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參數(shù)資料
| 型號： | SN54HCT74W |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Fixed-40kHz Flyback PWM Voltage-Mode Controller with 500V Maximum Startup and Programmable Burst-Mode Standby; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50 |
| 中文描述： | 雙路D類上升沿觸發(fā)器，沒有明確的和預(yù)置觸發(fā)器 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 101K |
| 代理商： | SN54HCT74W |
SN54HCT74, SN74HCT74
DUAL D-TYPE POSITIVE-EDGE-TRIGGERED FLIP-FLOPS
WITH CLEAR AND PRESET
SCLS169B – DECEMBER 1982 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Inputs Are TTL-Voltage Compatible
Package Options Include Plastic
Small-Outline (D), Thin Shrink
Small-Outline (PW), and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
The ’HCT74 contain two independent D-type
positive-edge-triggered flip-flops. A low level at
the preset (PRE) or clear (CLR) inputs sets or
resets the outputs regardless of the levels of the
other inputs. When PRE and CLR are inactive
(high), data at the data (D) input meeting the setup
time requirements are transferred to the outputs
on the positive-going edge of the clock (CLK)
pulse. Clock triggering occurs at a voltage level
and is not directly related to the rise time of CLK.
Following the hold-time interval, data at the
D input may be changed without affecting the
levels at the outputs.
The SN54HCT74 is characterized for operation
over the full military temperature range of –55
°
C
to 125
°
C. The SN74HCT74 is characterized for
operation from –40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
OUTPUT
PRE
CLR
CLK
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
H
L
L
X
X
H
H
H
H
H
L
H
H
L
L
H
H
H
L
X
Q0
Q0
This configuration is unstable; that is, it does not
persist when PRE or CLR returns to its inactive
(high) level.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1CLR
1D
1CLK
1PRE
1Q
1Q
GND
V
CC
2CLR
2D
2CLK
2PRE
2Q
2Q
SN54HCT74 . . . J OR W PACKAGE
SN74HCT74 . . . D, N, OR PW PACKAGE
(TOP VIEW)
3
2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
2D
NC
2CLK
NC
2PRE
1CLK
NC
1PRE
NC
1Q
1
1
N
2
2
V
2
1
G
N
SN54HCT74 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
Copyright
1997, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
parameters.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN54HCU04FK | Fixed-40kHz Flyback PWM Voltage-Mode Controller with 500V Maximum Startup and Programmable Burst-Mode Standby; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50 |
| SN54HCU04W | HEX INVERTERS |
| SN54L00 | Quadruple 2input positive-nand gates |
| SN74H00 | Quadruple 2input positive-nand gates |
| SN54L01 | Positive-nand gates and inverters with oepn-collector outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN54HCU04J | 制造商:Texas Instruments 功能描述:HEX INVERTER - Rail/Tube 制造商:Texas Instruments 功能描述:Inverter 6-Element CMOS 14-Pin CDIP Tube |
| SN54L00W | 制造商:MAJOR 功能描述: |
| SN54L46J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN54L51J | 制造商:Texas Instruments 功能描述: |
| SN54L74T | 制造商:Texas Instruments 功能描述:Flip Flop, Dual, D Type, 14 Pin, Metal, Flat Pack |
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