• High Capacitive Load Drive Capability – 1000pF
in 25nsec Typ.
• Short Delay Times – 30nsec Typ.
• Matched Rise, Fall and Delay Times
• Low Supply Current:
- With Logic "1" Input – 1mA
- With Logic "0" Input – 100µA
• Low Output Impedance – 7Ω
• Latch-Up Protected: Wi ll Withstand 0.5A Revers e
Current
• Input Will Withstand Negative Inputs Up to 5V
• ESD Protected – 4kV
• Pinouts Sa me as TC426/TC427/TC428
Applications
•
•
•
Device Selection Table
Part NumberPackageTemp. Range
TC4426ACOA8-Pin SOIC0°C to +70°C
TC4426ACPA8- Pi n PDI P0°C to +70°C
TC4426AEOA8-Pin SOIC-40°C to +85°C
TC4426AEPA8-Pin PDIP-40°C to +85°C
TC4426AMJA8-Pin CERDIP-55°C to +125°C
TC4427ACOA8-Pin SOIC0°C to +70°C
TC4427ACPA8- Pi n PDI P0°C to +70°C
TC4427AEOA8-Pin SOIC-40°C to +85°C
TC4427AEPA8-Pin PDIP-40°C to +85°C
TC4427AMJA8-Pin CERDIP-55°C to +125°C
TC4428ACOA8-Pin SOIC0°C to +70°C
TC4428ACPA8- Pi n PDI P0°C to +70°C
TC4428AEOA8-Pin SOIC-40°C to +85°C
TC4428AEPA8-Pin PDIP-40°C to +85°C
TC4428AMJA8-Pin CERDIP-55°C to +125°C
Package Type
8-Pin PDIP/SOIC/CERDIP
1
NC
2
IN A
TC4426A
3
GND
4
IN B
2,47,5
Inverting
NC
1
2
IN A
TC4427A
3
GND
4
IN B
2,47,5
Noninverting
NC = No internal connection.
NOTE: SOIC pinout is identical to DIP.
8
7
6
5
8
7
6
5
NC
OUT A
V
DD
OUT B
NC
OUT A
V
DD
OUT B
NC
IN A
GND
IN B
1
2
TC4428A
3
4
2
4
Differential
NC
8
OUT
7
V
6
DD
5
OUT B
7
5
General Description
The TC4426A/TC4427A/TC4428A are improved
versions of the earlier TC426/TC427/TC428 family of
buffer/drivers (with which they are pin compatible).
They will not latch up under any conditions within their
power and voltage ratings. They are not subject to
damage when up to 5V of noise spiking (of either
polarity) occurs on the gro und pin. They c an accept,
without damage or logic upset, up to 500m A of revers e
current (of either polarity) being forced back into their
outputs. All terminals are fully protected against up to
4kV of electrostatic discharge.
As MOSFET drivers, the TC4426A/TC4427A/
TC4428A can easily switch 1000pF gate capacitances
in under 30nsec, and provide low enough impedances
in both the ON and OFF states to ensure the
MOSFET's intended state will not be affected, even by
large transients.
2002 Microchip Technology Inc.DS21423B-page 1
TC4426A/TC4427A/TC4428A
Functional Block Diagram
Inverting
Outputs
2mA
300mV
Noninverting
Outputs
Input
4.7V
TC4426A/TC4427A/TC4428A
GND
Effective Input
C = 12pF
V
DD
Output
NOTES: 1. TC4426A has 2 inverting drivers; TC4427A has 2 noninverting drivers.
2. TC4428A has one inverting and one noninverting driver.
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:PIN FUNCTION TABLE
Pin No.
(8-Pin PDIP,
SOIC, CERDIP)
1NCNo connect.
2IN A
3GNDGround.
4IN B
5OUT B
6V
7OUT A
8NCNo connect.
