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HD74HC251
1 of 8 Data Selectors/Multiplexers (with 3-state outputs)
REJ03D0599-0200 (Previous ADE-205-476) Rev.2.00 Jan 31, 2006
Description
This multiplexer features both true (Y) and complement (W) outputs as well as a strobe input. The strobe must be at a low logic level to enable this device. When the strobe input is high, both outputs are in the high impedance state. When enabled, address information on the data select inputs determine which data input is routed to the Y and W outputs.
Features
* * * * * * High Speed Operation: tpd (A, B, C to Y) = 20 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 4 A max (Ta = 25C) Ordering Information
Part Name HD74HC251P HD74HC251FPEL HD74HC251RPEL Package Type DILP-16 pin SOP-16 pin (JEITA) SOP-16 pin (JEDEC) Package Code (Previous Code) PRDP0016AE-B (DP-16FV) PRSP0016DH-B (FP-16DAV) Package Abbreviation P FP -- EL (2,000 pcs/reel) EL (2,500 pcs/reel) Taping Abbreviation (Quantity)
PRSP0016DG-A RP (FP-16DNV) Note: Please consult the sales office for the above package availability.
Function Table
Inputs Select C B A X X X L L L L L H L H L L H H H L L H L H H H L H H H Notes: 1. H: high level, L: low level, X: irrelevant 2. Z; high impedance (off-state) 3. D0 through D7; the level of the respective D input. Strobe S H L L L L L L L L Y Z D0 D1 D2 D3 D4 D5 D6 D7 Outputs W Z D0 D1 D2 D3 D4 D5 D6 D7
Rev.2.00 Jan 31, 2006 page 1 of 8
HD74HC251
Pin Arrangement
3 2 Data inputs 1 0 Y Outputs W Strobe GND 6 7 8 W S C A B 11 A 10 B 9 C Data select 3 4 5 D1 D0 Y D5 D6 D7 14 5 Data inputs 13 6 12 7 1 2 D2 D3 D4 16 VCC 15 4
(Top view)
Rev.2.00 Jan 31, 2006 page 2 of 8
HD74HC251
Logic Diagram
A B C
D0
D1
D2 Strobe
D3
VCC
D4
Y
D5 VCC D6 W D7
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 25 50 500 -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.
Rev.2.00 Jan 31, 2006 page 3 of 8
HD74HC251
Recommended Operating Conditions
Item Supply voltage Input / Output voltage Operating temperature Input rise / fall time*1 Symbol VCC VIN, VOUT Ta tr, tf Ratings 2 to 6 0 to VCC -40 to 85 0 to 1000 0 to 500 0 to 400 Unit V V Conditions
C
ns VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V
Notes: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics.
Electrical Characteristics
Item Input voltage Symbol VCC (V) VIH 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 6.0 6.0 6.0 Min 1.5 3.15 4.2 -- -- -- 1.9 4.4 5.9 4.18 5.68 -- -- -- -- -- -- -- -- Ta = 25C Typ Max -- -- -- -- -- -- -- -- -- 2.0 4.5 6.0 -- -- 0.0 0.0 0.0 -- -- -- -- -- 0.5 1.35 1.8 -- -- -- -- -- 0.1 0.1 0.1 0.26 0.26 0.5 0.1 4.0 Ta = -40 to+85C Unit Min Max 1.5 -- V 3.15 -- 4.2 -- -- -- -- 1.9 4.4 5.9 4.13 5.63 -- -- -- -- -- -- -- -- 0.5 1.35 1.8 -- -- -- -- -- 0.1 0.1 0.1 0.33 0.33 5.0 1.0 40 V Test Conditions
VIL
Output voltage
VOH
V
Vin = VIH or VIL IOH = -20 A
VOL
V
Vin = VIH or VIL
IOH = -4 mA IOH = -5.2 mA IOL = 20 A
IOL = 4 mA IOL = 5.2 mA A Vin = VIH or VIL, Vout = VCC or GND A Vin = VCC or GND A Vin = VCC or GND, Iout = 0 A
Off-state output current Input current Quiescent supply current
IOZ Iin ICC
Rev.2.00 Jan 31, 2006 page 4 of 8
HD74HC251
Switching Characteristics
(CL = 50 pF, Input tr = tf = 6 ns)
