Philips Semiconductors Product data

Octal transceiver with direction pin (3-State) 74ABT245

FEATURES DESCRIPTION
• Octal bidirectional bus interface The 74ABT245 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
• 3-State buffers output drive.
• Output capability: +64 mA/–32 mA The 74ABT245 device is an octal transceiver featuring non-inverting
• Latch-up protection exceeds 500 mA per Jedec Std 17 3-State bus compatible outputs in both send and receive directions.
The control function implementation minimizes external timing
• ESD protection exceeds 2000 V per MIL STD 833 Method 3015 requirements. The device features an Output Enable (OE) input for
and 200 V per Machine Model easy cascading and a Direction (DIR) input for direction control.

• Power-up 3-State
• Live insertion/extraction permitted
• Inputs are disabled during 3-State mode

QUICK REFERENCE DATA

CONDITIONS
SYMBOL PARAMETER TYPICAL UNIT
Tamb = 25 °C; GND = 0 V
tPLH Propagation delay 2.2
CL = 50 pF; VCC = 5 V ns
tPHL An to Bn or Bn to An 2.9
CIN Input capacitance DIR, OE VI = 0 V or VCC 4 pF
CI/O I/O pin capacitance Outputs disabled; VO = 0 V or VCC 7 pF
ICCZ Total supply current Outputs disabled; VCC =5.5 V 50 µA

ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE PART NUMBER DWG NUMBER

20-Pin plastic SO –40 °C to +85 °C 74ABT245D SOT163-1

20-Pin Plastic SSOP Type II –40 °C to +85 °C 74ABT245DB SOT339-1

20-Pin Plastic TSSOP Type I –40 °C to +85 °C 74ABT245PW SOT360-1

PIN CONFIGURATION PIN DESCRIPTION

PIN
SYMBOL NAME AND FUNCTION
DIR 1 20 VCC NUMBER
A0 2 19 OE 1 DIR Direction control input
A1 3 18 B0 2, 3, 4, 5,
A0 – A7 Data inputs/outputs (A side)
A2 4 17 B1 6, 7, 8, 9
A3 5 16 B2 18, 17, 16,
15, 14, 13, B0 – B7 Data inputs/outputs (B side)
A4 6 15 B3 12, 11
A5 7 14 B4
19 OE Output enable input (active-LOW)
A6 8 13 B5
10 GND Ground (0 V)
A7 9 12 B6
20 VCC Positive supply voltage
GND 10 11 B7

SA00121

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Philips Semiconductors Product data

Octal transceiver with direction pin (3-State) 74ABT245

LOGIC SYMBOL LOGIC SYMBOL (IEEE/IEC)

1
DIR 19
19 G3
OE
3 EN1 (BA)
2
A0 1
18 3 EN2 (AB)
B0
3
A1
17
B1 1
4
A2 2 18
16 2
B2
5 3 17
A3
15
B3 4 16
6
A4
14 5 15
B4
7 14
A5 6
13
B5 7 13
8
A6
12 8 12
B6
9
A7 9 11
11
B7
SA00122 SA00123

FUNCTION TABLE
INPUTS INPUTS/OUTPUTS

OE DIR An Bn

L L An = Bn Inputs

L H Inputs Bn = An

H X Z Z
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state

ABSOLUTE MAXIMUM RATINGS1, 2

SYMBOL PARAMETER CONDITIONS RATING UNIT

VCC DC supply voltage –0.5 to +7.0 V

IIK DC input diode current VI < 0 –18 mA

VI DC input voltage3 –1.2 to +7.0 V

IOK DC output diode current VO < 0 –50 mA

VOUT DC output voltage3 output in Off or High state –0.5 to +5.5 V

IOUT DC output current output in Low state 128 mA

Tstg Storage temperature range –65 to 150 °C

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.

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Philips Semiconductors Product data

Octal transceiver with direction pin (3-State) 74ABT245

RECOMMENDED OPERATING CONDITIONS

LIMITS
SYMBOL PARAMETER UNIT
Min Max
VCC DC supply voltage 4.5 5.5 V
VI Input voltage 0 VCC V
VIH HIGH-level input voltage 2.0 V
VIL LOW-level Input voltage 0.8 V
IOH HIGH-level output current –32 mA
IOL LOW-level output current 64 mA
∆t/∆v Input transition rise or fall rate 0 5 ns/V
Tamb Operating free-air temperature range –40 +85 °C

