DM74ALS251M

DM74ALS251M Datasheet


DM74ALS251 3-STATE 1-of-8 Line Data Selector/Multiplexer

Part Datasheet
DM74ALS251M DM74ALS251M DM74ALS251M (pdf)
Related Parts Information
DM74ALS251N DM74ALS251N DM74ALS251N
DM74ALS251MX DM74ALS251MX DM74ALS251MX
DM74ALS251SJ DM74ALS251SJ DM74ALS251SJ
DM74ALS251SJX DM74ALS251SJX DM74ALS251SJX
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DM74ALS251 3-STATE 1-of-8 Line Data Selector/Multiplexer

DM74ALS251 3-STATE 1-of-8 Line Data Selector/Multiplexer

This Data Selector/Multiplexer contains full on-chip decoding to select one-of-eight data sources as a result of a unique three-bit binary code at the Select inputs. Two complementary outputs provide both inverting and non-inverting buffer operation. An Output Control input is provided which, when at the high level, places both outputs in the high impedance OFF-State. In order to prevent bus access conflicts, output disable times are shorter than output enable times. The Select input buffers incorporate internal overlap features to ensure that select input changes do not cause invalid output transients.
s Advanced oxide-isolated, ion-implanted Schottky TTL process
s Switching performance is guaranteed over full temperature and VCC supply range
s Pin and functional compatible with LS family counterpart s Improved output transient handling capability s Output control circuitry incorporates power-up 3-STATE
Ordering Code:

Order Number Package Number

Package Description

DM74ALS251M

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow

DM74ALS251SJ

M16D
16-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide

DM74ALS251N

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Function Table

Inputs

Select

Strobe

H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance OFF D0 thru D7 = The Level of the Respective D Input

Outputs
2000 Fairchild Semiconductor Corporation DS006214

DM74ALS251

Logic Diagram

DM74ALS251

Absolute Maximum Ratings Note 1

Supply Voltage, VCC Input Voltage Applied to Disabled Output Operating Free Air Temperature Range Storage Temperature Range Typical

N Package M Package
7V 5.5V 0°C to +70°C −65°C to +150°C
78.0°C/W 107.0°C/W

Note 1 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Recommended Operating Conditions

VCC VIH VIL IOH IOL TA

Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature

Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.

Parameter

Conditions

Input Clamp Voltage

HIGH Level

Output Voltage

LOW Level

Output Voltage

VCC = 4.5V, IIN = −18 mA VCC = 4.5V, IOH = Max IOH = −400 µA, VCC = 4.5V to 5.5V

VCC = 4.5V

IOL = 24 mA

VCC−2

Input Current at Maximum Input Voltage

VCC = 5.5V, VIH = 7V

HIGH Level Input Current

VCC = 5.5V, VIH = 2.7V

LOW Level Input Current

VCC = 5.5V, VIN = 0.4V

Output Drive Current
More datasheets: ACPM-9407-TR1 | 26700-209-PLR | SB220E-G | SB2100E-G | SB240E-G | SB280E-G | SB260E-G | SW2PF-50 | DM74ALS251N | DM74ALS251MX


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Datasheet ID: DM74ALS251M 513670