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HD74HCT245
Octal Bus Transceivers (with 3-state outputs)
REJ03D0665-0200 (Previous ADE-205-554) Rev.2.00 Mar 30, 2006
Description
This device has an active low enable input G and a direction control input (DIR). When DIR is high, data flows from the A inputs to the B outputs. When DIR is low, data flows from the B inputs to the A outputs. The HD74HCT245 transfers true data from one bus to the other. This device does not have schmitt trigger inputs.
Features
* * * * * * * LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (A to Y) = 12 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 4 A max (Ta = 25C) Ordering Information
Part Name HD74HC245P HD74HC245FPEL HD74HC245RPEL Package Type DILP-20 pin SOP-20 pin (JEITA) SOP-20 pin (JEDEC) Package Code (Previous Code) PRDP0020AC-B (DP-20NEV) PRSP0020DD-B (FP-20DAV) Package Abbreviation P FP -- EL (2,000 pcs/reel) EL (1,000 pcs/reel) ELL (2,000 pcs/reel) Taping Abbreviation (Quantity)
PRSP0020DC-A RP (FP-20DBV) PTSP0020JB-A HD74HC245TELL TSSOP-20 pin T (TTP-20DAV) Note: Please consult the sales office for the above package availability.
Function Table
Enable G L L H high level low level irrelevant Direction Control DIR L H X Operation B data to A bus A data to B bus Isolation
H: L: X:
Rev.2.00 Mar 30, 2006 page 1 of 6
HD74HCT245
Pin Arrangement
DIR 1 A1 A2 A3 A4 A5 A6 A7 A8 2 3 4 5 6 7 8 9 20 VCC 19 Enable G 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 (Top view)
GND 10
Absolute Maximum Ratings
Item Supply voltage range Input / Output voltage Input / Output diode current Output current VCC, GND current Power dissipation Storage temperature Symbol VCC VIN, VOUT IIK, IOK IO ICC or IGND PT Tstg Ratings -0.5 to 7.0 -0.5 to VCC +0.5 20 35 75 500 -65 to +150 Unit V V mA mA mA mW
C
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
Recommended Operating Conditions
Item Supply voltage Input / Output voltage Operating temperature Input rise / fall time*1 Symbol VCC VIN, VOUT Ta tr, tf Ratings 4.5 to 5.5 0 to VCC -40 to 85 0 to 500 Unit V V Conditions
C
ns VCC = 4.5 V
Notes: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics.
Rev.2.00 Mar 30, 2006 page 2 of 6
HD74HCT245
Electrical Characteristics
Item Input voltage Output voltage Symbol VCC (V) VIH VIL VOH VOL Off-state output current Input current Quiescent current IOZ Iin ICC Ta = 25C Min Typ Max 4.5 to 5.5 2.0 -- -- 4.5 to 5.5 -- -- 0.8 4.5 4.4 -- -- 4.5 4.18 -- -- 4.5 -- -- 0.1 4.5 -- -- 0.26 5.5 -- -- 0.5 5.5 5.5 -- -- -- -- 0.1 4.0 Ta = -40 to+85C Min Max 2.0 -- -- 0.8 4.4 -- 4.13 -- -- 0.1 -- 0.33 -- 5.0 -- -- 1.0 40 Unit V V V V A A A Test Conditions
Vin = VIH or VIL IOH = -20 A IOH = -6 mA Vin = VIH or VIL IOL = 20 A IOL = 6 mA Vin = VIH or VIL, Vout = VCC or GND Vin = VCC or GND Vin = VCC or GND, Iout = 0 A
Switching Characteristics
(CL = 50 pF, Input tr = tf = 6 ns)
Item Propagation delay time Output enable time Output disable time Output rise/fall time Input capacitance Symbol VCC (V) tPLH tPHL tZL tZH tLZ tHZ tTLH tTHL Cin 4.5 4.5 4.5 4.5 4.5 4.5 4.5 -- Ta = 25C Min -- -- -- -- -- -- -- -- Typ 11 13 17 14 20 22 4 5 Max 22 22 30 30 30 30 12 10 Ta = -40 to +85C Min -- -- -- -- -- -- -- -- Max 28 28 38 38 38 38 15 10 Unit ns ns ns ns pF Test Conditions
Test Circuit
VCC VCC
G
See Function Table
Input Pulse Generator Zout = 50
Output A1 B1 CL = 50 pF DIR TEST tPLH / tPHL tZH / tHZ tZL / tLZ S2 OPEN GND VCC S1 1 K S2 OPEN GND VCC
Note : 1. CL includes probe and jig capacitance. 2. A2-B2, A3-B3, A4-B4, A5-B5, A6-B6, A7-B7, A8-B8 are identical to above load circuit. 3. S1 is a input / output swich.
