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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
25 Octal Bidirectional Transceiver With 3-State Inputs and Outputs
The MC74F2245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction control (DIR) input. The output enable (OE) input disables the device so the buses are effectively isolated. Both A and B outputs can sink up to 12mA; 25 resistors are included in the lower output circuit to reduce overshoot and undershoot. The MC74F2245 is characterized for operation from 0C to 70C.
MC74F2245
25 OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS AND OUTPUTS FASTTM SCHOTTKY TTL
* 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers * Package Options Include Plastic SOIC (DW-Suffix) and Plastic SSOP
(SD-Suffix) CONNECTION DIAGRAM (TOP VIEW)
VCC 20 OE 19 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11
DW SUFFIX PLASTIC SOIC CASE 751D-04
SD SUFFIX* PLASTIC SSOP CASE 940C-03 1 T/R 2 A0 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 GND
*Thermal Mounting Techniques are Recommended. Please refer to Motorola Application Note AN1567/D.
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current -- High Output Current -- Low Outputs Outputs Parameter Min 4.5 0 Typ 5.0 25 Max 5.5 70 -3.0 12 Unit V C mA mA
2/96
(c) Motorola, Inc. 1996
1
REV 0
MC74F2245
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage, Outputs 2.5 2.4 2.7 VOL VOL IOZH + IIH IOZL + IIL Output LOW Voltage, Outputs Output LOW Voltage, Outputs Output Off Current HIGH Output Off Current LOW OE, T/R Inputs IIH Input HIGH Current OE, T/R Inputs An, Bn Inputs T/R Input IIL IOS Input LOW Current Output Short Circuit Current (Note 2) ICCH ICCL ICCZ Power Supply Current HIGH Power Supply Current LOW Power Supply Current OFF OE Input An Outputs Bn Outputs -60 -100 3.0 3.2 0.2 0.5 0.5 0.75 70 -650 20 100 1.0 -0.8 -1.2 -150 -225 90 120 110 Min 2.0 0.8 -1.2 Typ Max Unit V V V V V V V V A mA A A mA mA mA mA mA mA mA mA VIN = 0.5 V VOUT = GND VOUT = GND VCC = MAX VCC = MAX VCC = MAX Test Conditions Guaranteed Input HIGH Voltage Guaranteed Input LOW Voltage IIN = -18 mA IOH = -1.0 mA IOH = -3.0 mA IOH = -3.0 mA IOL = 1 mA IOL = 12 mA VOUT = 2.7 V VOUT = 0.5 V VIN = 2.7 V VIN = 7.0 V VIN = 5.5 V VCC = MAX VCC = MIN VCC = 4.50 V VCC = 4.50 V VCC = 4.75 V VCC = MIN VCC = MIN VCC = MAX VCC = MAX
VCC = MAX, Outputs HIGH VCC = MAX, Outputs LOW VCC = MAX, Outputs OFF
NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type. 2. Not more than one output should be shorted at a time.
AC CHARACTERISTICS
TA = +25C VCC = +5.0 V CL = 50 pF Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation Delay An to Bn or Bn to An Output Enable Time Output Disable Time Parameter Min 2.5 2.5 3.0 3.5 2.5 2.0 Max 6.0 6.6 7.3 10.6 6.5 6.5 TA = 0C to +70C VCC = 5.0 V 10% CL = 50 pF Min 2.5 2.5 3.0 3.5 2.5 2.0 Max 7.0 7.1 8.5 12.0 7.5 7.5 Unit ns ns ns
MOTOROLA
2
TIMING SOLUTIONS BR1333 -- REV 5
MC74F2245
3.0V An, Bn 1.5V 1.5V 0V tPLH Bn, An 1.5V tPHL VOH 1.5V VOL WAVEFORM 1 - PROPAGATION DELAYS tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
3.0V OE, T/R 1.5V 1.5V 0V tPZH An, Bn 1.5V 0V tPZL 1.5V VOL + 0.3V GND WAVEFORM 2 - OUTPUT ENABLE AND DISABLE TIMES tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns tPLZ 3.5V tPHZ VOH VOH - 0.3V
An, Bn
Figure 1. AC Waveforms
VCC 7V OPEN
PULSE GENERATOR RT
DUT CL
R1 RL
TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ
SWITCH Open 7V Open
CL = 50pF or equivalent (Includes jig and probe capacitance) RL = R1 = 500 or equivalent RT = ZOUT of pulse generator (typically 50)
Figure 2. Test Circuit
TIMING SOLUTIONS BR1333 -- REV 5
3
MOTOROLA
MC74F2245
OUTLINE DIMENSIONS
SD SUFFIX PLASTIC SSOP PACKAGE CASE 940C-03 ISSUE B
20X
K REF 0.12 (0.005)
M
TU
S
V
S
0.25 (0.010) N L/2 L
PIN 1 IDENT 1 10 20 11
M B N F DETAIL E A -V- 0.20 (0.008)
M
-U-
K
TU
S
J
J1
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 5. DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION/INTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF K DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR INTRUSION SHALL NOT REDUCE DIMENSION K BY MORE THAN 0.07 (0.002) AT LEAST MATERIAL CONDITION. 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE -W-. DIM A B C D F G H J J1 K K1 L M MILLIMETERS MIN MAX 7.07 7.33 5.20 5.38 1.73 1.99 0.05 0.21 0.63 0.95 0.65 BSC 0.59 0.75 0.09 0.20 0.09 0.16 0.25 0.38 0.25 0.33 7.65 7.90 0_ 8_ INCHES MIN MAX 0.278 0.288 0.205 0.212 0.068 0.078 0.002 0.008 0.024 0.037 0.026 BSC 0.023 0.030 0.003 0.008 0.003 0.006 0.010 0.015 0.010 0.013 0.301 0.311 0_ 8_
SECTION N-N -W-
0.076 (0.003) -T-
SEATING PLANE
C D G H
DETAIL E
MOTOROLA
4
EEE CCC EEE CCC EEE CCC EEE CCC
K1
TIMING SOLUTIONS BR1333 -- REV 5
MC74F2245
OUTLINE DIMENSIONS
DW SUFFIX PLASTIC SOIC PACKAGE CASE 751D-04 ISSUE E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0_ 7_ 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0_ 7_ 0.395 0.415 0.010 0.029
-A-
20 11
-B-
1 10
10X
P 0.010 (0.25)
M
B
M
20X
D
M
0.010 (0.25)
TA
S
B
J
S
F R X 45 _ C -T-
18X SEATING PLANE
G
K
M
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TIMING SOLUTIONS BR1333 -- REV 5
5
*MC74F2245/D*
MC74F2245/D MOTOROLA

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