DC ELECTRICAL CHARACTERISTICS
LIMITS
Tamb = –40 °C
SYMBOL PARAMETER TEST CONDITIONS Tamb = +25 °C UNIT
to +85 °C
Min Typ Max Min Max
VIK Input clamp voltage VCC = 4.5 V; IIK = –18 mA –0.9 –1.2 –1.2 V
VCC = 4.5 V; IOH = –3 mA; VI = VIL or VIH 2.5 2.9 2.5 V
VOH High-level output voltage VCC = 5.0 V; IOH = –3 mA; VI = VIL or VIH 3.0 3.4 3.0 V
VCC = 4.5 V; IOH = –32 mA; VI = VIL or VIH 2.0 2.4 2.0 V
VOL Low-level output voltage VCC = 4.5 V; IOL = 64 mA; VI = VIL or VIH 0.42 0.55 0.55 V

Input leakage
g Control pins VCC = 5.5 V; VI = GND or 5.5 V ±0.01 ±1.0 ±1.0 µA
II
current Data pins VCC = 5.5 V; VI = GND or 5.5 V ±5 ±100 ±100 µA
IOFF Power-off leakage current VCC = 0.0 V; VI or VO ≤ 4.5 V ±5.0 ±100 ±100 µA
Power-up/down 3-State VCC = 2.0 V; VO = 0.5 V; VI = GND or VCC;
IPU/IPD ±5.0 ±50 ±50 µA
output current3 VOE = Don’t care
IIH + IOZH 3-State output High current VCC = 5.5 V; VO = 2.7 V; VI = VIL or VIH 5.0 50 50 µA
IIL + IOZL 3-State output Low current VCC = 5.5 V; VO = 0.5 V; VI = VIL or VIH –5.0 –50 –50 µA
ICEX Output high leakage current VCC = 5.5 V; VO = 5.5 V; VI = GND or VCC 5.0 50 50 µA
IO Output current1 VCC = 5.5 V; VO = 2.5 V –40 –100 –180 –40 –180 mA
VCC = 5.5 V; Outputs HIGH;
ICCH 50 250 250 µA
VI = GND or VCC
VCC = 5.5 V; Outputs LOW;
ICCL Quiescent supply current 24 30 30 mA
VI = GND or VCC
VCC = 5.5 V; Outputs 3-State;
ICCZ 50 250 250 µA
VI = GND or VCC
Outputs enabled, one input at 3.4 V, other
0.5 1.5 1.5 mA
inputs at VCC or GND; VCC = 5.5 V
Additional supply current per Outputs 3-State, one data input at 3.4 V,
∆ICC 50 250 250 µA
input pin2 other inputs at VCC or GND; VCC = 5.5 V
Outputs 3-State, one enable input at 3.4 V,
0.5 1.5 1.5 mA
other inputs at VCC or GND; VCC = 5.5 V
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 3.4 V.
3. This parameter is valid for any VCC between 0 V and 2.1 V with a transition time of up to 10 msec. For VCC = 2.1 V to VCC = 5 V"10%, a
transition time of up to 100 µsec is permitted.

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Philips Semiconductors Product data

Octal transceiver with direction pin (3-State) 74ABT245

AC CHARACTERISTICS
GND = 0 V; tR = tF = 2.5 ns; CL = 50 pF, RL = 500 Ω
LIMITS
Tamb = +25 °C Tamb = –40 °C to +85 °C
SYMBOL PARAMETER WAVEFORM UNIT
VCC = +5.0 V VCC = +5.0 V ±0.5 V
Min Typ Max Min Max
tPLH Propagation delay 1.0 2.2 4.1 1.0 4.6
1 ns
tPHL An to Bn or Bn to An 1.0 2.9 4.2 1.0 4.6
tPZH Output enable time 1.3 3.0 4.8 1.3 5.3
2 ns
tPZL to HIGH and LOW level 2.3 4.0 5.8 2.3 6.3
tPHZ Output disable time 1.0 4.7 6.2 1.0 7.2
2 ns
tPLZ from HIGH and LOW Level 1.0 4.1 5.8 1.0 6.3

AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V

nOE INPUT

VM VM
An or Bn
INPUT VM VM

tPZL tPLZ 3.5V

tPLH tPHL OUTPUT

VM
VOL + 0.3V
Bn or An VOL
VM VM
OUTPUT
tPZH tPHZ
VOH
VOH – 0.3V

VM
SA00124 OUTPUT
0V
Waveform 1. Waveforms showing the input to output
propagation delays SA00024

Waveform 2. Waveforms showing the 3-State Output Enable

and Disable times

TEST CIRCUIT AND WAVEFORMS

7V
500 Ω S1
From Output Open
Under Test
GND
CL = 50 pF 500 Ω

Load Circuit

TEST S1

tpd open

tPLZ/tPZL 7V

tPHZ/tPZH open

DEFINITIONS
CL = Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.

SA00012