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DM7136J
V(cc): 4.5 to 5.5V; 6-bit unified bus comparator with open-collector outputs
National .
Semiconductor
DM7136 6-Bit Unified Bus Comparator
with Open-Collector Outputs
General Description
The DM7136 compares two binary words of two-to-six bits
in length and indicates matching (bit-tor-hit) of the two
words. Inputs for one word are 54/74 series-compatible TTL
inputs, whereas those of the second word are high-imped-
ance receivers driven by a terminated data bus. These bus
inputs include 0.65V typical hysteresis which provides 1.4V
noise immunity. The DM7136 has open-collector outputs
which go to the high state upon equality and is expandable
to n bits by coilector-ORing. The device has an output latch
which is strobe controlled.
The transfer of information to the output occurs when the
§TROBE input goes from a logic "I" to a logic "0" state.
Inputs may be changed while the STROBE is at the logic
"I" level, without affecting the state of the output. These
devices are useful as address comparators in computer sys-
tems utilizing unified data bus organization.
Features
a Low bus input current 15 M typ
a High bus input noise immunity 1.4V typ
D Bus inputs comply with IEEE 488-1975
I: TTL-compatibie output
rt Output latch provision
Connection Diagram
DuaMn-Lmtt Package
T4 OUTPUT
12 to 9
l1 2 3
BI T1 B2
(auswmnmwp
4 5 6 ,
TL/F/8S77-t
Order Number DM71360 or DM7136w
See NS Package Number J16A or W16A
Function Table
Condition tm-tOBE Output
DM7118136
T = B, T we B H oN_1*
T = B L H
T ik B L L
latched in previous state.
H '= High Logic Level
L = Low Logic Level
Absolute Maximum Ratings (Note)
If Military/Aerospace ttpetMed devices are required,
please contact the National Semlttondutttor Sales
Omee/Dhtrlttutortt for availability and speclflcatlons.
Supply Voltage 7V
Input Voltage 5.5V
Operating Free Air Temperature Range
DM71 -55''C to + 125''C
Storage Temperature Range - 65°C to + 150°C
Recommended Operating Conditions
Note: The "Absolute Maximum Ratings" are those values
beyond which the safety of the device cannot be guaran-
teed. The device should not be operated at these limits. The
parametric values defined in the "Electrical Characteristics"
table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table erI ttMine
the conditions for actual device operation.
Symbol Parameter DM7136 Units
Mln Nam Max
V00 Supply Voltage 4.5 5 5.5 V
VT+ Positive-Going Input
Threshold Voltage for 1.4 1.75 2 V
Bus Inputs (Note 1)
VT - Negative-Going Input
Threshold Voltage for 0.9 1.1 1.35 V
Bus Inputs (Note 1)
Ihr, High Level Input
Voltage for TTL 2 . V
and Strobe Inputs
" Low Level Input
Voltage for TTL 0.8 V
and Strobe Inputs
VOH High Level Output Voltage 5.5 V
IOL Low Level Output Current 16 mA
TA Free Air Operating Temperature - 55 125 'C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Condltlons Min (N222) Max Units
V. Input Clamp Voltage Vcc = Min. 1. = _ 12 mA -1.5 V
lcEx High Level Output Vcc --- Min,Vo = 5.5V 250 n A
Current " = Max, Vm = Min
VOL Low Level Output Vcc = Min, IOL = Max 0.4 V
Voltage VIH = Min, VI. = Max
II Input Current © Max Vcc = Max TTL 1 mA
InputVoltage V. = 5.5V Strobe 2
'IH High Level Input Vcc = Max TTL 40 H A
Current V. = 2.4V Strobe 80
lit. Low Level Input Vcc = Max TTL -1.6 mA
Current V. = 0.4V Strobe -2.4
lm Bus Input Current V. = 4V VCC TGT Max 15 50 p. A
Vcc = 0V 1 50
'00 Supply Current Vcc = Max (Note 3) 50 74 mA
"oh I.. Vcc = 5V.
Not: 2: All typicals are at Vcc = 5v, TA = 25'C.
Note 3: lcc is measured with all inputs grounded and all outputs open.
Switching Characteristics at Vcc = 5V and TA = 25''C (See Section 1 for Test Waveforms and Output Load)
From (Input) RI. = 400n
Symbol Parameter To (Output) th. ' 15 pF Unlta
Mln Max
tpLH Propagation Delay Time TTL to 30 ns
Low to High Level Output Output
tPHL Propagation Delay Time TTL to 30 ns
High to Low Level Output Output
tpLH Propagation Delay Time Bus to 45 ns
Low to High Level Output Output
tPHL Propagation Detay Time Bus to 45 ns
High to Low Level Output Output
tpLH Propagation Delay Time Strobe to 3 0 ns
Low to High Level Output Output
tpHL Propagation Delay Time Strobe to 30 ns
High to Low Level Output Output
Logic Diagram
9283832:
-rTrt6tre
TL/F/6577 -2
This datasheet has been :
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Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
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