SAA1305T Datasheet, PDF (4/32 Pages) Panasonic Semiconductor – On/off logic IC

Philips Semiconductors
On/off logic IC
Product specification
SAA1305T
PINNING
SYMBOL PIN
DESCRIPTION
D0
1 input D0; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D1
2 input D1; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D2
3 input D2; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D3
4 input D3; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D4
5 input D4; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D5
6 input D5; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D6
7 input D6; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
D7
8 input D7; generates a reset pulse on pin RP and a LOW-level voltage on pin CHI
ON/OFF
9 on/off output (off is active LOW); for controlling the enable of a separate power supply IC from the
microcontroller
RES
10 reset input (active LOW); for power-on or system reset for the IC
WD
11 Watchdog timer trigger input signal from the microcontroller
TS
TST
OSC1
12 timer start input (active LOW); to trigger the V_L (is an undervoltage) timer (250 ms)
13 test purpose input; must be connected to V_SS
14 RC oscillator output (32.768 kHz)
OSC2
15 RC oscillator input (32.768 kHz)
XTAL1
16 crystal oscillator output (32.768 kHz)
XTAL2
SDA
17 crystal oscillator input (32.768 kHz)
18 I²C-bus serial data input/output; interface to the microcontroller
V_SS
19 ground supply (0 V)
SCL
20 I²C-bus serial clock line input; interface to the microcontroller
V_DD
21 supply voltage; 5 V ±10% with a current consumption of maximum 200 µA (without LED current)
LED
22 light emitting diode output; to drive a LED up to 20 mA (high side switch to V_DD)
RP
23 reset pulse output
CHI
24 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 V_L 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