74HCT595 PDF даташит
Спецификация 74HCT595 изготовлена «Diodes» и имеет функцию, называемую «8-BIT SHIFT REGISTER». |
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Детали детали
Номер произв | 74HCT595 |
Описание | 8-BIT SHIFT REGISTER |
Производители | Diodes |
логотип |
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74HCT595
8-BIT SHIFT REGISTER WITH 8-BIT OUTPUT REGISTER
Description
Pin Assignments
The 74HCT595 is an high speed CMOS device that is designed to
be pin compatable with 74LS low power Schottky types.
An eight bit shift register accpets 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 indepent 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 (OEሻ asserted low the 3-state outputs Q0-
Q7 become active and present th
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.
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 6.0V
• 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:
o Computer peripherals
o Appliances
o 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 <1000 ppm antimony compounds.
Click for Ordering Information
74HCT595
Document number: DS35493 Rev. 3 - 2
1 of 11
www.diodes.com
July 2013
© Diodes Incorporated
No Preview Available ! |
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
Q7S
MR
SHCP
STCP
OE
DS
Q0
Vcc
Description
Parallel Data Output 1
Parallel Data Output 2
Parallel Data Output 3
Parallel Data Output 4
Parallel Data Output 5
Parallel Data Output 6
Parallel Data Output 7
Ground
Serial Data Output
Master Reset Input
Shift Register Clock Input
Storage Register Clock Input
Output Enable Input
Serial Data Input
Parallel Data Output 0
Supply Voltage
Functional Diagram
74HCT595
Logic Diagram
DS
SHCP
MR
STCP
OE
STAGE 0
DQ
FF0
CP
R
STAGES 1 TO 6
DQ
STAGE 7
DQ
FF7
CP
R
Q7S
DQ
LATCH
CP
DQ
LATCH
CP
Q0 Q1 Q2 Q3 Q4 Q5 Q6
Q7
74HCT595
Document number: DS35493 Rev. 3 - 2
2 of 11
www.diodes.com
July 2013
© Diodes Incorporated
No Preview Available ! |
Functional Description and Timing Diagram
74HCT595
SHCP
Control
STCP OE
MR
X X LL
X ↑ LL
X X HL
Input
DS
↑ X LH
X ↑ LH
↑ ↑ LH
H=HIGH voltage state
L=LOW voltage state
↑=LOW to HIGH transition
X= don’t care – high or low (not floating)
NC= No change
Z= high-impedance state
Output
Q7S
Qn
L NC
LL
LZ
Q6S
NC
NC
Q6S
QnS
QnS
Function
Low-level asserted on MR clears shift register
Storage register is unchanged
Empty shift register transferred to storage register
Shift register remains clear; All Q ouputs in Z state
HIGH is shifted into first stage of Shift Register Contents of each
register shifted to next register
The content of Q6S has been shifted to Q7S and now appears on
device pin Q7S
Contents of shift register copied to storage register
With output now in active state, the storage resister contents
appear on Q outputs
Contents of shift register copied to output register then shift register
shifted.
74HCT595
Document number: DS35493 Rev. 3 - 2
3 of 11
www.diodes.com
July 2013
© Diodes Incorporated
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