74abt845d NXP Semiconductors, 74abt845d Datasheet

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74abt845d

Manufacturer Part Number
74abt845d
Description
8-bit Bus Interface Latch With Set And Reset 3-state
Manufacturer
NXP Semiconductors
Datasheet
FEATURES
QUICK REFERENCE DATA
ORDERING INFORMATION
PIN CONFIGURATION
Philips Semiconductors
24-Pin Plastic DIP
24-Pin plastic SO
24-Pin Plastic SSOP Type II
24-Pin Plastic TSSOP Type I
1995 Sep 06
High speed parallel latches
Ideal where high speed, light loading, or increased fan-in are
required with MOS microprocessors
Broadside pinout
Output capability: +64mA/–32mA
Power-up 3-State
Power-up reset
Latch-up protection exceeds 500mA per Jedec Std 17
ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
8-bit bus interface latch with set and reset
(3-State)
SYMBOL
C
I
t
t
C
PLH
PHL
CCZ
OUT
IN
PACKAGES
GND
OE0
OE1
Propagation delay
Dn to Qn
Input capacitance
Output capacitance
Total supply current
MR
D0
D1
D2
D3
D4
D5
D6
D7
10
12
11
1
2
3
4
5
6
7
8
9
TOP VIEW
PARAMETER
TEMPERATURE RANGE
24
23
22
21
20
19
18
17
16
15
14
13
V
OE2
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
PRE
LE
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
CC
SA00258
C
V
Outputs disabled;
V
Outputs disabled; V
L
I
O
= 0V or V
= 50pF; V
= 0V or V
OUTSIDE NORTH AMERICA
1
T
DESCRIPTION
The 74ABT845 consists of eight D-type latches with 3-State outputs.
In addition to the LE, OE, MR and PRE pins, the 74ABT845 has two
additional OE pins, making a total of three Output Enable (OE0,
OE1, OE2) pins. The multiple Output enables allow multiuser control
of the interface, e.g., CS, DMA, and RD/WR.
PIN DESCRIPTION
74ABT845 PW
74ABT845 DB
CC
amb
74ABT845 N
74ABT845 D
22, 21, 20, 19,18,
CC
CC
PIN NUMBER
CONDITIONS
= 5V
7, 8, 9, 10
17, 16, 15
3, 4, 5, 6,
= 25 C; GND = 0V
1, 2, 23
CC
13
14
12
24
11
= 5.5V
OE0 – OE2
SYMBOL
D0-D7
Q0-Q7
GND
PRE
V
MR
LE
NORTH AMERICA
CC
74ABT845PW DH
74ABT845 DB
74ABT845 N
74ABT845 D
Output enable inputs
(active-Low)
Data inputs
Data outputs
Master reset input (active-Low)
Latch enable input
(active-High)
Preset input (active-Low)
Ground (0V)
Positive supply voltage
TYPICAL
500
5.4
4
7
FUNCTION
Product specification
74ABT845
DWG NUMBER
853-1703 15702
SOT222-1
SOT137-1
SOT340-1
SOT355-1
UNIT
nA
ns
pF
pF

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74abt845d Summary of contents

Page 1

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) FEATURES High speed parallel latches Ideal where high speed, light loading, or increased fan-in are required with MOS microprocessors Broadside pinout Output capability: +64mA/–32mA Power-up 3-State Power-up reset Latch-up ...

Page 2

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) LOGIC SYMBOL (IEEE/IEC) 1 & FUNCTION TABLE OUTPU INPUTS TS ...

Page 3

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) 1,2 ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER V DC supply voltage input diode current input voltage output diode current OK ...

Page 4

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) DC ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER V Input clamp voltage IK V High–level output voltage OH V Low–level output voltage OL Power-up output low V RST 3 voltage I Input ...

Page 5

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) AC CHARACTERISTICS GND = 0V 2.5ns 50pF 500 SYMBOL PARAMETER t Propagation delay PLH ...

Page 6

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) AC WAVEFORMS NOTE: For all waveforms 1.5V. M PRE MR PLH Waveform 1. Propagation Delay, Data to Output, ...

Page 7

Philips Semiconductors 8-bit bus interface latch with set and reset (3-State) TEST CIRCUIT AND WAVEFORM OUT PULSE D.U.T. GENERATOR R T Test Circuit for 3-State Outputs SWITCH POSITION TEST SWITCH t closed PLZ t closed ...

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