Item Propagation delay time Symbol VCC (V) tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Output enable time tZH tZL tZH tZL Output disable time tHZ tLZ tHZ tLZ Output rise/fall time Input capacitance tTLH tTHL Cin 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 -- Ta = 25C Min Typ Max -- -- 205 -- 20 41 -- -- 35 -- -- 205 -- 20 41 -- -- 35 -- -- 195 -- 17 39 -- -- 33 -- -- 185 -- 17 37 -- -- 31 -- -- 150 -- 11 30 -- -- 26 -- -- 145 -- -- -- -- -- -- -- -- -- -- -- -- 11 -- -- 12 -- -- 12 -- -- 5 -- 5 29 25 220 44 37 195 39 33 75 15 13 10 Ta = -40 to +85C Unit Test Conditions Min Max -- 255 ns A, B or C to Y -- 51 -- 43 -- 255 ns A, B or C to W -- 51 -- 43 -- 245 ns Data to Y -- 49 -- 42 -- 230 ns Data to W -- 46 -- 39 -- 190 ns strobe to W RL = 1 k -- 38 -- 33 -- 180 ns strobe to Y RL = 1 k -- -- -- -- -- -- -- -- -- -- -- -- 36 31 275 55 47 245 49 42 90 19 16 10
ns
strobe to W
RL = 1 k
ns
strobe to Y
RL = 1 k
ns
pF
Test Circuit
VCC VCC Output S 1 k Y CL = 50 pF 1 k W CL = 50 pF S1 S1 OPEN GND D0 to D7 A B C VCC OPEN GND VCC TEST t PLH / t PHL t ZH/ t HZ t ZL / t LZ Note : 1. CL includes probe and jig capacitance. S1 OPEN GND VCC Output
Pulse Generator Zout = 50
Rev.2.00 Jan 31, 2006 page 5 of 8
See Function Table
Input
HD74HC251
Waveforms
* Waveform - 1
tr 90 % 50 % 10 % t PLH 90 % 50 % 10 % t TLH 90 % 50 % 10 % t PHL 90 % 50 % 10 % t THL VOH VOL tf VCC 0V
Input
Same-phase output
t PHL 90 %
t PLH
Inverse-phase output
90 % 50 % 10 % t THL 50 % 10 % t TLH
VOH VOL
* Waveform - 2
90 % Input G
tf
tr 90 % 50 % 10 % t LZ VCC 0V VOH
50 % 10 % t ZL
Waveform - A t ZH Waveform - B
50 % t HZ
10 %
VOL VOH VOL
50 %
90 %
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 Jan 31, 2006 page 6 of 8
HD74HC251
Package Dimensions
JEITA Package Code P-DIP16-6.3x19.2-2.54 RENESAS Code PRDP0016AE-B Previous Code DP-16FV MASS[Typ.] 1.05g
D
16
9
1 0.89 b3
8
Z
E
A1
A
Reference Symbol
Dimension in Millimeters Min Nom 7.62 19.2 6.3 20.32 7.4 5.06 0.51 0.40 0.48 1.30 0.19 0 2.29 2.54 0.25 0.31 15 2.79 1.12 2.54 0.56 Max
e D E
L
1
A A1
e
bp
e1
b c b c
p 3
e Z ( Ni/Pd/Au plating ) L
JEITA Package Code P-SOP16-5.5x10.06-1.27
RENESAS Code PRSP0016DH-B
Previous Code FP-16DAV
MASS[Typ.] 0.24g
*1
D F 9
16
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
Reference Symbol
*2
c
Dimension in Millimeters Min Nom 10.06 5.50 Max 10.5
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
D E A2
8 bp x M L1
A1 A bp b1 c
0.00
0.10
0.20 2.20
0.34
0.40
0.46
0.15
1
0.20
0.25
A
c
HE
0 7.50 7.80 1.27
8 8.00
A1
y L
e x y
0.12 0.15 0.80 0.50
1
Detail F
Z L L 0.70 1.15
0.90
Rev.2.00 Jan 31, 2006 page 7 of 8
HD74HC251
JEITA Package Code P-SOP16-3.95x9.9-1.27 RENESAS Code PRSP0016DG-A Previous Code FP-16DNV MASS[Typ.] 0.15g
*1
D 9
F
16
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET.
bp
Index mark
*2
E
HE
c
Reference Symbol
Dimension in Millimeters Min Nom 9.90 3.95 Max 10.30
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
D E A2
8 bp x M L1
A1 A bp b1 c c
1
0.10
0.14
0.25 1.75
0.34
0.40
0.46
0.15
0.20
0.25
HE
0 5.80 6.10 1.27
8 6.20
A
A1
L y
e x y
0.25 0.15 0.635 0.40
1
Detail F
Z L L 0.60 1.08
1.27
Rev.2.00 Jan 31, 2006 page 8 of 8
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