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參數(shù)資料
| 型號： | 74HCT574 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-Bit Synchronous Up/Down Counters (Dual Clock With Clear) 16-SO -40 to 85 |
| 中文描述： | 八路D型觸發(fā)器，上升沿觸發(fā)，三態(tài) |
| 文件頁數(shù)： | 2/7頁 |
| 文件大小： | 57K |
| 代理商： | 74HCT574 |
December 1990
2
Philips Semiconductors
Product specification
Octal D-type flip-flop; positive
edge-trigger; 3-state
74HC/HCT574
FEATURES
3-state non-inverting outputs for
bus oriented applications
8-bit positive edge-triggered
register
Common 3-state output enable
input
Independent register and 3-state
buffer operation
Output capability: bus driver
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT574 are high-speed
Si-gate CMOS devices and are pin
compatible with low power Schottky
TTL (LSTTL). They are specified in
compliance with JEDEC standard
no. 7A.
The 74HC/HCT574 are octal D-type
flip-flops featuring separate D-type
inputs for each flip-flop and
non-inverting 3-state outputs for bus
oriented applications. A clock (CP)
and an output enable (OE) input are
common to all flip-flops.
The 8 flip-flops will store the state of
their individual D-inputs that meet the
set-up and hold time requirements on
the LOW-to-HIGH CP transition.
When OE is LOW, the contents of the
8 flip-flops are available at the
outputs.
When OE is HIGH, the outputs go to
the high impedance OFF-state.
Operation of the OE input does not
affect the state of the flip-flops.
The “574” is functionally identical to
the “564”, but has non-inverting
outputs.
The “574” is functionally identical to
the “374”, but has a different pinning.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
×
V
CC2
×
f
i
+ ∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V
2.
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PHL/
t
PLH
f
max
C
I
C
PD
propagation delay CP to Q
n
maximum clock frequency
input capacitance
power dissipation capacitance per flip-flop
C
L
= 15 pF; V
CC
= 5 V
14
123
3.5
22
15
76
3.5
25
ns
MHz
pF
pF
notes 1 and 2
相關PDF資料 |
PDF描述 |
|---|---|
| 74HC574 | Octal D-type flip-flop; positive edge-trigger; 3-state |
| 74HCT583 | 4-Bit Synchronous Up/Down Counters (Dual Clock With Clear) 16-TSSOP -40 to 85 |
| 74HC583 | 4-bit full adder with fast carry |
| 74HCT643 | Dual 4-Input Positive-NAND Gates 14-SSOP -40 to 85 |
| 74HC643 | Octal bus transceiver; 3-state; true/inverting |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 74HCT574 86 | 制造商:RCA 功能描述:74HCT574 |
| 74HCT57486 | 制造商:RCA 功能描述:74HCT574 |
| 74HCT574AN | 制造商: 功能描述: 制造商:AVX Corporation 功能描述: |
| 74HCT574D | 功能描述:觸發(fā)器 OCTAL D-TYPE POS EDGE 3-S RoHS:否 制造商:Texas Instruments 電路數(shù)量:2 邏輯系列:SN74 邏輯類型:D-Type Flip-Flop 極性:Inverting, Non-Inverting 輸入類型:CMOS 輸出類型: 傳播延遲時間:4.4 ns 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:X2SON-8 封裝:Reel |
| 74HCT574D,652 | 功能描述:觸發(fā)器 OCTAL D-TYPE POS RoHS:否 制造商:Texas Instruments 電路數(shù)量:2 邏輯系列:SN74 邏輯類型:D-Type Flip-Flop 極性:Inverting, Non-Inverting 輸入類型:CMOS 輸出類型: 傳播延遲時間:4.4 ns 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:X2SON-8 封裝:Reel |
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