SAA1305T |
RFQ for SAA1305T Required Field |
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| Technical/Catalog Information | SAA1305T/N1,112 |
| Vendor | NXP Semiconductors |
| Category | Integrated Circuits (ICs) |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | SAA1305T N1,112 SAA1305TN1,112 |
| Product | Manufacturers | Pack | D/C |
| SAA1305T | - | SOP24 | - |
The SAA1305T is an on/off logic IC, intended for use in car radios to interface between a microcontroller and various
input signals such as ignition, low supply detection, on/off key and external control signals.
The SAA1305T can replace an existing on/off logic built-up with discrete components.
The SAA1305T contains 8 inputs with accurate Schmitt triggers and clamp circuits. The main function of this IC is an intelligent I/O expander with 2 modes of operation:
1. Normal I/O expander: the microcontroller (master) is running and the SAA1305T acts like a slave.
2. Sleep mode of the total application: the microcontroller is stopped and the SAA1305T acts like a master. During an event, the microcontroller is awakened.
The communication with the IC is performed via the I2C-bus (400 kHz). Extra functions of the SAA1305T are:
· LED blinker circuit
· One-day watch
· Watchdog timer.
Features |
| · 8 accurate Schmitt trigger inputs with clamp circuits· Very low quiescent current· Reset generator circuit· Changed information output· On/off output to control a regulator IC which supplies the microcontroller· 32.768 kHz RC oscillator and/or a 32.768 kHz crystal oscillator· No delayed reset needed (start-up behaviour oscillator fixed by internal logic)· Watchdog timer function· Blinking LED oscillator with drive circuit for LED· Watch function. |
| SYMBOL | PARAMETER | CONDITIONS | MIN. | MAX. | UNIT |
| VDD | supply voltage | operating | -0.5 | +6.5 | V |
| Iq | quiescent supply current | VDD = 5 V; standby mode | - | 200 | A |
| VI(n) | input voltage on pins SDA, SCL, RES, WD and TS D0 to D7 |
fosc = 32 kHz with 5 k series resistor |
-0.5 -0.5 |
+6.5 +17 |
V V |
| VO(n) | output voltage on pins CHI, RP, ON/OFF and LED |
fosc = 32 kHz | -0.5 | +6.5 | V |
| fSCL(max) | maximum SCL clock frequency | - | 400 | kHz | |
| Tvj | virtual junction temperature | - | 150 | °C | |
| Tstg | storage temperature | -65 | +150 | °C | |
| Tamb | ambient temperature | -40 | +85 | °C |
