Motorola MC14469P, MC14469FN Datasheet
MC14469MOTOROLA
1
CMOS
The MC14469 receives one or two 11–bit words in a serial data stream. One
of the incoming words contains the address and when the address matches, the
MC14469 then transmits information in two 11–bit word data streams. Each of
the transmitted words contains eight data bits, an even parity bit, and start and
stop bits.
The received word contains seven address bits with the address of the
MC14469 set on seven pins. Therefore, 27 or 128 units can be interconnected
in simplex or full–duplex data transmission. In addition to the address received,
seven command bits may be received for general–purpose data or control use.
The MC14469 finds application in transmitting data from remote analog–to–
digital converters, remote MPUs, or remote digital transducers to the master
computer or MPU.
• Supply Voltage Range: 4.5 V to 18 V
• Low Quiescent Current: 75 µA Maximum @ 5 V, 25°C
• Guaranteed Data Rates to 4800 Baud @ 5 V, to 9600 Baud @ 12 V
• Receive — Serial to Parallel
Transmit — Parallel to Parallel
• Transmit and Receive Simultaneously in Full Duplex
• Crystal or Resonator Operation for On–Chip Oscillator
• See Application Note AN806A
• Chip Complexity: 1200 FETs or 300 Equivalent Gates
PIN ASSIGNMENTS
P SUFFIX
5
4
3
2
1
8
7
6
37
38
39
40
34
35
36
33
C6
C5
C4
C0
V
DD
C1
C2
C3
A0
RESET
OSC2
OSC1
A3
A2
A1
A4
13
12
11
10
9
16
15
14
29
30
31
32
26
27
28
25
S4
S3
S2
VAP
CS
SEND
S0
S1
ID1
ID0
A6
A5
ID4
ID3
ID2
ID5
17
20
19
18
22
23
24
21
TRO
S7
S6
S5
RI
ID7
ID6
V
SS
FN SUFFIX
2827262524232221201918
4041424344123456
29
30
31
32
33
34
35
36
37
38
39
17
16
15
14
13
12
11
10
9
8
7
S3
S2
S1
S0
SEND
NC
VAP
CS
C6
C5
C4
ID4
ID3
ID2
ID1
ID0
NC
A6
A5
A4
A3
A2
A1A0RESET
OSC2
OSC1NCC0C1C2
C3
V
DD
ID5
ID6
ID7
RI
V
NC
TRO
S7S6S5
S4
SS
NC = NO CONNECTION
Order this document
by MC14469/D
SEMICONDUCTOR TECHNICAL DATA
P SUFFIX
PLASTIC DIP
CASE 711
FN SUFFIX
PLCC PACKAGE
CASE 777
ORDERING INFORMATION
MC14469P Plastic DIP
MC14469FN PLCC Package
40
1
44
1
Motorola, Inc. 1995
MC14469 MOTOROLA
2
BLOCK DIAGRAM
CLOCKS
TRANSMIT
RECEIVE
STATUS
STROBE
(S0 – S7)
STATUS
2
LOAD
SELECT
STATIC SHIFT REGISTER
8
8
STATUS
LATCHES
8
CLOCK
DATA RATE CLOCK
SEND ENABLE
SEND
4
7
77
STATIC SHIFT REGISTER
TIMING AND CONTROL
AND PARITY CHECK
COMMAND
LATCHES
ADDRESS CONTROL
AND DATA COMPARATOR
RECEIVE
DATA
STROBE
RECEIVE
DATA
(RI)
CLOCK
COMPARE
CLOCK
RVAL
VALID ADDRESS
PULSE (VAP)
SEND ENABLE
LATCH (SEL)
RECEIVE DATA
STROBE ENABLE
COMMAND
STROBE (CS)
STROBE
(C0 – C6)
COMMAND DATA
(A0 – A6)
ADDRESS
RVAL
CLOCK
GENERATOR
CLOCK
OSCILLATOR
OUTPUT
LOGIC
CONTROL AND PARITY
GENERATOR
RECEIVE DATA STROBE ENABLE
RECEIVE DATA STROBE
OSC2
OSC1
STATUS STROBE
(ID0 – ID7)
INPUT DATA
DATA RATE CLOCK
TRANSMIT
DATA (TRO
)
MC14469MOTOROLA
3
MAXIMUM RATINGS (Voltages referenced to V
SS
)
Rating
Symbol Value Unit
DC Supply Voltage V
DD
– 0.5 to + 18 V
Input Voltage, All Inputs V
in
– 0.5 to VDD + 0.5 V
DC Current Drain per Pin I 10 mA
Operating Temperature Range T
A
– 40 to + 85 °C
Storage Temperature Range T
stg
– 65 to + 150 °C
ELECTRICAL CHARACTERISTICS (Voltages referenced to V
SS
)
– 40°C 25°C 85°C
Characteristic Symbol
V
DD
Min Max Min Max Min Max Unit
Output Voltage
