Page 1
Page 1 of 4
IA6850 Advanced Information Sheet
Asynchronous Communications Interface Adapter (ACIA)
FEATURES
• Form, Fit, and Function Compatible with the Motorola MC6850
• Packaging option available: 24 Pin Plastic DIP
• Programmable Word Length, Stop Bits, and Parity
• Error Detection
• Divide by 1, 16, or 64 operation
• TBD Equivalent gates.
The IA6850 uses innovASIC’s innovative new f 3 Program to provide industry with parts that other
vendors have declared obsolete. By specifying parts through this program a customer is assured of
never having a component become obsolete again. This advanced information sheet assumes the
original part has been designed in, and so provides a summary of capabilities only. For new designs
contact innovASIC for more detailed information.
Motorola is a copyright trademark of Motorola, Inc.
VSS
RXDATA
RXCLK
TXCLK
RTS_n
TXDATA
IRQ_n
CS0
Package Pinout
(1)
(2)
24 Pin DIP
(3)
(4)
(5)
(6)
(7)
(8)
(9)CS2_n
(10)CS1
(11)RS
(12)VCC
IA6850
(24)
(23)
(22)
(21)
(20)
(19)
(18)
(17)
(16)
(15)
(14)
(13)
CTS_n
DCD_n
D0
D1
D2
D3
D4
D5
D6
D7
E
R/W_n
Copyright 1999, InnovASIC Inc.
Customer Specific IC Solutions
Page 2
Page 2 of 4
IA6850 Advanced Information Sheet
Asynchronous Communications Interface Adapter (ACIA)
The IA6850 is an ACIA megafunction used to interface a microprocessor to a serial communications
channel, and is functionally equivalent to the Motorola MC6850. This function receives and transmits
data in a variety of configurations including 7 or 8 bit data words, odd, even, or nor parity, and 1 or 2
stop bits.
A block diagram is shown in Figure 1.
Functional Block Diagram
Figure 1
TXCLK
R/W_n
CS0
CS1
CS2_n
RS
E
D0
D1
D2
D3
D4
D5
D6
D7
CHIP
SELECT
AND
READ/WRITE
CONTROL
DATA
BUS
BUFFERS
TRANSMIT
DATA
REGISTER
STATUS
REGISTER
CONTROL
REGISTER
CLOCK
GEN
TRANSMIT
SHIFT
REGISTER
TRANSMIT
CONTROL
RECEIVE
CONTROL
PARITY
GEN
INTERRUPT
LOGIC
TXDATA
CTS_n
IRQ_n
DCD_n
RTS_n
PARITY
CHECK
RXCLK
RECEIVE
DATA
REGISTER
Copyright 1999, InnovASIC Inc.
Customer Specific IC Solutions
RECEIVE
SHIFT
REGISTER
CLOCK
GEN
RXDATA
SYNC
LOGIC
Page 3
Page 3 of 4
IA6850 Advanced Information Sheet
Asynchronous Communications Interface Adapter (ACIA)
Qualification Levels
Table 1
Part Number Environmental/ Qual Level
IA6850-PDW24C Commercial
IA6850-PDW24I Industrial
The following diagram depicts the innovASIC Product Identification Number.
IAXXXXX-PPPPNNNT/SP
Special Processing:
S = Space
Q = MIL-STD-883
Temperature:
C = Commercial
I = Industrial
M = Military
Number of Leads
Package Type:
Per Package Designator Table
IC Base Number
innovASIC Designator
Copyright 1999, InnovASIC Inc.
Customer Specific IC Solutions
Page 4
Page 4 of 4
IA6850 Advanced Information Sheet
Asynchronous Communications Interface Adapter (ACIA)
Package Designator Table
Package Type
innovASIC
Designator
Ceramic side brazed Dual In-line CDB
Cerdip with window CDW
Ceramic leaded chip carrier CLC
Cerdip without window CD
Ceramic leadless chip carrier CLL
PLCC PLC
Plastic DIP standard (300 mil) PD
Plastic DIP standard (600 mil) PDW
Plastic metric quad flat pack PQF
Plastic thin quad flat pack PTQ
Skinny Cerdip CDS
Small outline plastic gull-wing(150 mil body) PSO
Small outline medium plastic gull-wing (207 mil body) PSM
Small outline narrow plastic gull wing (150 mil body) PSN
Small outline wide plastic gull wing (300 mil body) PSW
Skinny Plastic Dip PDS
Shrink small outline plastic (5.3mm .208 body) PS
Thin shrink small outline plastic PTS
Small outline large plastic gull wing (330 mil body) PSL
Thin small outline plastic gull-wing (8 x 20mm) [TSOP] PST
PGA CPGA
BGA CBGA
Contact innovASIC for other package and processing options.
Copyright 1999, InnovASIC Inc.
Customer Specific IC Solutions
Loading...