Rev.2.00 Mar 30, 2006 page 3 of 6
HD74HCT245
Waveforms
* Waveform - 1
tr 90 % 1.3 V 10 % tPLH 90 % Output Y 1.3 V 10 % tTLH 90 % 1.3 V 10 % tPHL 90 % 1.3 V 10 % tTHL tf VCC 0V
Input A
VOH VOL
* Waveform - 2
90 % Input G
tf
tr 90 % 1.3 V 10 % tLZ VCC 0V VOH
1.3 V 10 % tZL
Waveform - A tZH Waveform - B
1.3 V 10 % tHZ 90 % VOL VOH VOL
1.3 V
Notes : 1. Input waveform : PRR 1 MHz, duty cycle 50%, tr 6 ns, tf 6 ns 2. Waveform- A is for an output with internal conditions such that the output is low except when disabled by the output control. 3. Waveform- B is for an output with internal conditions such that the output is high except when disabled by the output control. 4. The output are measured one at a time with one transition per measurement.
Rev.2.00 Mar 30, 2006 page 4 of 6
HD74HCT245
Package Dimensions
JEITA Package Code P-DIP20-6.3x24.5-2.54 RENESAS Code PRDP0020AC-B Previous Code DP-20NEV MASS[Typ.] 1.26g
D
20
11
1 0.89 b3
10
Z
A1
A
E
Reference Symbol
Dimension in Millimeters
Min
e
bp
e1
c
( Ni/Pd/Au plating )
e1 D E A A1 bp b3 c e Z L
Nom Max 7.62 24.50 25.40 6.30 7.00 5.08
L
0.51 0.40 0.48 0.56 1.30 0.19 0.25 0.31 0 15 2.29 2.54 2.79 1.27 2.54
JEITA Package Code P-SOP20-7.5x12.8-1.27
RENESAS Code PRSP0020DC-A
Previous Code FP-20DBV
MASS[Typ.] 0.52g
*1
D
F 11
20
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" @ DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT @ INCLUDE TRIM OFFSET.
bp
HE E
*2
Index mark
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
c
Reference Dimension in Millimeters Symbol
10 bp x M L1
A1
y
L
Detail F
D E A2 A1 A bp b1 c c1 HE e x y Z L L1
Min Nom Max 12.80 13.2 7.50
0.10 0.20 0.30 2.65 0.34 0.40 0.46 0.20 0.25 0.30 0 8 10.00 10.40 10.65 1.27 0.12 0.15 0.935 0.40 0.70 1.27 1.45
Rev.2.00 Mar 30, 2006 page 5 of 6
A
HD74HCT245
JEITA Package Code P-SOP20-5.5x12.6-1.27 RENESAS Code PRSP0020DD-B Previous Code FP-20DAV MASS[Typ.] 0.31g
*1
D 11
F
20
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET.
bp
HE
E
Index mark
*2
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
10 bp x M L1
c
Reference Dimension in Millimeters Symbol
y
A1
L
Detail F
D E A2 A1 A bp b1 c c1 HE e x y Z L L1
Min Nom Max 12.60 13.0 5.50
0.00 0.10 0.20 2.20 0.34 0.40 0.46 0.15 0.20 0.25 0 8 7.50 7.80 8.00 1.27 0.12 0.15 0.80 0.50 0.70 0.90 1.15
JEITA Package Code P-TSSOP20-4.4x6.5-0.65
RENESAS Code PTSP0020JB-A
Previous Code TTP-20DAV
MASS[Typ.] 0.07g
*1
D F 11
A
20
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET.
bp
HE
*2
E
Index mark
Terminal cross section ( Ni/Pd/Au plating )
Reference Dimension in Millimeters Symbol
c
1 Z e
*3
10 bp L1 x M
A1
L
y
Detail F
D E A2 A1 A bp b1 c c1 HE e x y Z L L1
Min Nom Max 6.50 6.80 4.40
0.03 0.07 0.10 1.10 0.15 0.20 0.25 0.10 0.15 0.20 0 8 6.20 6.40 6.60 0.65 0.13 0.10 0.65 0.4 0.5 0.6 1.0
Rev.2.00 Mar 30, 2006 page 6 of 6
A
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