M74HC243 Datasheet PDF - ST Microelectronics
Part Number | M74HC243 | |
Description | QUAD BUS TRANSCEIVER 3-STATE | |
Manufacturers | ST Microelectronics | |
Logo | ||
There is a preview and M74HC243 download ( pdf file ) link at the bottom of this page. Total 11 Pages |
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M54/74HC243
QUAD BUS TRANSCEIVER (3-STATE)
. HIGH SPEED
tPD = 9 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT 25 °C
. OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. SYMMETRICAL OUTPUT IMPEDANCE
IOL = IOH = 6 mA (MIN.)
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS242/243
DESCRIPTION
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R M74HCXXXM1R
M74HCXXXB1R M74HCXXXC1R
The M54/74HC242/243 are high speed CMOS
QUAD BUS TRANSCEIVER (3-STATE)
FABRICATED IN SILICON GATE C2MOS
technology. They have the same high speed
performance of LSTTL combined with true CMOS
low power consumption. The HC242/243 are 3
STATE bi-directional inverting and non-inverting
buffers and are intended for two-way asynchronous
communication between data buses. They are high
drive current outputs which enable high speed
operation when driving large bus capacitances.
Each device has one active high enable (GBA), and
one active low enable (GAB). GBA enables the A
outputs and GAB enables the B outputs. All inputs
are equipped with protection circuits against static
discharge and transient excess voltage.
PIN CONNECTIONS (top view)
HC242
INPUT AND OUTPUT EQUIVALENT CIRCUIT
HC243
October 1993
NC =
No Internal
Connection
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M54/M74HC242/243
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC CL
(V) (pF)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
Unit
tTLH Output Transition 2.0
tTHL Time
4.5 50
25 60 75 90
7 12 15 18 ns
6.0 6 10 13 15
tPLH Propagation
tPHL Delay Time
2.0
4.5 50
39 90
13 18
115 135
23 27 ns
6.0 11 15 20 23
2.0
4.5 150
51 145 180 220
17 29 36 44 ns
6.0 14 25 31 37
tPZL 3 State Output
2.0
57 145 180 220
tPZH Enable Time
4.5 50 RL = 1 KΩ
18 29
36
44 ns
6.0 15 25 31 37
2.0 70 175 220 265
4.5 150 RL = 1 KΩ
22 35
44
53 ns
6.0 19 30 37 45
tPLZ 3 State Output
2.0
45 150 190 225
tPHZ Disable Time
4.5 50 RL = 1 KΩ
20 30
38
45 ns
6.0 17 26 32 38
CIN
CPD (*)
Input Capacitance
Power Dissipation
Capacitance
for HC242
for HC243
5 10 10 10 pF
30
35
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
SWITCHING CHARACTERISTICS TEST WAVEFORM
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for M74HC243 electronic component. |
Information | Total 11 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ M74HC243.PDF Datasheet ] |
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