Vin= VDD or 0 “0” Level
V
OL
5.0
10
15
—
—
—
0.05
0.05
0.05
—
—
—
0.05
0.05
0.05
—
—
—
0.05
0.05
0.05
V
Vin= 0 or V
DD
“1” Level V
OH
5.0
10
15
4.95
9.95
14.95
—
—
—
4.95
9.95
14.95
—
—
—
4.95
9.95
14.95
—
—
—
V
Input Voltage (Except OSC1)
VO= 4.5 or 0.5 V “0” Level
VO= 9.0 or 1.0 V
VO= 13.5 or 1.5 V
V
IL
5.0
10
15
—
—
—
1.5
3.0
4.0
—
—
—
1.5
3.0
4.0
—
—
—
1.5
3.0
4.0
V
VO= 0.5 or 4.5 V “1” Level
VO= 1.0 or 9.0 V
VO= 1.5 or 13.5 V
V
IH
5.0
10
15
3.5
7.0
11
—
—
—
3.5
7.0
11
—
—
—
3.5
7.0
11
—
—
—
V
Output Drive Current (Except OSC2)
VOH= 2.5 V Source
VOH= 4.6 V
VOH= 9.5 V
VOH= 13.5 V
I
OH
5.0
5.0
10
15
– 1.0
– 0.2
– 0.5
– 1.4
—
—
—
—
– 0.8
– 0.16
– 0.4
– 1.2
—
—
—
—
– 0.6
– 0.12
– 0.3
– 1.0
—
—
—
—
mA
VOL= 0.4 V Sink
VOL= 0.5 V
VOL= 1.5 V
I
OL
5.0
10
15
0.52
1.3
3.6
—
—
—
0.44
1.1
3.0
—
—
—
0.36
0.9
2.4
—
—
—
mA
Output Drive Current (OSC2 Only)
VOH= 2.5 V Source
VOH= 4.6 V
VOH= 9.5 V
VOH= 13.5 V
I
OH
5.0
5.0
10
15
– 0.19
– 0.04
– 0.09
– 0.29
—
—
—
—
– 0.16
– 0.035
– 0.08
– 0.27
—
—
—
—
– 0.13
– 0.03
– 0.06
– 0.2
—
—
—
—
mA
VOL= 0.4 V Sink
VOL= 0.5 V
VOL= 1.5 V
I
OL
5.0
10
15
0.1
0.17
0.5
—
—
—
0.085
0.14
0.42
—
—
—
0.07
0.1
0.3
—
—
—
mA
OSC Frequency* f
OSC
4.5
12
0
0
400
800
0
0
365
730
0
0
310
620
kHz
Input Current I
in
15 — ± 0.3 — ± 0.3 — ± 1.0 µA
Pull–Up Current (A0 – A6, ID0 – ID7) I
UP
15 12 120 10 100 8.0 85 µA
Input Capacitance (Vin = 0) C
in
— — — — 7.5 — — pF
Quiescent Current (Per Package) I
DD
5.0
10
15
—
—
—
75
150
300
—
—
—
75
150
300
—
—
—
565
1125
2250
µA
Supply Voltage V
DD
— + 4.5 + 18 + 4.5 + 18 + 4.5 + 18 V
*310 kHz at 85°C guarantees 4800 baud; 620 kHz at 85°C guarantees 9600 baud.
This device contains circuitry to protect the
inputs against damage due to high static voltages or electric fields; however, it is advised that
normal precautions be taken to avoid application
of any voltage higher than maximum rated
voltages to this high–impedance circuit. For
proper operation it is recommended that Vin and
V
out
be constrained to the range VSS ≤ (Vin or
V
out
) ≤ VDD.
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., either V
SS
or VDD).
MC14469 MOTOROLA
4
Figure 1. Data Format and Corresponding Data Position and Pins for MC14469 and MC6850
A0 to A6 = ADDRESS BITS
ID0 to ID7 = MC14469 IDENTIFICATION CODE
S0 to S7 = MC14469 STATUS CODE
D0 to D7 = ACIA BUS BITS
C0 to C6 = COMMAND BITS
SP = STOP BIT
P = PARITY BIT
ST = START BIT
D7D6D5D4D3D2D1D0
S7S6S5S4S3S2S1S0
D6D5D4D3D2D1D0
C6C5C4C3C2C1C0
D7D6D5D4D3D2D1D0
ID7ID6ID5ID4ID3ID2ID1ID0
PIN DESIGNATION
MC6850
PIN DESIGNATION
MC14469
TRANSMIT DATA (TRO
)
RECEIVE DATA (RI)
D6D5D4D3D2D1D0
A6A5A4A3A2A1A0
PIN DESIGNATION
MC6850
PIN DESIGNATION
MC14469
STATUSINPUT DATA
SPPST
SPPST
COMMAND
IDENTIFIER
(LOW LOGIC LEVEL)
COMMAND
SPPST
ADDRESS
IDENTIFIER
(HIGH LOGIC LEVEL)
ADDRESS
SPPST
S
P
S
M
S
B
Figure 2. Typical Receive/Send Cycle
TRANSMIT OUT
(TRO
)
STATUSID
SEND INPUT
(SEND)
COMMAND STROBE
OUTPUT (CS)
INTERNAL SEND
ENABLE LATCH
(SEL)
INTERNAL VALID
ADDRESS LATCH
(VAL)
VALID ADDRESS PULSE
(VAP)
S
P
X
S
3 7654210T3 765421
M
S
B
P
XXXXXXXPXXXXXX
XXXXXXX
XXXXXXX
S
T
S
T
RECEIVER INPUT (RI)
COMMANDADDRESS
M
S
B
M
S
B
S
P
S
P
76543210
76543210
P
P
T 0
X
X
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