74HC173D [NXP]
Quad D-type flip-flop; positive-edge trigger; 3-state; 四D- FL型IP- FL操作;正边沿触发;三态
| 型号： | 74HC173D |
| 厂家： | 
NXP |
| 描述： | Quad D-type flip-flop; positive-edge trigger; 3-state |
| 文件： | 总3页 (文件大小：46K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Philips Semiconductors
Product specification
Quad D-type flip-flop; positive-edge trigger; 3-state
74HC/HCT173
synchronously with the LOW-to-HIGH clock (CP)
FEATURES
transition. When one or both En inputs are HIGH one
set-up time prior to the LOW-to-HIGH clock transition, the
register will retain the previous data. Data inputs and clock
enable inputs are fully edge-triggered and must be stable
only one set-up time prior to the LOW-to-HIGH clock
transition.
• Gated input enable for hold (do nothing) mode
• Gated output enable control
• Edge-triggered D-type register
• Asynchronous master reset
• Output capability: bus driver
• ICC category: MSI
The master reset input (MR) is an active HIGH
asynchronous input. When MR is HIGH, all four flip-flops
are reset (cleared) independently of any other input
condition.
GENERAL DESCRIPTION
The 3-state output buffers are controlled by a 2-input NOR
gate. When both output enable inputs (OE1 and OE2) are
LOW, the data in the register is presented to the Qn
outputs. When one or both OEn inputs are HIGH, the
outputs are forced to a high impedance OFF-state. The
3-state output buffers are completely independent of the
register operation; the OEn transition does not affect the
clock and reset operations.
The 74HC/HCT173 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/HCT173 are 4-bit parallel load registers with
clock enable control, 3-state buffered outputs (Q0 to Q3)
and master reset (MR).
When the two data enable inputs (E1 and E2) are LOW, the
data on the Dn inputs is loaded into the register
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
TYPICAL
SYMBOL
PHL/ tPLH
PARAMETER
propagation delay
CONDITIONS
UNIT
HC
HCT
t
CL = 15 pF; VCC = 5 V
CP to Qn
MR to Qn
17
13
17
17
ns
ns
fmax
CI
maximum clock frequency
input capacitance
88
3.5
20
88
MHz
pF
3.5
20
CPD
power dissipation
notes 1 and 2
pF
capacitance per flip-flop
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
2
PD = CPD × VCC2 × fi + ∑ (CL × VCC × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
2
∑ (CL × VCC × fo) = sum of outputs
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC −1.5 V
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information”.
2
Philips Semiconductors
Product specification
Quad D-type flip-flop; positive-edge trigger; 3-state
74HC/HCT173
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL
PARAMETER
UNIT
WAVEFORMS
VCC
(V)
+25
−40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
CP to Qn
55
20
16
175
35
30
220
44
37
265
53
45
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2.0 Fig.6
4.5
6.0
tPHL
propagation delay
MR to Qn
44
16
13
150
30
26
190
38
33
225
45
38
2.0 Fig.7
4.5
6.0
t
t
t
PZH/ tPZL 3-state output enable time
52
19
15
150
30
26
190
38
33
225
45
38
2.0 Fig.8
4.5
6.0
OEn to Qn
PHZ/ tPLZ 3-state output disable time
OEn to Qn
52
19
15
150
30
26
190
38
33
225
45
38
2.0 Fig.8
4.5
6.0
THL/ tTLH output transition time
14
5
4
60
12
10
75
15
13
90
18
15
2.0 Fig.6
4.5
6.0
tW
clock pulse width
HIGH or LOW
80
16
14
14
5
4
100
20
17
120
24
20
2.0 Fig.6
4.5
6.0
tW
master reset pulse
width; HIGH
80
16
14
14
5
4
100
20
17
120
24
20
2.0 Fig.7
4.5
6.0
trem
tsu
tsu
removal time
MR to CP
60
12
10
−8
−3
−2
75
15
13
90
18
15
2.0 Fig.7
4.5
6.0
set-up time
En to CP
100 33
125
25
21
150
30
26
2.0 Fig.9
4.5
6.0
20
17
12
10
set-up time
Dn to CP
60
12
10
17
6
5
75
15
13
90
18
15
2.0 Fig.9
4.5
6.0
6
Philips Semiconductors
Product specification
Quad D-type flip-flop; positive-edge trigger; 3-state
74HC/HCT173
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL
PARAMETER
UNIT
WAVEFORMS
VCC
(V)
+25
−40 to +85 −40 to +125
min. typ. max. min. max. min. max.
th
hold time
En to CP
0
0
0
−17
−6
−5
0
0
0
0
0
0
ns
ns
2.0 Fig.9
4.5
6.0
th
hold time
Dn to CP
1
1
1
−11
−4
−3
1
1
1
1
1
1
2.0 Fig.9
4.5
6.0
fmax
maximum clock pulse
frequency
6.0
30
35
26
80
95
4.8
24
28
4.0
20
24
MHz 2.0 Fig.6
4.5
6.0
7
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