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SN74148N View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
SN74148N 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODEERS TI
Texas Instruments TI
SN74148N Datasheet PDF : 24 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
SN54147, SN54148, SN54LS147, SN54LS148
SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148
10ĆLINE TO 4ĆLINE AND 8ĆLINE TO 3ĆLINE PRIORITY ENCODERS
SDLS053B − OCTOBER 1976 − REVISED MAY 2004
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS†
’147
’148
MIN TYP‡ MAX MIN TYP‡ MAX UNIT
VIH
VIL
VIK
VOH
High-level input voltage
Low-level input voltage
Input clamp voltage
High-level output voltage
VOL
II
Low-level output voltage
Input current at maximum input
voltage
VCC = MIN,
VCC = MIN,
VIL = 0.8 V,
VCC = MIN,
VIL = 0.8 V,
VCC = MIN,
2
2
V
0.8
0.8 V
II = −12 mA
−1.5
−1.5 V
VIH = 2 V,
IOH = −800 µA
2.4
3.3
2.4 3.3
V
VIH = 2 V,
IOL = 16 mA
0.2 0.4
0.2 0.4 V
VI = 5.5 V
1
1 mA
High-level input 0 input
IIH
current
Any input except 0 VCC = MAX,
VI = 2.4 V
40
µA
40
80
Low-level input 0 input
IIL
current
Any input except 0 VCC = MAX,
VI = 0.4 V
−1.6
−1.6
mA
−3.2
IOS Short-circuit output current§
VCC = MAX
−35
−85 −35
−85 mA
ICC Supply current
VCC = MAX
(See Note 5)
Condition 1
Condition 2
50 70
42 62
40 60
mA
35 55
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time.
NOTE 5: For ’147, ICC (Condition 1) is measured with input 7 grounded, other inputs and outputs open; ICC (Condition 2) is measured with all
inputs and outputs open. For ’148, ICC (Condition 1) is measured with inputs 7 and EI grounded, other inputs and outputs open; ICC
(Condition 2) is measured with all inputs and outputs open.
SN54147, SN74147 switching characteristics, VCC = 5 V, TA = 255C (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
WAVEFORM
TEST
CONDITIONS
MIN TYP
tPLH
9
Any
Any
In-phase output
tPHL
CL = 15 pF,
7
tPLH
Any
RL = 400
Any
Out-of-phase output
13
tPHL
12
MAX
14
11
19
19
UNIT
ns
ns
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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