Siemens SAE800 free download

File name SAE800.pdf

Programmable Single-/Dual-/Triple- Tone Gong Preliminary Data SAE 800 Bipolar IC Features q q q q q q q q q 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 µA Constant current output stage (no oscillation) High-efficiency power stage Short-circuit protection Thermal shutdown P-DIP-8-4 P-DSO-8-1 Type w SAE 800 w SAE 800 G w New type Ordering Code Q67000-A8339 Q67000-A8340 Package P-DIP-8-4 P-DSO-8-1 (SMD) 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 f0 = 13.2 kHz for example, the IC will issue in triple-tonemode the minor and major third e2 ­ C sharp ­ a, corresponding to 660 Hz ­ 550 Hz ­ 440 Hz, in dual-tone-mode the minor third e2 ­ C sharp, and in single-tone-mode the tone e2 (derived from the fundamental frequency f0 ; f1 = f0 / 20, f2 = f0 / 24, f3 = f0 / 30). When it is not triggered, the IC is in a standby state and only draws a few µA. 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 09.94 SAE 800 SAE 800 SAE 800 G Pin Configuration (top view) Pin Definitions and Functions Pin 1 2 3 4 5 6 7 8 Symbol GND Q Function Ground Output Supply Voltage Loudness Control Oscillator Resistor Oscillator Capacitor Trigger 2 (dual tone) Trigger 1 (single tone) VS L ROSC COSC E2 E1 Functional Description (cont'd) An RC combination is needed to generate the fundamental frequency (pin ROSC , COSC). The volume can be adjusted with another resistor (pin L). The loudspeaker must be connected directly between the output Q and the power supply VS . The current-sink principle combined with an integrated 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 SAE 800 Block Diagram Semiconductor Group 3 SAE 800 Circuit Description Trigger Positive pulses on inputs E1 and/or E2 trigger the IC. The hold feedback in the logic has a delay of several milliseconds. After this delay has elapsed, the tone sequence is started. This prevents parasitic spikes from producing any effect on the trigger pins. The following table shows the trigger options: E1 Triggered Grounded/open Triggered Oscillator This is a precision triangle oscillator with an external time constant (R x C). Capacitor CC on pin COSC is charged by constant current to 1 V and then discharged to 0.5 V. The constant current is obtained on pin ROSC with an external resistor RR to ground. When the voltage on COSC is building up, the logic is reset at 350 mV. This always ensures that a complete tone sequence is issued. If the oscillator pin is short-circuited to GND during operation, the sequence is repeated. E2 Triggered Triggered