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What is 74F646BSC?

This electronic component, produced by the manufacturer "Fairchild", performs the same function as "Octal Transceiver/Register with 3-STATE Outputs".


74F646BSC Datasheet PDF - Fairchild

Part Number 74F646BSC
Description Octal Transceiver/Register with 3-STATE Outputs
Manufacturers Fairchild 
Logo Fairchild Logo 


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March 1988
Revised August 1999
74F646 • 74F646B • 74F648
Octal Transceiver/Register with 3-STATE Outputs
General Description
These devices consist of bus transceiver circuits with 3-
STATE, D-type flip-flops, and control circuitry arranged for
multiplexed transmission of data directly from the input bus
or from the internal registers. Data on the A or B bus will be
clocked into the registers as the appropriate clock pin goes
to a high logic level. Control G and direction pins are pro-
vided to control the transceiver function. In the transceiver
mode, data present at the high impedance port may be
stored in either the A or the B register or in both. The select
controls can multiplex stored and real-time (transparent
mode) data. The direction control determines which bus
will receive data when the enable control G is Active LOW.
In the isolation mode (control G HIGH), A data may be
stored in the B register and/or B data may be stored in the
A register.
Features
s Independent registers for A and B buses
s Multiplexed real-time and stored data
s 74F648 has inverting data paths
s 74F646/74F646B have non-inverting data paths
s 74F646B is a faster version of the 74F646
s 3-STATE outputs
s 300 mil slim DIP
Ordering Code:
Order Number Package Number
Package Description
74F646SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F646MSA
MSA24
24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74F646SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide
74F646BSC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F646BSPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide
74F648SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F648SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
© 1999 Fairchild Semiconductor Corporation DS009580
www.fairchildsemi.com

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74F646BSC equivalent
Absolute Maximum Ratings(Note 2)
Storage Temperature
65°C to +150°C
Ambient Temperature under Bias
55°C to +125°C
Junction Temperature under Bias
55°C to +150°C
VCC Pin Potential to Ground Pin
Input Voltage (Note 3)
0.5V to +7.0V
0.5V to +7.0V
Input Current (Note 3)
30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with VCC = 0V)
Standard Output
3-STATE Output
0.5V to VCC
0.5V to +5.5V
Current Applied to Output
in LOW State (Max)
twice the rated IOL (mA)
ESD Last Passing Voltage (Min)
4000V
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
Note 2: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 3: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Units
VCC
Conditions
VIH
VIL
VCD
VOH
VOL
IIH
IBVI
IBVIT
ICEX
VID
IOD
IIL
IIH + IOZH
IIL + IOZL
IOS
IZZ
ICCH
ICCL
ICCZ
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
10% VCC
Output LOW
Voltage
10% VCC
Input HIGH
Current
Input HIGH Current
Breakdown Test
Input HIGH Current
Breakdown (I/O)
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
2.0
2.0
4.75
100
V Recognized as a HIGH Signal
0.8 V
Recognized as a LOW Signal
1.2 V Min IIN = −18 mA (Non I/O Pins)
V Min IOH = −15 mA (An, Bn)
0.55
V
Min IOL = 64 mA (An, Bn)
5.0 µA Max VIN = 2.7V (Non I/O Pins)
7.0 µA Max VIN = 7.0V (Non I/O Pins)
0.5 mA Max VIN = 5.5V (An, Bn)
50 µA Max VOUT = VCC
V 0.0 IID = 1.9 µA
All Other Pins Grounded
3.75
µA
0.0 VIOD = 150 mV
All Other Pins Grounded
0.6 mA Max VIN = 0.5V (Non I/O Pins)
70 µA Max VOUT = 2.7V (An, Bn)
650 µA Max VOUT = 0.5V (An, Bn)
225 mA Max VOUT = 0V
500 µA 0.0V VOUT = 5.25V
135 mA Max VO = HIGH
150 mA Max VO = LOW
150 mA Max VO = HIGH Z
5 www.fairchildsemi.com


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74F646BSPCThe function is Octal Transceiver/Register with 3-STATE Outputs. FairchildFairchild

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