CDP1854ACD3 Intersil Corporation, CDP1854ACD3 Datasheet

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CDP1854ACD3

Manufacturer Part Number
CDP1854ACD3
Description
High Reliability CMOS Programmable Universal Asynchronous Receiver/Transmitter (UART)
Manufacturer
Intersil Corporation
Datasheet

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March 1997
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
Features
• Two Operating Modes
• Full or Half-Duplex Operation
• Parity, Framing, and Overrun Error Detection
• Fully Programmable with Externally Selectable Word
Ordering Information
Pinouts
SBDIP
PACK-
- Mode 0 - Functionally Compatible with Industry
- Mode 1 - Interfaces Directly with CDP1800 Series
Length (5-8 Bits), Parity Inhibit, Even/Odd Parity, and
1, 1-1/2, or 2 Stop Bits
AGE
Types Such as the TR1602A and CDP6402
Microprocessors without Additional Components
MODE (V
CDP1854A/3, CDP1854AC/3 (SBDIP) (MODE 0)
R CLOCK
-55
R BUS 7
R BUS 6
R BUS 5
R BUS 4
R BUS 3
R BUS 2
R BUS 1
R BUS 0
o
VDD
RRD
DAR
RANGE
SFD
C to +125
V
TEMP.
SDI
SS
OE
DA
PE
FE
SS
)
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
|
o
Intersil (and design) is a trademark of Intersil Americas Inc.
C CDP1854ACD3 CDP1854ACD3 D40.6
TM
TOP VIEW
5V/200K
BAUD
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
10V/400K
T CLOCK
EPE
WLS 1
WLS 2
SBS
PI
CRL
T BUS 7
T BUS 6
T BUS 5
T BUS 4
T BUS 3
T BUS 2
T BUS 1
T BUS 0
SD0
TSRE
THRL
THRE
MR
BAUD
High Reliability CMOS Programmable Universal
Asynchronous Receiver/Transmitter (UART)
PKG.
NO.
1
Description
The CDP1854A/3 and CDP1854AC/3 are high reliability
silicon gate CMOS Universal Asynchronous Receiver/Trans-
mitter (UART) circuits. They are designed to provide the
necessary formatting and control for interfacing between
serial and parallel data. For example, these UARTs can be
used to interface between a peripheral or terminal with serial
I/O ports and the 8-bit CDP1800-series microprocessor
parallel data bus system. The CDP1854A/3 is capable of full
duplex operation, i.e., simultaneous conversion of serial
input data to parallel output data and parallel input data to
serial output data.
The CDP1854A/3 UART can be programmed to operate in
one of two modes by using the mode control input. When the
mode input is high (MODE = 1), the CDP1854A/3 is directly
compatible with the CDP1800 series microprocessor system
without additional interface circuitry. When the mode input is
low (MODE = 0), the device is functionally compatible with
industry standard UARTs such as the TR1602A and
CDP6402. It is also pin compatible with these types, except
that pin 2 is used for the mode control input.
The CDP1854A/3 and the CDP1854AC/3 are functionally
identical. The CDP1854A/3 has a recommended operating
voltage range of 4V to 10.5V, and the CDP1854AC/3 has a
recommended operating voltage range of 4V to 6.5V.
MODE (V
CDP1854A/3, CDP1854AC/3 (SBDIP) (MODE 1)
R CLOCK
R BUS 7
R BUS 6
R BUS 5
R BUS 4
R BUS 3
R BUS 2
R BUS 1
R BUS 0
PE/OE
CDP1854AC/3
RSEL
TPB
V
CS2
V
DD
SDI
INT
DA
DD
FE
SS
CDP1854A/3,
)
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
NC = NO CONNECT
TOP VIEW
File Number
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
T CLOCK
CTS
ES
PS1
NC
CS3
RD/WR
T BUS 7
T BUS 6
T BUS 5
T BUS 4
T BUS 3
T BUS 2
T BUS 1
T BUS 0
SD0
RTS
CS1
THRE
CLEAR
1715.2

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CDP1854ACD3 Summary of contents

Page 1

... Fully Programmable with Externally Selectable Word Length (5-8 Bits), Parity Inhibit, Even/Odd Parity, and 1, 1-1/ Stop Bits Ordering Information PACK- TEMP. 5V/200K AGE RANGE BAUD o o SBDIP - +125 C CDP1854ACD3 CDP1854ACD3 D40.6 Pinouts CDP1854A/3, CDP1854AC/3 (SBDIP) (MODE 0) TOP VIEW VDD 1 MODE ( RRD 4 ...

Page 2

Absolute Maximum Ratings DC Supply-Voltage Range (All voltages referenced to V terminal) SS CDP1854A ...

Page 3

Specifications CDP1854A/3, CDP1854AC/3 Operating Conditions Full Package-Temperature Range. For maximum reliability, operating conditions should be selected A so that operation is always within the following ranges: PARAMETER DC Operating Voltage Range Input Voltage Range Baud Rate (Receive ...

Page 4

Dynamic Electrical Specifications PARAMETER RECEIVER TIMING - MODE 1 Clock Period Pulse Width Clock Low Level Clock High Level TPB Setup Time Data Start Bit to Clock Propagation Delay Time TPB to DATA AVAILABLE Clock to DATA AVAILABLE Clock to ...

Page 5

TRANSMITTER HOLDING REGISTER LOADED (NOTE 1) T CLOCK WRITE (TPB) (NOTE TTH THRE SDO NOTES: 1. The holding register is loaded on the trailing edge of TPB. 2. The transmitter shift register, if empty, is loaded ...

Page 6

Dynamic Electrical Specifications PARAMETER CPU INTERFACE - WRITE TIMING - MODE 1 Pulse Width TPB Setup Time RSEL to Write Data to Write Hold Time RSEL after Write Data after Write TPB (NOTE 1) RSEL T BUS 0- T BUS ...

Page 7

Dynamic Electrical Specifications PARAMETER CPU INTERFACE - READ TIMING - MODE 1 Pulse Width TPB Setup Time RSEL to TPB Hold Time RSEL after TPB Propagation Delay Time Read to Data Valid Time RESEL to Data Valid Time TPB RSEL ...

Page 8

Dynamic Electrical Specifications PARAMETER INTERFACE TIMING - MODE 0 Pulse Width CRL MR Setup Time Control Word to CRL Hold Time Control Word after CRL Propagation Delay Time SFD High to SOD SFD Low to SOD RRD High to Receiver ...

Page 9

Dynamic Electrical Specifications PARAMETER TRANSMITTER TIMING - MODE 0 Clock Period Pulse Width Clock Low Level Clock High Level THRL Setup Time THRL to Clock Data to THRL Hold Time Data after THRL Propagation Delay Time Clock to Data Start ...

Page 10

CLOCK t THC THRL t THTH SDO t TTHR THRE TSRE BUS 0 T BUS 7 NOTES: 1. The holding register is loaded on the trailing edge of THRL. 2. The transmitter ...

Page 11

Dynamic Electrical Specifications PARAMETER RECEIVER TIMING - MODE 0 Clock Period Pulse Width Clock Low Level Clock High Level DATA AVAILABLE RESET Setup Time Data Start Bit to Clock Propagation Delay Time DATA AVAILABLE RESET to Data Available Clock to ...

Page 12

... Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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