COP410L Datasheet, PDF (10/20 Pages) National Semiconductor (TI) – Single-Chip N-Channel Microcontrollers

Functional Description (Continued)
h An on-chip depletion load device to V_CC
i A Hi-Z input which must be driven to a ‘‘1’’ or ‘‘0’’ by
external components
The above input and output configurations share common
enhancement-mode and depletion-mode devices Specifi-
cally all configurations use one or more of six devices
(numbered 1 – 6 respectively) Minimum and maximum cur-
rent (I_OUT and V_OUT) curves are given in Figure 8 for each
of these devices to allow the designer to effectively use
these I O configurations in designing a COP410L 411L sys-
tem
The SO SK outputs can be configured as shown in a b or
c The D and G outputs can be configured as shown in a or
b Note that when inputting data to the G ports the G out-
puts should be set to ‘‘1’’ The L outputs can be configured
as in d e f or g
An important point to remember if using configuration d or
f with the L drivers is that even when the L drivers are
disabled the depletion load device will source a small
amount of current (See Figure 8 device 2 ) However when
the L port is used as input the disabled depletion device
CANNOT be relied on to source sufficient current to pull an
input to a logic ‘‘1’’
COP411L
If the COP410L is bonded as a 20-pin device it becomes
the COP411L illustrated in Figure 2 COP410L 411L Con-
nection Diagrams Note that the COP411L does not contain
D2 D3 G3 or CKO Use of this option of course precludes
use of D2 D3 G3 and CKO options All other options are
available for the COP411L
a Standard Output
b Open-Drain Output
c Push-Pull Output
TL DD 6919–9
d Standard L Output
TL DD 6919 – 10
e Open-Drain L Output
TL DD 6919 – 11
f LED (L Output)
TL DD 6919–12
g TRI-STATE Push-Pull (L Output)
TL DD 6919 – 13
h Input with Load
(U is depletion device)
TL DD 6919 – 14
i Hi-Z Input
TL DD 6919–15
TL DD 6919 – 16
FIGURE 7 Input and Output Configurations
TL DD 6919 – 17
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