DM74LS170N ,4x4 REGISTER FILE WITH OPEN-COLLECTOR OUTPUTSFeatures
I Simultaneous read/write operation
I Expandable to 512 words of n-bits
I Typical ..
DM74LS170N ,4x4 REGISTER FILE WITH OPEN-COLLECTOR OUTPUTSElectrical Characteristics"
table are not guaranteed at the absolute maximum ratings.
The 'meromm ..
DM74LS173AN ,7 V, TRI-STATE 4-bit D-type registerLS173
National
Semiconductor
54LS173/DM74LS173A
DM74LS174M ,Hex/Quad D-Type Flip-Flops with ClearFeaturesThese positive-edge-triggered flip-flops utilize TTL circuitry ■ DM74LS174 contains six fli ..
DM74LS174MX , Hex D Flip-Flop with ClearApplications include:ular voltage level and is not directly related to the transitionBuffer/storage ..
DM74LS174N ,Hex/Quad D-Type Flip-Flops with ClearFeaturesYLS174 contains six flip-flops with single-rail outputsThese positive-edge-triggered flip-f ..
DS2176 ,T1 Receive BufferPIN DESCRIPTION Table 1PIN SYMBOL TYPE DESCRIPTION1 I Signaling Inhibit. When low, ABCD signaling u ..
DS2176N ,T1 Receive BufferFEATURES PIN ASSIGNMENT§ Synchronizes loop–timed and system–timedT1 data streamsSIGH 1 24 VDDRMSYN2 ..
DS2176Q ,T1 Receive BufferPIN DESCRIPTION Table 1PIN SYMBOL TYPE DESCRIPTION1 I Signaling Inhibit. When low, ABCD signaling u ..
DS2176Q+ ,T1 Receive BufferFEATURES PIN ASSIGNMENT§ Synchronizes loop–timed and system–timedT1 data streamsSIGH 1 24 VDDRMSYN2 ..
DS2176QN ,T1 Receive Bufferapplications with one “skinny” 24–lead package.Application areas include digital trunks, drop and i ..
DS2180A ,T1 TransceiverFEATURES PIN ASSIGNMENT Single chip DS1 rate transceiver TMSYNC 1 40 VDD Supports common fra ..
DM74LS170N
4x4 REGISTER FILE WITH OPEN-COLLECTOR OUTPUTS
National
Semiconductor
54LS170/DM74LS170
4 It 4 Register File with Open-Collector Outputs
General Description
The 'LS170 contains 16 high speed, low power, transparent
D-type latches arranged as four words of four bits each, to
function as a 4 X 4 register file. Separate read and write
inputs, both address and enable, allow simultaneous read
and write operation. Open-collector outputs make it possible
to connect up to 128 outputs in a wired-AND configuration
to increase the word capacity up to 512 words. Any number
of these devices can be operated In parallel to generate an
n-bit length. The '670 provides a similar function to this de-
vice but it features TRl-STATEO outputs.
Features
I: Simultaneous read/write operation
I: Expandable to 512 words of n-bits
" Typical access time of 20 ns
a Low leakage open-collector outputs for expansion
Connection Diagram Logic Symbol
12 15 1 2 3
DuaI-ln-Llno Package I I I
N, 1 WE 01 D2 03 "
02- 1 16 -a 14--_ WI?
03- 2 15 -01 13-- WAI
tu-- 3 14 -WAO _ ttht)
BM- 4 13 -WA1 - MI RE Ot 02 03 04
RAO-I 5 12 -WE ? I I I I
04-6 It-ite 1110 , 7 5
03- 7 10 -01 TL/F/9820-2
(mo- 8 9 -02 Vcc = Pin 16
GND = Pin a
TLfF/9820-1
Order Number 54LS170DMttB, 54LS170FMQB,
DM74LS170WM or DM74L3170N
See NS Package Number J16A, Mum, N16E or W16A
Pln Names Description
DI-IM Data Inputs
WM-WAI Write Address Inputs
Te Write Enable Input (Active LOW)
RAO, RAI Read Address Inputs
RE Read Enable Input (Active LOW)
OI -04 Data Outputs
Absolute Maximum Ratings (Note)
If MllltarylAerospace specified devices are required,
please contact the National Semiconductor Sales
Offlce/Dlstrlbutors for availability and trptremeatlons.
Note: The "Absolute Maximum Ratings" am those values
beyond which the safety of the device cannot be guaran-
teed. The de vice should not be operated at these limits. The
parametric values dttfintrd in the "Electrical Characteristics"
table are not guaranteed at the absolute maximum ratings.
The "r%gornrnanded Operating Ctmtiitions''tatN will tiefinty
the conditions for actual device operation.