SymbolDescription
DD
2002 Microchip Technology Inc.DS21423B-page 5
TC4426A/TC4427A/TC4428A
3.0APPLICATIONS INFORMATION
FIGURE 3-1:SWITCHING TIME TEST CIRCUIT
Input
2
4
Input: 100kHz,
square wave,
= t
t
RISE
V
DD
FALL
= 18V
6
3
≤ 10nsec
4.7µF
7
5
0.1µF
Output
CL = 1000pF
Input
V
Output
+5V
Input
0V
V
DD
Output
0V
+5V
0V
DD
0V
10%
10%
t
D1
90%
t
D1
t
F
10%
Inverting Driver
90%
t
R
10%
Noninverting Driver
t
D2
90%
90%
t
D2
90%
10%
t
R
10%
90%
t
F
DS21423B-page 6 2002 Microchip Technology Inc.
TC4426A/TC4427A/TC4428A
510.0
515.0
ge
T
5
)
C
pF
C
pF
pF
C
C
pF
00-50
0
t
t
SE
5.0
5
0
515.0
0
0
ge
5
)
C
pF
C
C
pF
5101520
t
50050100150
e
C
pF
8V
)
t
t
4.0TYPICAL CHARACTERISTICS
Note:The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are pro vided for information al purposes only. The performance characteris tics listed herei n are
not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Rise Time vs. Supply Volta
100
80
60
(nsec)
40
RISE
t
20
0
CL = 100
5.0
= 2200
7.
= 1500
12.
(V
= +2
= 470
Effect of Input Amplitude on Delay
110
100
90
80
70
60
50
40
Delay Time (nsec)
30
20
t
D1
t
D2
12 3 4 5 67 8 9
V
(V)
DD
CL = 1000pF
V
= 10V
DD
Fall Time vs. Supply Volta
°
C
17.5
100
80
60
(nsec)
40
FALL
t
2
= 1500
7.
10.
12.
(V
= 470
= +2
°C
17.5
Propagation Delay Time vs. Supply Voltage
60
55
50
45
40
35
30
Delay Time (nsec)
25
20
0
t
D1
V
(V)
DD
CL = 1000pF
Rise and Fall Times vs. Temperature
28
CL = 1000pF
26
V
DD
24
22
20
Time (nsec)
18
16
14
-1
= 18V
RI
50100150
TEMPERATURE (°C)
Propagation Delay Time vs. Temperatur
40
= 1000
35
30
25
Delay Time (nsec)
20
15
= 1
-100-
TEMPERATURE (C
2002 Microchip Technology Inc.DS21423B-page 7
TC4426A/TC4427A/TC4428A
5
C
5
C
0
500100015002000
0
0
0
30
)
y
(
)
8V
C
pF
C
pF
C
pF
C
pF
)
0
500
000
5002000
30
0
0
0
y
C
pF
C
pF
C
pF
C
pF
5
0
520
5
C
5
C
0
5001000150020002500
0
0
0
30
0
50
60
d
8V
C
)
900MHz
600MHz
z
z
0
500
000
50020002500
60
50
0
30
0
0
0
C
)
900MHz
600MHz
z
z
TYPICAL CHARACTERISTICS (CONTINUED)
High-State Output Resistance
30
= 12
T
A
25
20
= 12
T
A
(Ω)
15
DS(ON)
10
R
5
0
05101520
V
(V)
DD
Supply Current vs. Frequenc
60
50
40
mA
PPLY
2
I
1
= 2200
FREQUENCY (KHz
= 1500
= 1000
= 1
= 100
2500
Low State Output Resistance
30
25
= 12
T
A
20
(Ω)
15
= 12
T
A
DS(ON)
10
R
5
0
0
1
V
(V)
DD
Supply Current vs. Capacitance Loa
4
(mA)
2
SUPPLY
I
1
(pF
1
= 1
200MH
20MH
80
70
60
50
(mA)
40
PPLY
I
2
1
Supply Current vs. Frequenc
V
= 12V
DD
1
FREQUENCY (KHz
1
= 2200
= 1500
= 1000
= 100
2500
Supply Current vs.Capacitance Load
80
V
= 12V
DD
70
(mA)
4
SUPPLY
I
2
1
1
1
(pF
200MH
20MH
DS21423B-page 8 2002 Microchip Technology Inc.
