STMICROELECTRONICS M74HCT643B1R

M54/74HCT245/640/643
M54/74HCT245/640/643
OCTAL BUS TRANSCEIVER (3-STATE): HCT245 NON INVERTING
HCT640 INVERTING, HCT643 INVERTING/NON INVERTING
.
.
.
.
.
.
.
HIGH SPEED
tPD = 10 ns (TYP.) at VCC = 5V
LOW POWER DISSIPATION
o
ICC = 4 µA (MAX.) at TA = 25 C
COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX.)
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 6 mA (MIN)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS245/640/643
DESCRIPTION
The M54/74HCT245, HCT640 and HCT643 utilise
silicon gate C2MOS technology to achive operating
speeds eqivalent to LSTTL devices.
Along with the low power dissipation and high noise
immunity of standad CMOS integrated circuit, it
possesses the capability to drive 15 LSTTL loads.
These IC’s are intended for two-way asynchronous
communication between data buses, and the
direction of data trasmission is determined by DIR
input. The enable input (G) can be used to disable
the device so that the buses are effectively isolated.
All input are equipped with protection circuits
against static discharge and transient discharge.
These integrated circuits have input and output
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCTXXXF1R
M74HCTXXXM1R
M74HCTXXXB1R
M74HCTXXXC1R
characteristics that are fully compatible with 54/74
LSTTL logic families. M54/74HCT devices are
designed to directly interface HSC2MOS systems
with TTL and NMOS components. They are also
plug in replacements for LSTTL devices giving a
reduction of power consumption.
IT IS PROHIBITED TO APPLY A SIGNAL TO A
BUS TERMINAL WHEN IT IS IN OUTPUT MODE
AND WHEN A BUS THERMINAL IS FLOATING
(HIGH IMPEDANCE STATE), IT IS REQUESTED
TO FIX THE INPUT LEVEL BY MEANS OF
EXTERNAL PULL DOWN OR PULL UP
RESISTOR.
PIN CONNECTION (top view)
HCT245
October 1993
HCT640
HCT643
1/11
M54/M74HCT245/640/643
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
1
2, 3, 4, 5,
6, 7, 8, 9
DIR
A1 to A8
Directional Control
Data Inputs/Outputs
NAME AND FUNCTION
18, 17, 16,
15, 14, 13,
12, 11
B1 to B8
Data Inputs/Outputs
19
G
Output Enabel Input
(Active LOW)
10
GND
Ground (0V)
20
VCC
Positive Supply Voltage
IEC LOGIC SYMBOLS
HCT245
HCT640
HCT643
TRUTH TABLE
INPUT
OUTPUT
DIR
L
A BUS
OUTPUT
B BUS
INPUT
HCT245
A=B
HCT640
A=B
HCT643
A=B
L
H
INPUT
OUTPUT
B=A
B=A
B=A
H
X
Z
Z
Z
Z
Z
X: ”H” or ”L”
Z: High impedance
2/11
FUNCTION
G
L
M54/M74HCT245/640/643
LOGIC DIAGRAM (HCT640)
NOTE: IN CASE OF HCT245 OR HCT643, INPUT INVERTERS MARKED* AT A BUS AND B BUS ARE ELIMINATED RESPECTIVELY
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VCC
Supply Voltage
VI
VO
DC Input Voltage
DC Output Voltage
IIK
IOK
IO
ICC or IGND
Value
Unit
-0.5 to +7
V
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
V
V
DC Input Diode Current
± 20
mA
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
± 20
± 35
mA
mA
DC VCC or Ground Current
PD
Tstg
Power Dissipation
Storage Temperature
TL
Lead Temperature (10 sec)
± 70
mA
500 (*)
-65 to +150
mW
o
C
300
o
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
3/11
M54/M74HCT245/640/643
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
4.5 to 5.5
V
VI
VO
Input Voltage
Output Voltage
0 to VCC
0 to VCC
V
V
Top
Operating Temperature: M54HC Series
M74HC Series
tr, tf
Input Rise and Fall Time (VCC = 4.5 to 5.5V)
o
-55 to +125
-40 to +85
o
0 to 500
C
C
ns
DC SPECIFICATIONS
Test Conditions
Symbol
Parameter
VIH
High Level Input
Voltage
V IL
Low Level Input
Voltage
V OH
High Level
Output Voltage
VOL
II
IOZ
ICC
∆ICC
4/11
Low Level Output
Voltage
Input Leakage
Current
3 State Output
Off State Current
Quiescent Supply
Current
Additional worst
case supply
current
Value
TA = 25 oC
54HC and 74HC
VCC
(V)
Min.
2.0
4.5
to
5.5
4.5
to
5.5
Typ.
Max.
-40 to 85 oC -55 to 125 oC
74HC
54HC
Min.
