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PDF 74AHCT595 Data sheet ( Hoja de datos )
| Número de pieza | 74AHCT595 | |
| Descripción | 8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER | |
| Fabricantes | Diodes | |
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74AHCT595
8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER
Description
The 74AHCT595 is an advanced high speed CMOS device that is
designed to be pin compatable with 74LS low power Schottky types.
An eight bit shift register accepts data from the serial input (DS) on
each positive transition of the shift register clock (STCP). When
asserted low, the reset function (MR) sets all shift register values to
zero and is independent of all clocks.
Data from the input serial shift register is placed in the output register
with a rising pulse on the storages resister clock (SHCP). With the
output enable (OE asserted low the 3-state outputs Q0-Q7 become
active and present.
All registers capture data on rising edge and change output on the
falling edge. If both clocks are connected together, the input shift
register is always one clock cycle ahead of the output register.
Pin Assignments
Features
Supply Voltage Range from 4.5V to 5.5V
Sinks or sources 8mA at VCC = 4.5V
CMOS low power consumption
Schmitt Trigger Action at All Inputs
Inputs accept up to 5.5V
ESD Protection Tested per JESD 22
Exceeds 200-V Machine Model (A115-A)
Exceeds 2000-V Human Body Model (A114-A)
Exceeds 1000-V Charged Device Model (C101C)
Latch-Up Exceeds 250mA per JESD 78, Class II
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
General Purpose Logic
Serial to Parallel Data conversion
Capture and hold data for extended periods of time.
Allow simple serial bit streams from a microcontroller to control as
many peripheral lines as needed.
Wide array of products such as:
Computer peripherals
Appliances
Industrial control
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Click here for ordering information, located at the end of datasheet
74AHCT595
Document number: DS35487 Rev. 3 - 2
1 of 10
www.diodes.com
June 2013
© Diodes Incorporated
1 page  
74AHCT595
Switching Characteristics
Symbol /
Parameter
Pins
Test Conditions
fMAX
Maximum
Frequency
tW
Pulse Width
SHCP or STCP
SHCP
HIGH or LOW
STCP
HIGH or LOW
Figure 1
Figure 1
Figure 1
tSU
Set-up Time
MR LOW
DS to SHCP
SHCP to STCP
Figure 1
Figure 1
Figure 1
tH
Hold Time
DS to SHCP
Figure 1
tREC
Recovery Time MR to SHCP
Figure 1
VCC
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
4.5V to 5.5V
TA = +25°C
Min Typ Max
130 170
5.0
5.0
5.0
3.0
5.0
2.0
3.0
-40°C to +85°C
Min Max
110
5.0
5.0
5.0
3.0
5.0
2.0
3.0
-40°C to +125°C
Unit
Min Max
90 MHz
5.0
5.0 ns
5.0
3.0 ns
5.0 ns
2.0 ns
3.0 ns
SHCP to Q7S
tPD
Propagation
Delay
STCP to Qn
MR to Q7S
tEN
Enable Time
OE to Qn
tDIS
Disable Time
OE to Qn
Figure 1
4.5V to 5.5V
3.8 8.2
1.0
9
1.0 10
CL = 15pF
ns
Figure 1
4.5V to 5.5V
5.2 10
1.0
11
1.0
12
CL = 50pF
Figure 1
CL = 15pF
4.5V to 5.5V
4 7.4 1.0
8.5
1.0
9.5
ns
Figure 1
CL = 50pF
4.5V to 5.5V 5.3 9
1.0 10.5 1.0 11.5
Figure 1
CL = 15pF
4.5V to 5.5V
4.6 8.2
1.0
9.5
1.0 10.5
ns
Figure 1
4.5V to 5.5V 5.8 10.5 1.0 11.5 1.0 12.5
CL = 50pF
Figure 1
4.5V to 5.5V 4.8 9 1.0 11 1.0 12
CL = 15pF
ns
Figure 1
CL = 50pF
4.5V to 5.5V
6.2 11.6 1.0
13
1.0 14.5
Figure 1
CL = 15pF
4.5V to 5.5V
3.6 6.9
1.0
8
1.0
9
ns
Figure 1
CL = 50pF
4.5V to 5.5V
5.8 10.3 1.0
11
1.0
12
Operating Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter
Test
Conditions
VCC = 5V
Typ
Cpd
Power dissipation
capacitance
f = 1 MHz all outputs switching-no load
42
Unit
pF
74AHCT595
Document number: DS35487 Rev. 3 - 2
5 of 10
www.diodes.com
June 2013
© Diodes Incorporated
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