COP420Ll421 L outputs have the following optional configu-rations, illustrated in Figure 5:
a. Standard-an enhancement mode device to ground in conjunction with a depletion-mode device to Vee, com-patible with LSTIL and CMOS input requirements. Avail-able on SO, SK, and all D and G outputs.
b. Open-Draln-an enhancement-mode device to ground only, allowing external pull-up as required by the user's application. Available on SO, SK, and all D and G out-puts.
c. Push-Pull-An enhancement-mode device to ground in conjunction with a depletion-mode device paralleled by an enhancement-mode device to Vee. This configuration has been provided to allow for fast rise and fall times when driving capacitive loads. Available on SO and SK outputs only.
d. Standard L-same as a., but may be disabled. Available on L outputs only.
e. Open Drain L-same as b., but may be disabled.
Avail-able on L outputs only. .
f. LED Direct Drive-an enhancement-mode device to ground and to Vee, meeting the typical current sourcing requirements of the segments of an LED display. The sourcing device is clamped to limit current flow. These devices may be turned off under program control (see Functional Description, EN Register), placing the outputs in a high-impedance state to provide required LED seg-ment blanking for a multiplexed display. Available on L outputs only.
g. TRI-STATE Push-Pull-an enhancement-mode device to ground and Vee. These outputs are TRI-STATE out-puts, allowing for connection of these outputs to a data bus shared by other bus drivers. Available on L outputs only.
COP420LlCOP421 L inputs have the following optional con-figurations:
h. An on-chip depletion load device to Vee.
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 (lOUT and VOUT) curves are given in Figure 6 for each of these devices to allow the designer to effectively use these I/O configurations in designing a COP420Ll421 L 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 outout-puts 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 6, device 2); however, when the L lines are used as inputs, the disabled depletion device
cannot
be relied on to source sufficient current to pull an input to a logic 1.COP421L
If the COP420L is bonded as a 24-pin device, it becomes the COP421 L, illustrated in Figure 2, COP420L/421 L Con-nection Diagrams. Note that the COP421 L does not contain the four general purpose IN inputs (IN3-INo). Use of this option precludes, of course, use of the IN options and the interrupt feature. All other options are available for the COP421L.
COP422L
If the COP421 L is bonded as a 20-pin device, it becomes the COP422L, as illustrated in Figure 2. Note that the COP422L contains all the COP421 L pins except Do, D1, Go, and G1. COP422L also does not allow RAM power supply input as a valid CKO pin option.
TL/DD/BB2S-10 TL/DD/B62S-9
a. Standard Output b. Open-Drain Output
TL/DD/BB2S-11
c. Push-Pull Output
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Functional Description
(Continued)TL/DD/8825-12
d. Standard L Output
TLlDD/8825-15
g. TRI-STATE Push-Pull (L Output)
.~ILE~i ·
TL/DD/8825-13
e. Open-Drain L Output VCC
"~TAf
TLlDD/8825-16
h. Input with Load FIGURE 5. Output Configurations
Typical Performance Characteristics
j
Source Current for SO and SK In Push-Pull Configuration
1.0 I-IH~H--+-++-=+t-t--+-i
Input Current for Lo-L7 when Output Programmed OFF by Software
Source Current for Lo-L7 In TRI-STATE Configuration (High Current Option)
, \
Source Current for Standard
-1000 Output Configuration
DEVICE. #2
Source Current for Lo-L7 In TRI-STATE Configuration (Low Current Option) 1.5 r-'rr-1r-T1--,--,r-r-':"""'T--r--,
l
.JTypical Performance Characteristics
(Continued)C .! g
..
LED Output Source Current -20 (High Current LED Option)
OL-~~~~~~~~~
o
I 2 .1 " 5 6 7 8 9 10 VOH(VOLTS)I 2 .1 4 5 6 7 8 9 10 VOH(VOLTS)
-50 .... 0
C -30 .!
~ -20
-10
LED Output Direct Segment and Digit Drive (High Current Options on Lo-L7; Very High Current Options on 00-03 or Go-G3)
DEVICE' d ANO .4 A~O OEviCE. OR •• 1
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ONE SEGMENTS ...
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10 VCC IVOLTSI
LED Output Direct Segment Drive
Output Sink Current for SO and SK
Output Sink Current for Lo-L7 and Standard Drive Option for 00-03 and GO-G3
-51 VOH· 2.0 V
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-30
-20
-10
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Output Sink Current for GO-G3 and 00-03 with Very High Current Option
100
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!60t-H:---JiL-f---+--t--t-+-+-t-i
.i
a 1 2 3 4 5 6 7 • 9 10 VOL (VOLTS)
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DEVICE .... 1 b ... 1 AND c ... 1
VOL (VOLTS)
Output Sink Current for GO-G3 and 00-03 (High Current Option)
VOL (VOLTS,
~t---<~,..-,r---c_r--""""'I---1f--;~
! 601---t---j~~~-F-t="""1--1
9
2 3 4 5 6 7 8 9 10 VOL (VOLTS)
TLlDD/8825-19 FIGURE 6. COP420L/COP421L/COP422L Input/Output Characteristics
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Typical Performance Characteristics
(Continued)Input Current INo-IN3
~ -150
Source Current for SO and SK In Push-Pull Configuration
1.0 LED Output Source Current (Low Current LED Option)
'\. Output Sink Current for Lo-L7 and Standard Drive Option for 00-03 and GO-G3
VOL (VOLTS)
Input Current for Lo-L7 when Output Programmed OFF by Software Source Current for Lo-L71n TRI-STATE Configuration (High Current Option)
I.S
,
DEVICE U#S1.0
IMIN@ IMIN@
VCC=4.5V VCC=7.5V O.S I - -
HI I I
IMAX @ IMAX @-o
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o 3 4
VOH (VOLTS) LED Output Source Current (High Current LED Option) 40 Output Sink Current for GO-G3 and 00-03 with Very High Current Option
120 r--rT""I....,.-...-:-=,."."..---.
100
Source Current for Standard Configuration Source Current for Lo-L7In TRI·STATE Configuration (LOW Current Option) 1. 5 r---r....,,...,rT"" ... ....,,,DE""V""IC::-E-g.,,.#~5
1.0 ~-H-+-1I-+--++--t--+--I
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VOH (VOLTS) Output Sink Current for SO and SK
VOLIVOLTS) Output Sink Current for GO-G3 and 00-03 (High Current Option) 120' r-...,....,..,..--r __ r--,---r ___ ...-.,
Val (VOLTS) TL/DD/8825-20
FIGURE 7. COP320L/DOP321L/COP322L Input/Output Characteristics
1-148