Philips Semiconductors
Product specification
On/off logic IC
SAA1305T
PINNING
SYMBOL
PIN
DESCRIPTION
D0
1
2
3
4
5
6
7
8
9
input D0; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D1; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D2; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D3; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D4; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D5; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D6; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
input D7; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D1
D2
D3
D4
D5
D6
D7
ON/OFF
on/off output (off is active LOW); for controlling the enable of a separate power supply IC from the
microcontroller
RES
WD
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
reset input (active LOW); for power-on or system reset for the IC
Watchdog timer trigger input signal from the microcontroller
timer start input (active LOW); to trigger the VL (is an undervoltage) timer (250 ms)
test purpose input; must be connected to VSS
TS
TST
OSC1
OSC2
XTAL1
XTAL2
SDA
VSS
RC oscillator output (32.768 kHz)
RC oscillator input (32.768 kHz)
crystal oscillator output (32.768 kHz)
crystal oscillator input (32.768 kHz)
I2C-bus serial data input/output; interface to the microcontroller
ground supply (0 V)
SCL
VDD
I2C-bus serial clock line input; interface to the microcontroller
supply voltage; 5 V ±10% with a current consumption of maximum 200 µA (without LED current)
LED
RP
light emitting diode output; to drive a LED up to 20 mA (high side switch to VDD
)
reset pulse output
CHI
change information output (active LOW); note 1
Note
1. The following results in a LOW-level voltage on pin CHI:
a) A change on any of the (non-masked) inputs D0 to D7.
b) A device reset.
c) An alarm or VL timer event.
d) An oscillator fault or a failed I2C-bus read sequence after a change information signal.
e) A failed Watchdog timer trigger sequence.
2004 Jan 15
4
PANASONIC [ PANASONIC ]
