Programmable SAE 800 Single-/Dual-/Triple- Tone Gong Pb-free lead plating RoHS compliant Bipolar IC Features Supply voltage range 2.8 V to 18 V Few external components (no electrolytic capacitor) 1 tone, 2 tones, 3 tones programmable Loudness control Typical standby current 1 A Constant current output stage (no oscillation) High-efficiency power stage Short-circuit protection PG-DIP-8-4 Thermal shutdown PG-DSO-8-1 Type Ordering Code Package SAE 800 Q67000-A8339 PG-DIP-8-4 SAE 800 G Q67000-A8340 PG-DSO-8-1 (SMD) New type Functional Description The SAE 800 is a single-tone, dual-tone or triple-tone gong IC designed for a very wide supply voltage range. If the oscillator is set to f = 13.2 kHz for example, the IC will issue in triple-tone- 0 2 mode the minor and major third e C sharp a, corresponding to 660 Hz 550 Hz 440 Hz, in 2 2 dual-tone-mode the minor third e C sharp, and in single-tone-mode the tone e (derived from the fundamental frequency f f = f / 20, f = f / 24, f = f / 30). 0 1 0 2 0 3 0 When it is not triggered, the IC is in a standby state and only draws a few A. It comes in a compact P-DIP-8-1 or P-DSO-8-1 (SMD) package and only requires a few external components. Semiconductor Group 1 02.05SAE 800 SAE 800 SAE 800 G Pin Configuration (top view) Pin Definitions and Functions Pin Symbol Function 1 GND Ground 2 Q Output 3 V Supply Voltage S 4 L Loudness Control 5 R Oscillator Resistor OSC 6 C Oscillator Capacitor OSC 7 E2 Trigger 2 (dual tone) 8 E1 Trigger 1 (single tone) Functional Description (contd) An RC combination is needed to generate the fundamental frequency (pin R , C ). The volume OSC OSC can be adjusted with another resistor (pin L). The loudspeaker must be connected directly between the output Q and the power supply V . The current-sink principle combined with an integrated S thermal shutdown (with hysteresis) makes the IC overload-protected and shortcircuit-protected. There are two trigger pins (E1, E2) for setting single-tone, dual-tone or triple-tone mode. Semiconductor Group 2