Philips 74abt843 DATASHEETS

INTEGRATED CIRCUITS

74ABT843

9-bit interface latch with set and reset (3-State)

Product specification Supersedes data of 1995 Sep 06

IC23 Data Handbook

 

1998 Jan 16

Philips Semiconductors Product specification

9-bit bus interface latch with set and reset (3-State)

FEA TURES

•High speed parallel latches

•Extra data width for wide address/data paths or buses carrying

parity

•Ideal where high speed, light loading, or increased fan-in are

required with MOS microprocessors

•Slim DIP 300 mil package

•Broadside pinout

•Output capability: +64mA/–32mA

•Latch-up protection exceeds 500mA per Jedec Std 17

•ESD protection exceeds 2000V per MIL STD 883 Method 3015

and 200V per Machine Model

•Power-up 3-State

•Power-up reset

QUICK REFERENCE DATA

SYMBOL PARAMETER

C

t

PLH

t

PHL

C

OUT

I

CCZ

IN

Propagation delay Dn to Qn

CL = 50pF; VCC = 5V 5.0 ns

Input capacitance VI = 0V or V

Output capacitance

Outputs disabled; VO = 0V or V

Total supply current Outputs disabled; VCC = 5.5V 500 nA

74ABT843

DESCRIPTION

The 74ABT843 Bus interface latch is designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider data/address paths of buses carrying parity.

The 74ABT843 consists of nine D-type latches with 3-State outputs. In addition to the LE and OE and Preset (PRE

) pin. These pins are ideal for parity bus interfacing in high performance systems. When MR if OE

is Low. When MR is High, data can be entered into the latch.

When PRE

is Low, the outputs are High, if OE is Low. PRE

overrides MR.

CONDITIONS

T

= 25°C; GND = 0V

amb

CC

pins, it has a Master Reset (MR) pin

is Low, the outputs are Low

TYPICAL UNIT

4 pF

7 pF

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

24-Pin Plastic DIP –40°C to +85°C 74ABT843 N 74ABT843 N SOT222-1 24-Pin plastic SO –40°C to +85°C 74ABT843 D 74ABT843 D SOT137-1 24-Pin Plastic SSOP Type II –40°C to +85°C 74ABT843 DB 74ABT843 DB SOT340-1 24-Pin Plastic TSSOP Type I –40°C to +85°C 74ABT843 PW 74ABT843PW DH SOT355-1

PIN CONFIGURATION

OE D0 D1 D2 D3 D4

D5

D6

D7 Q7

10 15

D8

11 14MR 12 13GND

1 2 3 4 5 6 7 8 9

TOP VIEW

24

V

23

Q0

22

Q1

21

Q2

20

Q3

19

Q4

18

Q5

17

Q6

16

Q8 PRE LE

SA00250

CC

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

1 OE

2, 3, 4, 5, 6,

7, 8, 9, 10

23, 22, 21, 20,

19,18, 17, 16, 15

D0-D8 Data inputs

Q0-Q8 Data outputs 11 MR Master reset input (active-Low) 13 LE 14 PRE Preset input (active-Low)

12 GND Ground (0V) 24 V

CC

Output enable input (active-Low)

Latch enable input (active rising edge)

Positive supply voltage

1998 Jan 16 853-1620 18864

2

Philips Semiconductors Product specification

9-bit bus interface latch with set and reset (3-State)

LOGIC SYMBOL

2345678910

D0 D1 D2 D3 D4 D5 D6 D7 D8

13

LE

14

PRE

11

MR

1

OE Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8

23 22 21 20 19 18 17 16 15

SA00251

LOGIC SYMBOL (IEEE/IEC)

1

EN

11

R

14

S2

13

C1

223

1D

322 421 520 619 718 817 916

10 15

74ABT843

SA00252

FUNCTION TABLE

INPUTS OUTPUTS OPERATING MODE

OE PRE MR LE Dn Qn

L L X X X H Preset L H L X X L Clear L

L L

L

H X X X X Z High impedance

L H H L X NC Hold

H = High voltage level h = High voltage level one set-up time prior to the High-to-Low LE transition L = Low voltage level l = Low voltage level one set-up time prior to the High-to-Low LE transition NC= No change X = Don’t care Z = High impedance “off” state ↓ = High-to-Low transition

H H

↓ ↓

L

H

l

h

L

H

L

H

Transparent

Latched

1998 Jan 16

3

Philips Semiconductors Product specification

9-bit bus interface latch with set and reset (3-State)

