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Part: M74HC7640F1R
Category:
Logic
-> Bus Transceivers
Description: Octal Bus Transceiver ( 3-state ) :hc7645 Noninverting Hc7640 Inverting ,hc7643 Inverting/noninverting
Company: ST Microelectronics, Inc.
Datasheet: Download M74HC7640F1R datasheet File size : 53 kB
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Datasheet text preview:
M54HC7245/7640/7643/7645 M74HC7245/7640/7643/7645
OCTAL BUS TRANSCEIVER (3-STATE): HC7645 NON INVERTING HC7640 INVERTING , HC7643 INVERTING/NON INVERTING
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HIGH SPEED tPD = 12 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION o ICC = 4 µA (MAX.) at TA = 25 C HIGH NOISE IMMUNITY VH = 1.1 (TYP.) at VCC = 5V OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 6 mA (MIN) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING RANGE VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 54/74LS245/640/643
B1 R (Plastic Package)
F 1R (Ceramic Package)
M 1R (Micro Package)
C1R (Chip Carrier)
O R DE R CO D E S : M 54HC X XX X F 1 R M 7 4H CX X X XM 1 R M 74HC X XX X B 1R M 74 HCX X X X C1 R
D ESCRI PTI ON The M54/74HC7245 HC7640, HC7643 and HC7645 utilise silicon gate C2MOS technology to achive operating speeds equivalent to LSTTL devices. Along with the low power dissipation and high noise 2 immunity of standads C MOS 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. The HC7245/640/7643/7645 have the same pin PIN CO N NEC TI ON (t op v i ew)
H C7 64 0 H C7 64 3 HC7 645/ HC 72 45
configuration and function as the HC245/640/643 and they have a hysteresis characteristics with each input, so HC7245/7640/7643/7645 can be used as a line receiver, etc. All input are equipped with protection circuits against static discharge and transient excess voltage. 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.
HC7245 is electrically and funcutionally the same as the HC7645
January 1994
1/10
M 54 / M 7 4H C 7 2 4 5/ 76 4 0/ 7 643 / 7 645
INPUT A N D OU T PUT EQ UI VAL ENT C I RC UI T P I N D ES C R I PT I O N
PIN No 1 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 12, 11 19 10 20 SYMBOL DIR A1 to A8 B1 to B8 NAME AND FUNCTION Directional Control Data Inputs/Outputs Data Inputs/Outputs
G GND VCC
Output Enabel Input (Active LOW) Ground (0V) Positive Supply Voltage
I EC L OG IC SYMBO L S
HC 7640 H C764 3 H C764 5
TR U TH T AB LE
INPUT G L L H
X: "H" or "L" Z: High impedance
FUNCTION DIR L H X A BUS OUTPUT INPUT Z B BUS INPUT OUTPUT Z HC7640 A=B B=A Z
OUTPUT HC7643 A=B B=A Z HC7645/7245 A=B B=A Z
2/10
M 5 4 / M 7 4H C 7 2 45/ 764 0 / 7 64 3 / 7 6 45
ABSOLUTE M A XI M U M R A T I N G S
Symbol VCC VI VO IIK IOK IO ICC or IGND PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source Sink Current Per Output Pin DC VCC or Ground Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 ± 20 ± 20 ± 35 ± 70 500 (*) -65 to +150 300 Unit V V V mA mA mA mA mW
o o
C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. (*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
R EC O M M EN D ED O PE R A T I N G C O N D I T I O N S
Symbol VCC VI VO Top Parameter Supply Voltage Input Voltage Output Voltage Operating Temperature: M54HC S eries M74HC Series Value 2 to 6 0 to VCC 0 to VCC -55 to +125 -40 to +85 Unit V V V C o C
o
3/10
Others parts begin by m7
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