Supply Voltage 7V
Input Voltage 10V
Operating Free Air Temperature Range
54LS -55''C to + 125°C
DM74 tPC to + 70°C
Storage Temperature Range
--65"C to + 150'C
Recommended Operating Conditions
OLLS‘I
Symbol Parameter 54LS170 DM74LS170 Units
Mln Nom Max Min Nom Max
VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High Level Input Voltage 2 2 V
" Low Level Input Voltage 0.7 0.8 V
IOH High Level Output Current 20 20 pA
lor. Low Level Output Current 4 8 mA
TA Free Air Operating Temperature - 55 125 0 70 ''C
ts Setup Time HIGH or LOW
On to Rising WE 10 10 ns
th Hold Time HIGH or LOW
Dn to Rising WE 5.0 5.0 ns
ts Setup Time HIGH or LOW
WAn to Falling WE 10 IO ns
th Hold Time HIGH or LOW
WAn to Rising WE 5.0 5.0 ns
tw(L) Witt" or “FE Pulse Width LOW 25 25 ns
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Condltlons Mln (Note " Max Ulnts
V. Input Clamp Voltage Vcc = Min, h = --18 mA --1.5 V
VOH High Level Vcc = Min, lor, = Max, 54LS 2.0 V
VOL Low Level VCC = Min, IOL = Max, 54LS 0.4
OutputVoltage VIH = Min DM74 0.35 0.5 V
IOL = 4mA,Vcc = Min DM74 0.25 0.4
h InputCurrent @ Max Vcc = Max, V. = 10V Dns, RAO, WAO 0.1 m A
Input Voltage WE Tit" 0.2
IN High Level Input Current Vcc = Max, VI = 2.7V Inputs 20 P A
Ag, WE 40
IIL Low Level InputCurrent Vcc = Max, VI = 0.4V AT, WE -0.06 -th8
RAI, WA1 -0,05 --0.4 mA
DATA, RAD, WAO - 0.03 - 0.4
log Short Circuit Vcc = Max 54LS -20 - 100 m A
Output Current (Note 2) DM74 _ 20 _ 100
'0c Supply Current leg = Max, Dn, WE, 40 m A
RE = 4.5V,WAn, RAn = GND
Note t.. All typicals are at Voc = 5V, TA = 25'C.
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Switching Characteristics
Vcc == +5.0V, TA = +25''C, (See Section 1 for waveforms and load configurations)
Symbol Parameter Conditions Rt. = 2k, th. = " pF Units
Min Max
tpLH Propagation Delay' 35 ns
tpHL RAO or RA1 to On 35
tpLH Propagation Delay 30 ns
tpHL E to On 30
tpLH Propagation Delay 35 ns
tpHL Wit" to On 35
tpLH Propagation Delay 35 ns
tpHL On to On 35
'Measurad at least 25 ns after envy of new data at selected location.
Switching Waveforms
who, mu vm
WE Y,,, = st
(1.3Y for LS)
TUF/9820-6
FIGURE a
Write Function Table Read Function Table
Write Inputs D Inputs to - Read Int uta Outputs from
WE WAI WAO RE RA1 RAG
L L L Word 0 L L L Word 0
L L H Word 1 L L H Word 1
L H L Word 2 L H L Word 2
L H H Word 3 L H H Word 3
H X X None (Hold) H x X None (High Z)
H = HIGH Voltage Level
L = LOW Voltage Level
= Immaterial
Logic Diagram
mo -lyer
OLLS‘I
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
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This file is the datasheet for the following electronic components:
54LS170DMQB - product/54ls170dmqb?HQS=T|-nu|I-nulI-dscatalog-df—pf—nuII-wwe
54LS170FMQB - product/54Is170fmqb?HQS=T|-nul|-null-dscatalog-df—pf—nuII-wwe
54LS170DMQB - product/54ls170dmqb?HQS=T|-nu|I-nulI-dscatalog-df-pf-nulI-wwe
54LS170 - product/54Is170?HQS=T|—nul|—nu|I-dscataIog-df-pf-null-wwe
DM74LS170WM - product/dm74ls170wm?HQS=TI-nulI-nu|I-dscataIog-df-pf-null-wwe
DM74LS170N - product/dm74ls170n?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
DM74LS17ON - product/dm74ls170n?HQS=T|—nu|I-nu|I-dscataIog-df-pf-null-wwe
54LS170 - product/54Is170?HQS=T|—nul|—nu|I-dscataIog-df-pf-null-wwe
54LS170FMQB - product/54Is170fmqb?HQS=T|-null-null-dscatalog-df-pf-null-wwe
DM74LS170WM - product/dm74ls170wm?HQS=T|-nul|-nu|I-dscataIog-df-pf-null-wwe
DM74LS170N - product/dm74ls170n?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
DM74LS170WM - product/dm74ls170wm?HQS=T|—nulI—nu|I—dscataIog-df-pf-nulI-wwe
