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Details, datasheet, quote on part number:9308J
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Datasheet text preview:
9308 DM9308 Dual 4-Bit Latch
June 1989
9308 DM9308 Dual 4-Bit Latch
General Description
The 9308 is a dual 4-bit D-type latch designed for general purpose storage applications in digital systems Each latch contains both an active LOW Master Reset input an active LOW Enable inputs The 74116 is a pin for pin equivalent of C the 9308
onnection Diagram
Dual-In-Line Package
Logic Symbol
TL F 10208 2
VCC e Pin 24 GND e Pin 12
TL F 10208 1
Order Number 9308DMQB 9308FMQB or DM9308N See NS Package Number J24A N24A or W24C
Pin Names D0a D3a D0b D3b E0a E1a E0b E1b MRa MRb Q0a Q3a Q0b Q3b
Description Parallel Latch Inputs AND Enable Inputs (Active LOW) Master Reset Inputs (Active LOW) Parallel Latch Outputs
(
(
C1995 National Semiconductor Corporation
TL F 10208
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings (Note)
p If Military Aerospace specified devices are required lease contact the National Semiconductor Sales S Office Distributors for availability and specifications upply Voltage Input Voltage 7V 5 5V Note 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'' table are not guaranteed at the absolute maximum ratings T he ``Recommended Operating Conditions'' table will define the conditions for actual device operation
Operating Free Air Temperature Range R b 55 C to a 125 C MIL COM 0 C to a 70 C Storage Temperature Range
b 65
C to a 150 C
ecommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA ts (H) th (H) ts (L) th (L) tw (L) tw (L) trec Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature Setup Time HIGH Dn to En Hold Time HIGH Dn to En Setup Time LOW Dn to En Hold Time LOW Dn to En En Pulse Width LOW MR Pulse Width LOW Recovery Time MR to En
b 55
Military Nom 5 Max 55 Min 4 75 2 08
b0 8
Commercial Nom 5 Max 5 25
Units V V 08
b0 8
45 2
V mA mA
16 125 0 10
b2 0
16 70
C
ns ns ns ns ns ns ns
6 4 10 4 18 18 10
12 8 18 18 8
Electrical Characteristics over recommended operating free air temperature (unless otherwise noted)
Symbol VI VOH VOL II IIH IIL IOS ICC Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Input Current Input Voltage
Max
Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V VCC e Max VI e 2 4V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max (Note 3) MIL COM
Min
Typ (Note 1)
Max
b1 5
Units V V
2
4 04 1 40
b1 6
V mA mA mA mA mA
High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current
b 20 b 20
b 70 b 57
100
Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second ote 3 ICC is measured with all outputs open and all inputs grounded 2
Functional Description
Data can be entered into the latch when both of the enable inputs are LOW As long as this logic condition exists the output of the latch will follow the input If either of the enable inputs goes HIGH the data present in the latch at that time T is held in the latch and is no longer affected by data input he master reset overrides all other input conditions and forces the outputs of all the latches LOW when a LOW signal is applied to the Master Reset input
ruth Table
MR H H H H TH L E0 L L L H H X E1 L L H L H X D L H X X X X Qn L H Qnb1 Qnb1 Qnb1 L Operation Data Entry Data Entry Hold Hold Hold Reset
Qnb1 e Previous Output State Qn e Present Output State H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial
Logic Diagram
TL F 10208 3
Switching Characteristics VCC e a 5 0V
Symbol Parameter
TA e a 25 C (See Section 5 for test waveforms and output load ) 9308 CL e 15 pF RL e 400X Min Max 30 22 15 18 22 ns ns ns Units
tPLH tPHL tPLH tPHL tPHL
Propagation Delay En to Qn Propagation Delay Dn to Qn Propagation Delay MR to Qn
3
4
Physical Dimensions inches (millimeters)
24-Lead Ceramic Dual-In-Line Package (J) Order Number 9308DMQB NS Package Number J24A
24-Lead Molded Dual-In-Line Package (N) Order Number DM9308N NS Package Number N24A
5
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