MICROCIRCUIT DATA SHEET
MN54ACT818-X REV 1B0
8-Bit DIAGNOSTIC REGISTER
General Description
The ACT818 is a high speed general purpose pipeline register with an on-board diagnostic
register for performing serial diagnostics and/or writable control store loading.
The D-to-Y path provides and 8-bit parallel data path pipeline register for normal system
operation. The diagnostic register can load parallel data to or from the pinpline
register and can output data through the D input port (as in WCS loading).
The 8-bit diagnostic register has multiplexer inputs that select parallel inputs from the
Y-port or adjacent bits in the diagnostic register to operate as a right-shift-only
register. This register can then participate in a serial loop throughout the system where
normal data, address, status and control registers are replaced with ACT818 diagnostic
pipeline registers. The loop can be used to scan in a complete test routine starting
point (Data, Address, etc.). Then after a specified number of machine cycles it scans out
the results to be inspected for the expected results. WCS loading can be accomplished
using the same technique. An instruction word can be serially shifted into the shadow
register and written into the WCS RAM by enabling the D output.
Original Creation Date: 07/03/96
Last Update Date: 03/17/97
Last Major Revision Date: 07/03/96
Industry Part Number
54ACT818
NS Part Numbers
54ACT818DMQB
54ACT818FMQB
54ACT818LMQB
Prime Die
J818
Processing
MIL-STD-883, Method 5004
Subgrp Description
1
2
3
4
5
6
7
8A
8B
9
10
11
Static tests at
Static tests at
Static tests at
Dynamic tests at
Dynamic tests at
Dynamic tests at
Functional tests at
Functional tests at
Functional tests at
Switching tests at
Switching tests at
Switching tests at
Temp (
o
C)
+25 C
+125 C
-55 C
+25 C
+125 C
-55 C
+25 C
+125 C
-55 C
+25 C
+125 C
-55 C
Quality Conformance Inspection
MIL-STD-883, Method 5005
1
MN54ACT818-X REV 1B0
MICROCIRCUIT DATA SHEET
Features
-
-
-
-
-
-
-
-
On-line and off-line system diagnostics
Swaps the contents of diagnostic register and output register
Diagnostic register and diagnostic testing
Cascadable for wide control words as used in microprogramming
Edge-triggered D registers
Outputs source/sink 24 mA
ACT 181 has TTL-compatible inputs
ACT 818 is funtionally- and pin-compatible to AMD Am29818 and MMI 74S818
Applications
-
-
-
-
-
-
-
-
Register for microprogram control store
Status register
Data register
Instruction register
Interrupt mask register
Pipeline register
General purpose register
Parallel-serial/serial-parallel converter
2
MN54ACT818-X REV 1B0
MICROCIRCUIT DATA SHEET
(Absolute Maximum Ratings)
(Note 1)
Supply Voltage (Vcc)
-0.5V to +7.0V
DC Input
Vi =
Vi =
DC Input
Diode Current (Iik)
-0.5V
Vcc +0.5V
Voltage (Vi)
-20 mA
+20 mA
-0.5V to Vcc +0.5V
DC Output Diode Current (Iok)
Vo = -0.5V
Vo = Vcc +0.5V
DC Output Voltage (Vo)
DC Output Source or Sink Current (Io)
+50 mA
DC Vcc or Ground Current per Output Pin (Icc or Ignd)
+50 mA
Storage Temperature (Tstg)
-65 C to +150 C
Junction Temperature (Tj)
CDIP
PDIP
Note 1:
175 C
140 C
-20 mA
+20 mA
-0.5V to Vcc +0.5V
Absolute maximum ratings are those values beyond which damage to the device may
occur. The databook specifications should be met, without exception, to ensure that
the system design is reliable over its power supply, temperature, and output/input
loading variables. National does not recommend operation of FACT TM circuits outside
databook specifications.
Recommended Operating Conditions
(Note 1)
Supply Voltage (Vcc)
4.5V to 5.5V
Input Voltage (Vi)
0V to Vcc
Output Voltage (Vo)
0V to Vcc
Operating Temperature (Ta)
-55 C to +125 C
Minimum
ACT
Vin
Vcc
Note 1:
Input Edge Rate (Delta V/Delta t)
Devices
from 0.8V to 2.0V
@ 4.5V, 5.5V
125 mV/ns
Plastic DIP packaging is not recommended for applications requiring greater than 3000
temperature cycles from 0 C to 125 C.
3
MN54ACT818-X REV 1B0
MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: VCC 4.5V to 5.5V, Temp range: -55C to +125C
NOTE: -55C TEMPERATURE, SUBGROUP 3 IS GUARANTEED BUT NOT
TESTED.