TC4426A/TC4427A/TC4428A
0
500
000
1500
2000
5
0
5
0
(
)
C
pF
C
pF
C
pF
C
pF
5
C
BOTH INPUTS = 1
0
5
01520
800
00
600
500
00
00
00
0
300
900
ge
0
0
500
000
50020002500
30
5
5
0
5
0
C
L
)
900MHz
600MHz
z
20MHz
00-50050100150
000
900
800
00
600
00
300
00
00
0
500
00
e
V
8V
0
0
TYPICAL CHARACTERISTICS (CONTINUED)
40
V
35
30
25
(mA)
20
PPLY
1
I
1
7
(mA)
4
QUIESCENT
I
2
BOTH INPUTS =
1
Supply Current vs. Frequency
= 6V
DD
1
FREQUENCY
KHz
Quiescent Supply Current vs. Volta
1
V
(V)
DD
= 2200
= 1500
= 1000
= 100
= 2
2500
Supply Current vs. Capacitance Load
40
V
= 6V
DD
35
2
(mA)
1
SUPPLY
I
1
1
1
(pF
Quiescent Supply Current vs. Temperatur
11
1
BOTH INPUTS =
7
(mA)
4
QUIESCENT
I
BOTH INPUTS =
2
1
-1
TEMPERATURE (°C)
200MH
= 1
2002 Microchip Technology Inc.DS21423B-page 9
TC4426A/TC4427A/TC4428A
3
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
.
)
)
)
)
)
)
)
.
.
)
)
)
)
)
)
)
)
)
)
)
)
)
3
)
)
)
)
)
5.0PACKAGING INFORMATION
Package mar k ing data not available at this time.
5.1Package Dimensions
8-Pin Plastic DIP
.260 (6.60
.240 (6.10
.045 (1.14
.030 (0.76
.200 (5.08
.140 (3.56
.150 (3.81
.115 (2.92
8-Pin CDIP (Narrow
.400 (10.16
.348 (8.84
.110 (2.79
.090 (2.29
.022 (0.56
.015 (0.38
.110 (2.79
.090 (2.29
.070 (1.78
.040 (1.02
.040 (1.02
.020 (0.51
.300 (7.62
.230 (5.84
.310 (7.87
.290 (7.37
.015 (0.38
.008 (0.20
.400 (10.16
310 (7.87
Dimensions: inches (mm)
.055 (1.40) MAX
.200 (5.08
.160 (4.06
.200 (5.08
.125 (3.18
.400 (10.16
.370 (9.40
.065 (1.65
.045 (1.14
.020 (0.51
.016 (0.41
.020 (0.51) MIN
.040 (1.02
.020 (0.51
.150 (3.81
.015 (0.38
.008 (0.20
.320 (8.13
.290 (7.37
.400 (10.16
.320 (8.13
Dimensions: inches (mm)
DS21423B-page 10 2002 Microchip Technology Inc.
Package Dimensions (Continued)
.
8
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
8-Pin SOIC
TC4426A/TC4427A/TC4428A
.050 (1.27) TYP
.197 (5.00
.189 (4.80
.020 (0.51
.013 (0.33
.157 (3.99
.150 (3.81
.010 (0.25
.004 (0.10
.244 (6.20
.228 (5.79
.069 (1.75
.053 (1.35
.010 (0.25
.007 (0.18
.050 (1.27
.016 (0.40
Dimensions: inches (mm)
2002 Microchip Technology Inc.DS21423B-page 11
TC4426A/TC4427A/TC4428A
NOTES:
DS21423B-page 12 2002 Microchip Technology Inc.
TC4426A/TC4427A/TC4428A
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.Your local Microchip sales office
2.The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3.The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.DS21423B-page13
TC4426A/TC4427A/TC4428A
NOTES:
DS21423B-page14 2002 Microchip Technology Inc.
TC4426A/TC4427A/TC4428A
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with
express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property
rights.
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The Company’s quality system processes and
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®
code hoppin g
2002 Microchip Technology Inc.DS21423B-page 15
M
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