DataSheet39.com

What is M74HC123?

This electronic component, produced by the manufacturer "ST Microelectronics", performs the same function as "DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR".


M74HC123 Datasheet PDF - ST Microelectronics

Part Number M74HC123
Description DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
Manufacturers ST Microelectronics 
Logo ST Microelectronics Logo 


There is a preview and M74HC123 download ( pdf file ) link at the bottom of this page.





Total 14 Pages



Preview 1 page

No Preview Available ! M74HC123 datasheet, circuit

M54HC123/123A
M74HC123/123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
. HIGH SPEED
tPD = 25 ns (TYP) at VCC = 5V
. LOW POWER DISSIPATION
STANDBY STATE ICC=4 µA (MAX.) AT TA=25°C
ACTIVE STATE ICC = 200 µA (TYP.) AT VCC=5V
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. WIDE OUTPUT PULSE WIDTH RANGE
tWOUT = 120 ns 60 s OVER AT VCC = 4.5 V
. PIN AND FUNCTION COMPATIBLE WITH
54/74LS123
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R M74HCXXXM1R
M74HCXXXB1R M74HCXXXC1R
DESCRIPTION
The M54/74HC123 is a high speed CMOS MONO-
STABLE multivibrator fabricated with silicon gate
C2MOS technology. It achieves the high speed
operation similar to equivalent LSTTL while main-
taining the CMOS low power dissipation. There are
two trigger inputs, A INPUT (negative edge) and 8
INPUT (positive edge). These inputs are valid for
slow rising/falling signals, (tr = tf = I sec). The device
may also be triggered by using the CLR input (posi-
tive-edge) because of the Schmitt-trigger input ;
after triggering the output maintains the MONO-
STABLE state for the time period determined by the
external resistor Rx and capacitor Cx. When Cx
10nF and Rx 10K, the output pulse width value
is approssimatively given by the formula: tw(out) = K
Cx Rx.
Two different pulse width constant are available:
K 0.45 for HC123 K 1 for HC123A.
Taking CLR low breaks this MONOSTABLE
STATE. If the next trigger pulse occurs during the
MONOSTABLEperiod it makes the MONOSTABLE
period longer. Limit for values of Cx and Rx :
Cx : NO LIMIT
Rx : VCC < 3.0 V 5 K to 1 M
VCC 3.0 V 1 K to 1 M
All inputs are equipped with protection circuits
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
October 1993
1/14

line_dark_gray
M74HC123 equivalent
M54/M74HC123/123A
PIN DESCRIPTION
PIN No
1, 9
2, 10
3, 11
4, 12
7
13, 5
14, 6
15
8
16
SYMBOL
1A, 2A
1B, 2B
1CLR,
2CLR
1Q, 2Q
2REXT/CEXT
1Q, 2Q
1CEXT
2CEXT
1REXT/CEXT
GND
VCC
NAME AND FUNCTION
Trigger Inputs (Negative
Edge Triggered)
Trigger Inputs (Positive
Edge Triggered)
Direct Reset LOW and
Trigger Action at Positive
Edge
Outputs (Active LOW)
External Resistor
Capacitor Connection
Outputs (Active HIGH)
External Capacitor
Connection
External Resistor
Capacitor Connection
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7
V
VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
± 20 mA
IOK DC Output Diode Current
± 20 mA
IO DC Output Source Sink Current Per Output Pin
ICC or IGND DC VCC or Ground Current
± 25 mA
± 50 mA
PD Power Dissipation
Tstg Storage Temperature
500 (*)
-65 to +150
mW
oC
TL Lead Temperature (10 sec)
300 oC
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
5/14


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for M74HC123 electronic component.


Information Total 14 Pages
Link URL [ Copy URL to Clipboard ]
Download [ M74HC123.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
M74HC123The function is DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR. ST MicroelectronicsST Microelectronics
M74HC125The function is QUAD BUS BUFFERS 3-STATE. ST MicroelectronicsST Microelectronics
M74HC125The function is 3-STATE Quad Buffers. Fairchild SemiconductorFairchild Semiconductor

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

M74H     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search