935020910112 [NXP]
IC HC/UH SERIES, OCTAL 1-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20, SOT-146-1, DIP-20, Bus Driver/Transceiver;
| 型号： | 935020910112 |
| 厂家： | 
NXP |
| 描述： | IC HC/UH SERIES, OCTAL 1-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20, SOT-146-1, DIP-20, Bus Driver/Transceiver 光电二极管 输出元件 逻辑集成电路 |
| 文件： | 总7页 (文件大小：42K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT7245
Octal bus Schmitt-trigger
transceiver; 3-state
December 1990
Product specification
File under Integrated Circuits, IC06
Philips Semiconductors
Product specification
Octal bus Schmitt-trigger transceiver;
3-state
74HC/HCT7245
compliance with JEDEC standard
no. 7A.
The “7245” is identical to the “245” but
has hysteresis on the data inputs.
FEATURES
• Octal bidirectional bus interface
• Non-inverting 3-state outputs
• Output capability: bus driver
• ICC category: MSI
The 74HC/HCT7245 are octal
transceivers featuring non-inverting
3-state bus compatible outputs in
both send and receive directions. The
“7245” features an output enable
(OE) input for easy cascading and a
send/receive input (DIR) for direction
control. OE controls the outputs so
that the buses are effectively isolated.
The 74HC/HCT7245 have
Schmitt-trigger inputs. These inputs
are capable of transforming slowly
changing input signals into sharply
defined jitter-free output signals.
FUNCTION TABLE
INPUTS
INPUTS/OUTPUTS
• Schmitt-trigger action on all data
inputs
OE DIR
An
Bn
L
L
H
L
H
X
A = B
inputs
Z
inputs
B = A
Z
GENERAL DESCRIPTION
Notes
The 74HC/HCT7245 are high-speed
Si-gate CMOS devices and are pin
compatible with low power Schottky
TTL (LSTTL). They are specified in
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
TYPICAL
UNIT
SYMBOL
PARAMETER
CONDITIONS
HC
HCT
tPHL/ tPLH
CI
propagation delay An to Bn
input capacitance
CL = 15 pF; VCC = 5 V
8
12
ns
pF
pF
pF
3.5
10
40
3.5
10
CI/O
input/output capacitance
CPD
power dissipation capacitance per transceiver
notes 1 and 2
40
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
∑ (CL × VCC2 × 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”.
December 1990
2
Philips Semiconductors
Product specification
Octal bus Schmitt-trigger transceiver;
3-state
74HC/HCT7245
PIN DESCRIPTION
PIN NO.
SYMBOL
DIR
NAME AND FUNCTION
direction control
1
2, 3, 4, 5, 6, 7, 8, 9
A0 to A7
GND
data inputs/outputs
ground (0 V)
10
18, 17, 16, 15, 14, 13, 12, 11
B0 to B7
OE
data inputs/outputs
19
20
output enable input (active LOW)
positive supply voltage
VCC
ge
OE
lfpage
age
19
19
1
2
3
4
5
6
7
8
9
V
G3
DIR
20
19
18
17
16
15
14
13
12
11
CC
OE
3EN1
A
0
1
3EN2
DIR
1
2
A
1
B
B
B
B
B
B
B
B
0
1
2
3
4
5
6
7
A
B
B
A
2
1
0
7
0
18
11
2
18
A
3
2
7245
3
4
5
6
7
8
9
17
16
15
14
13
12
11
A
4
A
5
A
A
6
7
9
A
7
GND 10
MBA404
MBA330
MBA327
Fig.1 Pin configuration.
Fig.2 Functional diagram.
Fig.3 IEC logic symbol.
December 1990
3
Philips Semiconductors
Product specification
Octal bus Schmitt-trigger transceiver;
3-state
74HC/HCT7245
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
TRANSFER CHARACTERISTICS FOR 74HC
Voltages are referred to GND (ground = 0 V)
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL PARAMETER
UNIT
VCC
(V)
+25
−40 to +85 −40 to +125
WAVEFORMS
min. typ. max. min. max. min. max.
