74ABT2953 Datasheet, PDF (1/6 Pages) NXP Semiconductors – Octal registered transceiver, inverting 3-State

Philips Semiconductors
Octal registered transceiver, inverting (3-State)
Product specification
74ABT2953
FEATURES
• 8-bit registered transceiver
• Independent registers for A and B buses
• 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
• Live insertion/extraction permitted
• Power-up 3-State
• Power-up reset
DESCRIPTION
The 74ABT2953 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
The 74ABT2953 device is an 8-bit registered inverting transceiver.
Two 8-bit back-to-back registers store data flowing in both directions
between two bidirectional buses. Data applied to the inputs is
entered and stored on the rising edge of the Clock (CPXX) provided
that the Clock Enable (CEXX) is Low. The data is then present at
the 3-State output buffers, but is only accessible when the Output
Enable (OEXX) is Low. Data flow from A inputs to B outputs is the
same as for B inputs to A outputs.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
t_PLH
Propagation delay
t_PHL
CPBA to An or CPAB to Bn
C_IN
Input capacitance
C_I/O
I/O capacitance
I_CCZ
Total supply current
CONDITIONS
T_amb = 25°C; GND = 0V
C_L = 50pF; V_CC = 5V
V_I = 0V or V_CC
Outputs disabled;
V_O = 0V or V_CC
Outputs disabled; V_CC =5.5V
TYPICAL
5.0
4
7
500
UNIT
ns
pF
pF
nA
ORDERING INFORMATION
PACKAGES
24-Pin Plastic DIP
24-Pin plastic SO
24-Pin Plastic SSOP Type II
24-Pin Plastic TSSOP Type I
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
–40°C to +85°C
74ABT9253 N
–40°C to +85°C
74ABT2953 D
–40°C to +85°C
74ABT2953 DB
–40°C to +85°C
74ABT2953 PW
NORTH AMERICA
74ABT2953 N
74ABT2953 D
74ABT2953 DB
74ABT2953PW DH
DWG NUMBER
SOT222-1
SOT137-1
SOT340-1
SOT355-1
PIN CONFIGURATION
B7 1
B6 2
B5 3
B4 4
B3 5
B2 6
B1 7
B0 8
OEAB 9
CPAB 10
CEAB 11
GND 12
24 V_CC
23 A7
22 A6
21 A5
20 A4
19 A3
18 A2
17 A1
16 A0
15 OEBA
14 CPBA
13 CEBA
TOP VIEW
PIN DESCRIPTION
PIN NUMBER SYMBOL
10, 14
CPAB /
CPBA
11, 13
CEAB /
CEBA
16, 17, 18, 19,
20, 21, 22, 23
A0 – A7
1, 2, 3, 4, 5, 6,
7, 8
B0 – B7
9, 15
OEAB /
OEBA
12
GND
24
V_CC
NAME AND FUNCTION
Clock input A to B / Clock input
B to A
Clock enable input A to B / Clock
enable input B to A
Data inputs/outputs (A side)
Data outputs/outputs (B side)
Output enable inputs
Ground (0V)
Positive supply voltage
SA00305
1995 Sep 06
1
853-1555 15702