LS1240 STMicroelectronics, LS1240 Datasheet
LS1240
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LS1240 Summary of contents
Page 1
... To drive a dynamic loudspeaker LS1240 can simply use a decoupling capacitor, thus eliminating the usual transformer. No current limitation is provided on the output stage of LS1240 minimum load Ω is advised, in series with a proper capacitor. Pin connection (top view) August 2006 Electronic two-tone ringer ...
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... Block diagram and test circuit 1 Block diagram and test circuit Figure 1. LS1240 block diagram Figure 2. Test circuit 2.72 ⋅ (Hz) 2/9 Telephone Rectifier N.C. line capacitor Rectifier Threshold circuit with hysteresis bridge - Switching frequency generator Telephone Sweep rate GND line control capacitor ...
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... LS1240 2 Electrical characteristics Table 1. Absolute maximum ratings Symbol V Calling voltage ( Hz) continuous AB V Calling voltage ( Hz) 5s ON/10s OFF AB DC Supply current T Operating temperature OP Tstg Storage and junction temperature Table 2. Thermal data Symbol R Maximum thermal resistance junction-ambient thj-amb Tamb = 25° Table 3. Electrical characteristics ...
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... Application schematics 3 Application schematics Figure 3. Typical application with buzzer Figure 4. Typical application with loudspeaker (no transformer needed) 4/9 such that ⏐Z ⏐ > 1 ΚΩ LOAD LS1240 ...
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... LS1240 4 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second Level Interconnect ismarked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label ...
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... Max. 3.32 0.51 1.15 1.65 0.356 0.55 0.204 0.304 10.92 7.95 9.75 2.54 7.62 7.62 6.6 5.08 3.18 3.81 1.52 LS1240 inch Min. Typ. Max. 0.131 0.020 0.045 0.065 0.014 0.022 0.008 0.012 0.430 0.313 0.384 0.100 0.300 0.300 0.260 0.200 ...
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... LS1240 Table 5. SO8 package dimensions Dim D( F( Figure 6. SO8 mechanical drawing mm Min. Typ. Max. 1.75 0.1 0.25 1.65 0.65 0.85 0.35 0.48 0.19 0.25 0.25 0.50 4.8 5.0 5.8 6.2 1.27 3.81 3.8 4.0 0.4 1.27 0.6 Package mechanical data inch Min ...
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... ECOPACK (see 6 Revision history Table 7. Document revision history Date 15-Jul-1998 23-Aug-2006 8/9 Part number Minidip SO8 Minidip SO8 Chapter 4 ) Revision 1 Initial release. Updated the document to reflect the fact that packages are leadfree 2 and part numbers have changed. LS1240 Package Changes ...
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... LS1240 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...