2.0
0.8
4.5
VI = IO=-20 µA
VIH
or IO=-6.0 mA
V IL
4.5
VI = IO= 20 µA
VIH
or IO= 6.0 mA
V IL
Max.
Min.
2.0
0.8
Max.
V
0.8
4.4
4.5
4.4
4.4
4.18
4.31
4.13
4.10
Unit
V
V
0.0
0.1
0.1
0.1
0.17
0.26
0.33
0.4
VI = VCC or GND
±0.1
±1
±1
µA
5.5
VI = VCC or GND
±0.5
±5.0
±10
µA
5.5
VI = VCC or GND
4
40
80
µA
5.5
Per Input pin
VI = 0.5V or
V I = 2.4V
Other Inputs at
V CC or GND
IO= 0
2.0
2.9
3.0
mA
5.5
V
M54/M74HCT245/640/643
AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns)
Test Conditions
TA = 25 oC
54HC and 74HC
Symbol
Parameter
VCC
(V)
CL
(pF)
tTLH
tTHL
tPLH
tPHL
Output Transition
Time
Propagation
Delay Time
4.5
50
Typ.
7
Max.
12
4.5
50
13
22
tPZL
tPZH
Output Enable
Time
4.5
4.5
150
50
RL = 1KΩ
18
19
30
30
4.5
4.5
150
50
RL = 1KΩ
RL = 1KΩ
24
17
DIR, G
An, Bn
5
13
HCT245
HCT640/643
41
39
tPLZ
tPHZ
CIN
CI/OUT
Output Disable
Time
Input Capacitance
Output
Capacitance
CPD (*)
Power Dissipation
Capacitance
Min.
Value
-40 to 85 oC -55 to 125 oC
74HC
54HC
Min.
Max.
15
Min.
Unit
Max.
18
ns
28
33
ns
38
38
45
45
ns
ns
38
30
48
38
57
45
ns
10
10
10
ns
pF
pF
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC/8 (per circuit)
SWITCHING CHARACTERISTICS TEST WAVEFORM
5/11
M54/M74HCT245/640/643
TEST CIRCUIT ICC (Opr.)
C PD CALCULATION
CPD is to be calculated with the following
formula by using the measured value of ICC
(Opr.) in the test circuit opposite.
I CC (Opr.)
CPD =
f IN x VCC
In determining the value of CPD, a relatively
high frequency of 1 MHz was applied to fIN, in
orther to eliminate any error caused by the
quiescent supply current.
6/11
M54/M74HCT245/640/643
Plastic DIP20 (0.25) MECHANICAL DATA
mm
DIM.
MIN.
a1
0.254
B
1.39
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.010
1.65
0.055
0.065
b
0.45
0.018
b1
0.25
0.010
D
25.4
1.000
E
8.5
0.335
e
2.54
0.100
e3
22.86
0.900
F
7.1
0.280
I
3.93
0.155
L
Z
3.3
0.130
1.34
0.053
P001J
7/11
M54/M74HCT245/640/643
Ceramic DIP20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
inch
MAX.
MIN.
TYP.
MAX.
A
25
0.984
B
7.8
0.307
D
E
3.3
0.5
e3
0.130
1.78
0.020
22.86
0.070
0.900
F
2.29
2.79
0.090
0.110
G
0.4
0.55
0.016
0.022
I
1.27
1.52
0.050
0.060
L
0.22
0.31
0.009
0.012
M
0.51
1.27
0.020
0.050
N1
P
Q
4° (min.), 15° (max.)
7.9
8.13
5.71
0.311
0.320
0.225
P057H
8/11
M54/M74HCT245/640/643
SO20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
2.65
0.10
0.104
0.20
a2
MAX.
0.004
0.007
2.45
0.096
b
0.35
0.49
0.013
0.019
b1
0.23
0.32
0.009
0.012
C
0.50
0.020
c1
45° (typ.)
D
12.60
13.00
0.496
0.512
E
10.00
10.65
0.393
0.419
e
1.27
0.050
e3
11.43
0.450
F
7.40
7.60
0.291
0.299
L
0.50
1.27
0.19
0.050
M
S
0.75
0.029
8° (max.)
P013L
9/11
M54/M74HCT245/640/643
PLCC20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
inch
MAX.
MIN.
TYP.
MAX.
A
9.78
10.03
0.385
0.395
B
8.89
9.04
0.350
0.356
D
4.2
4.57
0.165
0.180
d1
2.54
0.100
d2
0.56
0.022
E
7.37
8.38
0.290
0.330
e
1.27
0.050
e3
5.08
0.200
F
0.38
0.015
G
0.101
0.004
M
1.27
0.050
M1
1.14
0.045
P027A
10/11
M54/M74HCT245/640/643
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
11/11