Fairchild DM74ALS1000A service manual
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DM74ALS1000A
Quadruple 2-Input NAND Buffer
DM74ALS1000A Quadruple 2-Input NAND Buffer
September 1986
Revised February 2000
General Description
These devices contain four independent 2-input buffer/drivers, each of which per forms the logic NA ND function. T he
DM74ALS1000A is a buffer/driver version of the
DM74ALS00A.
Features
■ Switching specifications at 50 pF
■ Switching specifications guaranteed over full tempera-
ture and V
■ Advanced oxide-isolated, ion-implanted Schottky TTL
process
■ Improved line receiving characteristics
CC
range
Ordering Code:
Order Number Package Number Package Description
DM74ALS1000AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74ALS1000AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering cod e.
Connection Diagram Function Table
Y = AB
Inputs Output
ABY
LLH
LHH
HLH
HHL
H = HIGH Logic Level
L = LOW Logic Level
© 2000 Fairchild Semiconductor Corporation DS006249 www.fairchildsemi.com
Absolute Maximum Ratings(Note 1)
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θ
DM74ALS1000A
JA
N Package 83.0°C/W
M Package 114.0°C/W
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the dev ice cannot be guaranteed. T he device sh ould not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommend ed O peratin g Cond itions” t able w ill defin e the c ondit ions
for actual device operation.
Recommended Operating Conditions
Symbol Parameter Min Nom Max Units
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage 4.5 5 5.5 V
HIGH Level Input Voltage 2 V
LOW Level Input Voltage 0.8 V
HIGH Level Output Current −2.6 mA
LOW Level Output Current 24 mA
Free Air Operating Temperature 0 70 °C
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Symbol Parameter Conditions Min Typ Max Units
V
V
V
I
I
I
I
I
I
IK
OH
OL
I
IH
IL
O
CCH
CCL
Input Clamp Voltage VCC = 4.5V, II = −18 mA −1.5 V
HIGH Level VCC = 4.5V
Output Voltage VIL = VIL Max
VCC = 4.5V to 5.5V IOH = −400 µAVCC − 2V
LOW Level VCC = 4.5V IOL = 12 mA 0.25 0.4 V
Output Voltage VIH = 2V IOL = 24 mA 0.35 0.5 V
Input Current at Maximum Input Voltage VCC = 5.5V, VIH = 7V 0.1 mA
HIGH Level Input Current VCC = 5.5V, VIH = 2.7V 20 µA
LOW Level Input Current VCC = 5.5V, VIL = 0.4V −0.1 mA
Output Drive Current VCC = 5.5V, VO = 2.25V −30 −112 mA
Supply Current with Outputs HIGH VCC = 5.5V, VI = 0V 0.86 1.6 mA
Supply Current with Outputs LOW VCC = 5.5V, VI = 4.5V 4.8 7.8 mA
IOH = Max 2.4 3.2 V
Switching Characteristics
over recommended operating free air temperature range
Symbol Parameter Conditions Min Max Units
t
PLH
t
PHL
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Propagation Delay Time VCC = 4.5V to 5.5V
LOW-to-HIGH Level Output RL = 500Ω
Propagation Delay Time CL = 50 pF
HIGH-to-LOW Level Output
28ns
27ns
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