamplifiers for = : = Pin Configuration Block Diagram E 3 . sci oxo ew 4 om al : en. oEn [1 18[)Vop wn = move C2 ff ca so. frnaaon Fg = uC} 15 Jmti cs faccouraument |_| [envevorns x tri C]6 13Jmro @ env2 = uarelt cxr % enn [Je 11 Doser & | ‘TEST CE MODE LP TRIGcER| Rava a 1-25 =] - oa a i nrg nnn .
UNITED MICROELECTRONICS 92 Def) 5325812 ooogsas § Ir | 9325812 UNITED MICROELECTRONICS 92D 00585 =D 7-77+/3 1 Ou: vic um34s91 _ Absolute Maximum Ratings* *Comments . Co LeeseveseceseeeessesesVeg=O.3V10 Vpp +o THESE ore stress ratings only. Functiénel operation of : . og. this device at these or any other conditions above those ~ Ambent Temperature under Bias -.----. ~10°C1060°C _ingicated in the operational sections of this specification - ° a . conditions for extended periods may affect device relia- : bility. Electrical Characteristics : (Vgg= OV, Ta= 25°C, Foge = 64KH2, unless otherwise specified.) : ee pe = | a] a a BD Drive Current Voo = $V. Von = 1.5V i MTI=0V & Vop = 3V. Vor = 1. 3 “enous pe [om | - | - [een | = | ‘BD Drive Current Igps 1mA Voo = 3V. Voy = 1.5V a MTI=0V + ; Vpp = 3V, Voy = 1.5V Fe Fi Deviation ; jasmin wm [nm |= [om [ere | ‘s per lot . x Fosc (3.3V) — Foge (2.7) = Frequency Stability AFIF —— = Fose (2.7V) : ee 1-26 ca,
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UMG um3491 : Pin Description . MODE The melody will be repeated if this pin connected to Vpp ak The melody will be stopped automatically if this pin connected to Ves eee TEST This pin is used for testing; in normal operation it should be open >" ee iP ‘Only one song is played if this pin connected to Vpp S: ee Alll songs are played if this pin connected to Ves oe cE Chip enable if connected to Vpp inketaiek Chip disable’if connected to Veg : ie | 6 | _TRI___|__A positive going edge applied to this pin will change the melody to the next song * BUSY This output is high during stand-by and low during melody output *. This pin provides a positive pulse output after the melody stops. The output is ie low otherwise £ jt | Osco RC oscillator pin or inverted clock output = [12 | —ENV2_—_—[_Ennweloping circuit terminal a ; 4 | ENVI Enveloping circuit terminal 3 Application Circuit . ¢ 1. FOR PIEZO a Oo1uF~O.1NF 3 HL 2 100K2 y PIEZO al af 390K. ~ Oo + 3.310nF Py 1 7 16 16 14 19°~412~~«41~«10 z Vpp BD BD MTI ENVI MTO ENV2 OSCI OSCO ¥ D) uM3491 3S OEN MODE TEST LP CE TRI BUSY END Vg 12 3 4 6 6 7 8 8 j { 1-27 . ' : : ~ nnn oe eerie ees
UNITED MICROELECTRONICS 92 DEM 4325812 0000587 4 | . 9325812 UNITED MICROELECTRONICS 92D 00587 D 777-73 \\ ®ume UM3491 2. FOR SPEAKER : 0.01MF™0.1HF . . : SPEAKER [[| pe ox 8050, v7 I i 390 KQ. 3.3™| 10 F: = ] 18 17 16 15 14 13 12 Ww 10 Vopo BD 8D MTI ENVI MTO ENV2 OSCI Osco 1) uM3491 OEN MODE TEST LP CE TRI BUSY END Veg 1 2 3 4 6 6 7 8 9 Bonding Diagram 53 Pad No. Designation x Y : BB BD MTI ENVIMTO 1 OEN —1811 —702 £
2 MODE -1813 — 965 =
BE fy env2 3 NC -1615 = —1164 ie UM3491 Osu 4 uP 1219 —1220 ' Y 5 ce — 507 1220 . losco 6 TRI sa - 1248 : E 7 BUSY 1396, —1240 od bo x eS 2 8 END 1785 = —1222 s Yop ‘ a 9 Vss 1801 - 10 E 10 Osco 1801 198 on a " osci 1801 990 : MODE
12 ENv2 1801 1190
BA & (ta) 13 MTO - 331 1208 NC LP ce TAI BUSY END 4 ENVI ~ 531 1208 1 500 sin unitsum 15 MT! -1071 1208
16 BD —1349 1184
W7 BD ~1720 1184
18 Vop -1811 — 496
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