MC74F657A MC74F657B Octal Bidirectional Transceivers with 8-bit parity
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MC74F657A,B OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS)
MC74F657A MC74F657B Octal Bidirectional Transceivers with 8-bit parity Generator/Checker 3-state outputs. options faster versions F657 contain eight noninverting buffers with 3-state outputs 8-bit parity generator/checker. These devices intended bus-oriented applications. buffers have guaranteed current sinking capability ports ports. Transmit/Receiver (T/R) input determines direction data flow through bidirectional transceivers. Transmit (active HIGH) enables data from ports ports; Receive (active LOW) enables data from ports ports. High-Impedance Base Input Reduced Loading HIGH States) Ideal Applications Where High Output Drive Light Loading Required (IIL versus Fast Combines F245 F280A Functions Package 3-State Outputs Outputs, PARITY, ERROR, Sink Source Source Current Input Diodes Termination Effects Glitchless Outputs During Power Power Down High Impedance Outputs During Power Protection 4000 Volts ASSIGNMENT
PARITY
OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS)
FASTSCHOTTKY
SUFFIX CERAMIC CASE 758-01
SUFFIX PLASTIC CASE 724-03
SUFFIX SOIC CASE 751E-03
ORDERING INFORMATION
MC74FXXXAJ/BJ MC74FXXXAN/BN MC74FXXXADW/BDW
ODD/ ERROR EVEN
Ceramic Plastic SOIC
LOGIC SYMBOL
PARITY EVEN/ODD ERROR
FAST DATA 4-403
MC74F657A,
GUARANTEED OPERATING RANGES
Symbol Supply Voltage Operating Ambient Temperature Range Output Current High Output Current Parameter -3.0/-15 24/64 Unit
FUNCTION TABLE
Number Inputs That High Inputs Even/Odd Input/Output Parity Error Outputs Outputs Mode Transmit Transmit Receive Receive Receive Receive
Number Inputs That High
Inputs Even/Odd
Input/Output Parity Error
Outputs Outputs Mode Transmit Transmit Receive Receive Receive Receive
Don't Care
HIGH Voltage Level; Voltage Level; Don't Care; HIGH impedance state.
FAST DATA 4-404
MC74F657A,
CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol Input HIGH Voltage Input Voltage Input Clamp Diode Voltage Outputs Output HIGH Voltage B0-B7 PARITY, ERROR A0-A7 Output Voltage B0-B7 PARITY, ERROR 0.35 0.55 Input HIGH Current B0-B7, PARITY EVEN/ODD T/R, EVEN/ODD +IOZH +IOZL IOZH IOZL Input Current T/R, Off-State Current HIGH Level Voltage Applied Off-State Current Level Voltage Applied Off-State Output Current, High-Level Voltage Applied Off-State Output Current, Low-Level Voltage Applied Output Short Circuit Current (Note ERROR Outputs PARITY, Outputs, ERROR ICCH Total Supply Current ICCL ICCZ -100 -150 -225 MAX, VOUT A0-A7 B0-B7 PARITY MAX, VOUT MAX, VOUT MAX, VOUT -3.0 -0.73 Parameter -1.2 Unit Test Conditions Guaranteed Input HIGH Voltage Guaranteed Input Voltage MIN, 4.75
T/R, EVEN/ODD A0-A7
MAX,
MAX, MAX, VOUT
NOTES: conditions shown MAX, appropriate value specified under recommended operating conditions applicable device type. more than output should shorted time, more than second.
FAST DATA 4-405
MC74F657A,
F657A ELECTRICAL CHARACTERISTICS
+25°C +5.0 Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay Propagation Delay PARITY Propagation Delay EVEN/ODD PARITY, ERROR Propagation Delay ERROR Propagation Delay PARITY ERROR Output Enable Time HIGH Level Output Disable Time from HIGH Level 10.5 10.5 +70°C +5.0 11.5 Unit
F657B ELECTRICAL CHARACTERISTICS
+25°C +5.0 Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay Propagation Delay PARITY Propagation Delay EVEN/ODD PARITY, ERROR Propagation Delay ERROR Propagation Delay PARITY ERROR Output Enable Time HIGH Level Output Disable Time from HIGH Level 11.5 11.5 +70°C +5.0 Unit
FAST DATA 4-406
MC74F657A,
LOGIC DIAGRAM
EVEN/ODD
PARITY
ERROR
FAST DATA 4-407
-A24
Case 751E-03 Suffix 24-Pin Plastic SO-24 (WIDE)
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSION INCLUDE MOLD PROTRUSION. MAXIMUM MOLD PROTRUSION 0.15 (0.006) SIDE. 751E OBSOLETE, STANDARD 751E
0.25 (0.010)
0.25 (0.010)
SEATING PLANE
MILLIMETERS
15.25 7.40 2.35 0.35 0.41 15.54 7.60 2.65 0.49 0.90
INCHES
0.601 0.292 0.093 0.014 0.016 0.612 0.299 0.104 0.019 0.035
1.27 0.229 0.127 0.317 0.292
0.050 0.0090 0.0050 0.0125 0.0115
10.05 0.25
10.55 0.75
0.395 0.010
0.415 0.029
Case 758-01 Suffix 24-Pin Ceramic Dual In-Line
NOTES: DIMENSION CENTER LEADS WHEN
FORMED PARALLEL. DIMENSIONING TOLERANCING ANSI Y14.5, 1973.
-TSEATING PLANE
0.25 (0.010)
MILLIMETERS
31.50 7.24 3.68 0.38 1.14 32.64 7.75 4.44 0.53 1.57
INCHES
1.240 0.285 0.145 0.015 0.045 1.285 0.305 0.175 0.021 0.062
2.54 0.20 2.54 7.62 0.51 9.14 0.33 4.19 7.87 1.27 10.16
0.100 0.008 0.100 0.300 0.020 0.360 0.013 0.165 0.310 0.050 0.400
INSIDE LEADS
Case 724-03 Suffix 24-Pin Plastic
NOTES:
-A24
CHAMFERRED CONTOUR OPTIONAL. CENTER LEADS WHEN FORMED PARALLEL.
DIMENSIONS TOLERANCES ANSI Y14.5M, 1982.
-B12
CONTROLLING DIMENSION: INCH.
-TSEATING PLANE
0.25 (0.010)
NOTE
0.25 (0.010)
MILLIMETERS
31.25 6.35 3.69 0.38 32.13 6.85 4.44 0.51
INCHES
1.230 0.250 0.145 0.015 1.265 0.270 0.175 0.020
1.27 1.02 1.52
0.050 0.040 0.060
2.54 0.18 2.80 0.30 3.55
0.100 0.007 0.110 0.012 0.140
7.62
0.300
0.51
1.01
0.020
0.040
FAST DATA 4-408
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FAST DATA 4-409
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