LOGIC DIAGRAM

PRE

MR

OE

D0

14

11

13

LE

1

2

D1

3

PPPPPPPPP

D

LQ

C

D

LQ

23

Q0

D2

4

D

C C C C C C C C

LQ

22

Q1

D3

5

D

LQ

21

Q2

Q3

20

D4

6

D

LQ

Q4

D5

19

7

D

LQ

Q5

18

D6

8

D

LQ

Q6

17

D7

9

D

LQ

74ABT843

D8

10

D

LQ

16

Q7

Q8

SA00253

15

ABSOLUTE MAXIMUM RA TINGS

SYMBOL

V

CC

I

IK

V

I

OK

V

OUT

I

OUT

T

stg

DC supply voltage –0.5 to +7.0 V DC input diode current VI < 0 –18 mA DC input voltage DC output diode current VO < 0 –50 mA DC output voltage DC output current output in Low state 128 mA Storage temperature range –65 to 150 °C

PARAMETER CONDITIONS RATING UNIT

3

1, 2

–1.2 to +7.0 V

output in Off or High state –0.5 to +5.5 V

NOTES:

1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability .

2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.

3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

1998 Jan 16

4

Philips Semiconductors Product specification

9-bit bus interface latch with set and reset (3-State)

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER LIMITS UNIT

Min Max

V

CC

V V V I

OH

I

OL

∆t/∆v Input transition rise or fall rate 0 10 ns/V

T

amb

DC ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER TEST CONDITIONS T

V

IK

V

OH

V

OL

V

RST

I

OFF

I

PU/IPD

I

OZH

I

OZL

I

CEX

I

O

I

CCH

I

CCL

I

CCZ

∆I

CC

NOTES:

1. Not more than one output should be tested at a time, and the duration of the test should not exceed one second.

2. This is the increase in supply current for each input at 3.4V.

3. For valid test results, data must not be loaded into the flip–flops (or latches) after applying the power.

4. This parameter is valid for any V transition time of up to 100µsec is permitted.

DC supply voltage 4.5 5.5 V Input voltage 0 V

I

High-level input voltage 2.0 V

IH

Low-level input voltage 0.8 V

IL

High-level output current –32 mA Low-level output current 64 mA

Operating free-air temperature range –40 +85 °C

LIMITS

= +25°C

amb

Min Typ Max Min Max

Input clamp voltage VCC = 4.5V; IIK = –18mA –0.9 –1.2 –1.2 V

VCC = 4.5V; IOH = –3mA; VI = VIL or V

High–level output voltage VCC = 5.0V; IOH = –3mA; VI = VIL or V

VCC = 4.5V; IOH = –32mA; VI = VIL or V Low–level output voltage VCC = 4.5V; IOL = 64mA; VI = VIL or V Power–up output low

3

voltage Input leakage current VCC = 5.5V; VI = GND or 5.5V ±0.01 ±1.0 ±1.0 µA

I

Power-off leakage current VCC = 0.0V; VO or V Power-up/down 3–state

output current

4

VCC = 5.5V; IO = 1mA; VI = V

≤ 4.5V ±5.0 ±100 ±100 µA

I

VCC = 2.0V; VO = 0.5V; V

GND or V

CC

OE

CC

= V

3-State output High current VCC = 5.5V; VO = 2.7V; VI = VIL or V 3-State output Low current VCC = 5.5V; VO = 0.5V; VI = VIL or V Output high leakage current VCC = 5.5V; VO = 5.5V; VI = GND or V Output current

1

VCC = 5.5V; VO = 2.5V –50 –80 –180 –50 –180 mA

IH

or GND 0.13 0.55 0.55 V

; VI =

CC

IH

CC

VCC = 5.5V; Outputs High, VI = GND or V Quiescent supply current VCC = 5.5V; Outputs Low, VI = GND or V

CC

VCC = 5.5V; Outputs 3-State;

Additional supply current per input pin

2

between 0V and 2.1V with a transition time of up to 10msec. For VCC = 2.1V to VCC = 5V  10%, a

CC

VI = GND or V

VCC = 5.5V; one input at 3.4V,

other inputs at VCC or GND

CC

2.5 2.9 2.5 V

3.0 3.4 3.0 V

2.0 2.4 2.0 V

0.42 0.55 0.55 V

±5.0 ±50 ±50 µA

5.0 50 50 µA

–5.0 –50 –50 µA

5.0 50 50 µA

CC

0.5 250 250 µA 25 34 34 mA

0.5 250 250 µA

0.5 1.5 1.5 mA

74ABT843

CC

T

= –40°C

amb

to +85°C

V

UNIT

1998 Jan 16

5