Philips Semiconductors

Preliminary specification

SC28L194

Quad UART for 3.3V and 5V supply voltage

1998 Sep 21

3

ORDERING CODE

PACKAGES

Industrial

Industrial

DWG #

Industrial

-40

°C to +85°C

Industrial

-40

°C to +85°C

68-Pin Plastic Leaded Chip Carrier (PLCC)

SC28L194A1A

SC28L194A1A

SOT188-3

80-Pin Plastic Low Profile Quad Flat Pack (LQFP)

SC28L194A1BE

SC28L194A1BE

SOT315-1

PIN CONFIGURATIONS

9

161

10

26

27

43

44

60

80

61

1

20

21

40

41

60

68-Pin PLCC

TOP VIEW

80-Pin LQFP

TOP VIEW

SD00544

Figure 1.

Pin Configurations

PINOUT - 68 PIN PACKAGE

Pin Assignments

4 Vss_ic, 4 Vcc_i, 4 Vss_o, 2 Vcc_o, 2Vcc_c

1

Vss_ic

24

I/O0c

47

D1

2

Vcc_c

25

I/O1c

48

D2

3

Vcc_i

26

Vss_o

49

D3

4

W_RN

27

I/O2c

50

VCC_O

5

A0

28

I/O3c

51

D4

6

CEN

29

RxDc

52

D5

7

DACKN

30

TxDc

53

VSS_IC

8

I/O0a

31

RxDd

54

VCC_I

9

I/O1a

32

TxDd

55

D6

10

I/O2a

33

Vcc_c

56

D7

11

I/O3a

34

Vcc_i

57

IRQN

12

Vss_o

35

Vss_ic

58

IACKN

13

RxDa

36

RESETN

59

VSS_O

14

TxDa

37

Gin0

60

X1

15

I/O0b

38

Gin1

61

X2

16

I/O1b

39

I/O0d

62

A7

17

Vcc_o

40

I/O1d

63

A5

18

Vcc_i

41

I/O2d

64

A4

19

Vss_ic

42

Gout0

65

A3

20

I/O2b

43

I/O3d

66

A2

21

I/O3b

44

Gout1

67

A1

22

RxDb

45

Vss_o

68

SClk

23

TxDb

46

D0

PINOUT - 80 PIN THIN PACKAGE

Pin Assignments

4 Vss_ic, 4 Vcc_i, 4 Vss_o, 2 Vcc_o, 2Vcc_c

1

I/O1a

28

TxDd

54

D6

2

I/O2a

29

Vcc_c

55

D7

3

I/O3a

30

Vcc_i

56

IRQN

4

Vss_o

31

Vss_ic

57

IACKN

5

RxDa

32

RESETN

58

Vss_o

6

TxDa

33

Gin0

59

X1

7

I/O0b

34

Gin1

60

X2

8

I/O1b

35

I/O0d

61-62

nc

9

Vcc_o

36

I/O1d

63

A7

10

Vcc_i

37

I/O2d

64

A5

11

Vss_ic

38

Gout0

65

A4

12

I/O2b

39-41

nc

66

A3

13

I/O3b

42

I/O3d

67

A2

14

RxDb

43

Gout1

68

A1

15

TxDb

44

Vss_o

69

SClk

16

I/O0c

45

D0

70

Vss_ic

17

I/O1c

46

D1

71

Vcc_c

18

Vss_o

47

D2

72

Vcc_i

19

I/O2c

48

D3

73

W_RN

20-23

nc

49

Vcc_o

74

A0

24

I/O3c

50

D4

75

CEN

25

RxDc

51

D5

76

DACKN

26

TxDc

52

Vss_ic

77

I/O0a

27

RxDd

53

Vcc_i

78-80

nc

NOTE: The Vss-ic and Vcc_i are for input and noise sensitive circuits. Sclk signals in the range of 3 to 6 ns and within TTL input levels may

alter expected read or write functions. The Vss _o and Vcc _o pins are used for the high current drivers. De-coupling capacitors should be used

as close to the device power pins as possible. Address bit A6 is not used. See “Host Interface” section.