TABLE 3-1: PINOUT DESCRIPTION (CONTINUED)
TC1270A TC1270AN TC1271A
(Push-Pull, (Open-Drain, (Push-Pull,
active low) active low) active high)
I ST (1) Manual Reset input pin
This input allows a push button switch to be
directly connected to the
TC1270A/70AN/71A’s MR pin, which can then
be used to force a system Reset. The input fil-
ter (ignores) noise pulses that occur on the
H = Switch is open (internal pull-up resistor
pulls signal high). State of the RST/RST
pin determined by other system condi-
L = Switch is depressed (shorted to ground).
This forces the RST/RST pin Active.
4 VDD — Power Supply Voltage
1 — NC — — No Connection
Note 1: The MR pin has an internal weak pull-up (18.5 kΩ typical).
© 2007 Microchip Technology Inc.