VT+
VT−
VH
positive-going threshold
1.50
3.15
4.20
1.50
3.15
4.20
1.50
3.15
4.20
V
V
V
2.0 Figs. 4 and 5
4.5
6.0
negative-going threshold 0.30
0.30
1.35
1.80
0.30
1.35
1.80
2.0 Figs. 4 and 5
4.5
6.0
1.35
1.80
hysteresis (VT+ − VT−)
0.1
0.25 0.4
0.3 0.5
0.2
0.1
0.25
0.3
0.1
0.25
0.3
2.0 Figs. 4 and 5
4.5
6.0
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL PARAMETER
UNIT
VCC
+25
−40 to +85 −40 to +125
WAVEFORMS
(V)
min. typ. max. min. max. min. max.
t
t
PHL/ tPLH propagation delay
An to Bn;
33
12
10
100
20
17
125
25
21
150
30
26
ns
ns
ns
ns
2.0 Fig.7
4.5
6.0
Bn to An
PZH/ tPZL 3-state output enable time
47
17
14
160
32
27
200
40
34
240
48
41
2.0 Fig.7
4.5
6.0
OE to An;
OE to Bn
tPHZ/ tPLZ 3-state output disable time
52
19
16
160
32
27
200
40
34
240
48
41
2.0 Fig.7
4.5
6.0
OE to An;
OE to Bn
t
THL/ tTLH output transition time
14
5
4
60
12
10
75
15
13
90
18
15
2.0 Fig.7
4.5
6.0
December 1990
4
Philips Semiconductors
Product specification
Octal bus Schmitt-trigger transceiver;
3-state
74HC/HCT7245
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
An
Bn
OE
DIR
0.33
0.33
1.50
1.00
TRANSFER CHARACTERISTICS FOR 74HCT
Voltages are referred to GND (ground = 0 V)
T
amb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
UNIT
VCC
(V)
+25
−40 to +85 −40 to +125
WAVEFORMS
min. typ. max. min. max. min. max.
VT+
VT−
VH
positive-going threshold
2.0
2.1
2.0
2.1
2.0
2.1
V
V
V
4.5 Figs. 4 and 5
5.5
negative-going threshold 0.7
0.8
0.64
0.74
0.6
0.7
4.5 Figs. 4 and 5
5.5
hysteresis (VT+ − VT−)
0.17 0.23
0.17 0.23
4.5 Figs. 4 and 5
5.5
December 1990
5
Philips Semiconductors
Product specification
Octal bus Schmitt-trigger transceiver;
3-state
74HC/HCT7245
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
UNIT
VCC
(V)
+25
−40 to +85 −40 to +125
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
17
19
19
30
32
32
37
40
40
45
48
48
ns
ns
ns
4.5 Fig.7
4.5 Fig.7
4.5 Fig.7
An to Bn;
Bn to An
tPZH/ tPZL 3-state output enable time
OE to An;
OE to Bn
t
PHZ/ tPLZ 3-state output disable
time
OE to An;
OE to Bn
tTHL/ tTLH output transition time
5
12
15
18
ns
4.5 Fig.7
TRANSFER CHARACTERISTIC WAVEFORMS
MBA325
handbook, halfpage
V
handbook, halfpage
O
V
T
V
H
V
V
I
V
T
O
V
V
I
H
V
V
T
T
MBA324
Fig.5 Waveforms showing the definition of
Fig.4 Transfer characteristic.
VT+, VT − and VH.
December 1990
6
Philips Semiconductors
Product specification
Octal bus Schmitt-trigger transceiver;
3-state
74HC/HCT7245
AC WAVEFORMS
(1) HC : VM = 50%; VI = GND to VCC
.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.6 Waveforms showing the input (An, Bn) to output (Bn, An) propagation delays and the output transition times.
t
t
f
r
90 %
(1)
M
OE INPUT
n
V
10 %
t
t
PLZ
PZL
OUTPUT
LOW - to - OFF
OFF - to - LOW
(1)
V
M
10 %
t
t
PZH
PHZ
90 %
OUTPUT
(1)
HIGH - to - OFF
OFF - to - HIGH
V
M
outputs
enabled
outputs
enabled
outputs
disabled
MBA322
(1) HC : VM = 50%; VI = GND to VCC
.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.7 Waveforms showing the 3-state enable and disable times.
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
December 1990
7
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