SYMBOL
IIH
PARAMETER
High Level Input
Current
Low Level Input
Current
Low Level Output
Voltage
CONDITIONS
VCC=5.5V, VM=5.5V, VINL=0.0V
NOTES
PIN-
NAME
MIN
MAX
0.1
1.0
-0.1
-1.0
.10
.10
.50
.36
.50
.36
1.65
4.40
5.40
4.70
4.86
3.70
3.86
3.85
10.0
0.5
10.0
0.5
-10.0
-0.5
-10.0
-0.5
UNIT
uA
uA
uA
uA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
uA
uA
uA
uA
uA
uA
uA
uA
SUB-
GROUPS
1
2, 3
1
2, 3
1, 2,
3
1, 2,
3
2, 3
1
2, 3
1
1, 2,
3
1, 2,
3
1, 2,
3
2, 3
1
2, 3
1
1, 2,
3
2, 3
1
2, 3
1
2, 3
1
2, 3
1
1, 2 IN
1, 2 IN
IIL
VCC=5.5V, VM=0.0V, VINH=5.5V,
VINL=0.0V
VCC=4.5V, VINH=4.5V, VIL=0.8V,
VIH=2.0V, IOL=50.0uA
VCC=5.5V, VINH=5.5V, VIL=0.8V,
VIH=2.0V, IOL=50.0uA
VCC=4.5V, VINH=4.5V, VIL=0.8V,
VIH=2.0V, IOL=24.0mA
VCC=5.5V, VINH=5.5V, VIL=0.8V,
VIH=2.0V, IOL=24.0mA
1, 2 IN
1, 2 IN
VOL
1, 2 OUT
1, 2 OUT
1, 2 OUT
1, 2 OUT
1, 2 OUT
1, 2 OUT
VIOL
VOH
Input Offset
Voltage Low
High Level Output
Voltage
VCC=5.5V, VINH=5.5V, VIL=0.8V,
IOL=50.0mA
VCC=4.5V, VIL=0.8V, VIH=2.0V,
IOH=-50.0uA
VCC=5.5V, VIL=0.8V, VIH=2.0V,
IOH=-50.0uA
VCC=5.5V, VIL=0.8V, VIH=2.0V,
IOH=-24.0mA
VCC=4.5V, VIL=0.8V, VIH=2.0V,
IOH=-24.0mA
1,
OUT
2, 5
1, 2 OUT
1, 2 OUT
1, 2 OUT
1, 2 OUT
1, 2 OUT
1, 2 OUT
VIOH
IOZH
Input Offset
Voltage High
Maximum TRI-STATE
VCC=5.5V, VIL=0.8V, VIH=2.0V,
IOH=-50.0mA
VCC=4.5V, VIH=2.0V, VM=4.5V, VINL=0.0V
1,
OUT
2, 5
1, 2 OUT
1, 2 OUT
VCC=5.5V, VIH=2.0V, VM=5.5V, VINL=0.0V
1, 2 OUT
1, 2 OUT
IOZL
Maximum TRI-STATE
VCC=4.5V, VIH=2.0V, VM=0.0V, VINH=4.5V
1, 2 OUT
1, 2 OUT
VCC=5.5V, VIH=2.0V, VM=0.0V, VINH=5.5V
1, 2 OUT
1, 2 OUT
4
MN54ACT818-X REV 1B0
MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS(Continued)
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: VCC 4.5V to 5.5V, Temp range: -55C to +125C
NOTE: -55C TEMPERATURE, SUBGROUP 3 IS GUARANTEED BUT NOT
TESTED.
SYMBOL
ICCH
PARAMETER
Supply Current
Outputs HIGH
Supply Current
Outputs LOW
Supply Current
Outputs Tri-State
Supply Current
per Input
CONDITIONS
VCC=5.5V, VINH=5.5V, VINL=0.0V
NOTES
PIN-
NAME
MIN
MAX
8.0
160
8.0
160
8.0
160
1.0
1.6
UNIT
uA
uA
uA
uA
uA
uA
mA
mA
SUB-
GROUPS
1
2, 3
1
2, 3
1
2, 3
1
2, 3
1, 2 VCC
1, 2 VCC
ICCL
VCC=5.5V, VINL=0.0V
1, 2 VCC
1, 2 VCC
ICCZ
VCC=5.5V, VINH=5.5V, VINL=0.0V
1, 2 VCC
1, 2 VCC
ICCT
VCC=5.5V, VIHT=VCC-2.1V
1, 2 VCC
1, 2 VCC
AC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC: CL=50pF, RL=500 OHMS, TR/TF=3.0nS.
NOTE: -55C TEMPERATURE, SUBGROUP 11 IS GUARANTEED BUT NOT
TESTED.
tpLH1
Propagation Delay
Vcc=4.5V
3,
PCLK-Yn 2.5
4, 7
3,
PCLK-Yn 2.5
4, 7
tpLH2
Propagation Delay
Vcc=4.5V
3,
DCLK-SD 3.5
4, 7 O
3,
DCLK-SD 3.5
4, 7 O
tpLH3
Propagation Delay
Vcc=4.5V
3,
MODE-SD 3.5
4, 7 O
3,
MODE-SD 3.5
4, 7 O
tpLH4
Propagation Delay
Vcc=4.5V
3,
SDI-SDO 3.0
4, 7
3,
SDI-SDO 3.0
4, 7
tpHL1
Propagation Delay
Vcc=4.5V
3,
PCLK-Yn 2.5
4, 7
3,
PCLK-Yn 2.5
4, 7
tpHL2
Propagation Delay
Vcc=4.5V
3,
DCLK-SD 3.5
4, 7 O
3,
DCLK-SD 3.5
4, 7 O
8.5
10.0
12.0
15.5
11.0
13.5
10.0
12.0
8.0
10.0
11.5
14.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
9
10, 11
9
10, 11
9
10, 11
9
10, 11
9
10, 11
9
10, 11
5
stm32/stm8
