Philips Semiconductors Product specification
GTL16612
18-bit GTL/GTL
+
to LVTTL/TTL bidirectional
universal translator (3-State)
2
2002 Dec 13
FEATURES
• 18-bit bidirectional bus interface
• Translates between GTL/GTL+ logic levels (B ports) and
LVTTL/TTL logic levels (A ports)
• 5 V I/O tolerant on the LVTTL/TTL side (A ports)
• No bus current loading when LVTTL/TTL output is tied to 5 V bus
• 3-State buffers
• Output capability: +64 mA/-32 mA on the LVTTL/TTL side
(A ports); +40 mA on the GTL/GTL+ side (B ports)
• TTL input levels on control pins
• Power-up reset
• Power-up 3-State
• Positive edge triggered clock inputs
• Latch-up protection exceeds 500 mA per JESD78
• ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
DESCRIPTION
The GTL16612 is a high-performance BiCMOS product designed for
V
CC
operation at 3.3 V with I/O compatibility up to 5 V.
This device is an 18-bit universal transceiver featuring non-inverting
3-State bus compatible outputs in both send and receive directions.
Data flow in each direction is controlled by output enable (OEAB
and
OEBA
), latch enable (LEAB and LEBA), and clock (CPAB and
CPBA) inputs. For A-to-B data flow, the device operates in the
transparent mode when LEAB is High. When LEAB is Low, the A
data is latched if CPAB is held at a High or Low logic level. If LEAB
is Low, the A-bus data is stored in the latch/flip-flop on the
Low-to-High transition of CPAB. When OEAB
is Low, the outputs are
active. When OEAB
is High, the outputs are in the high-impedance
state. The clocks can be controlled with the clock-enable inputs
(CEBA
/CEAB).
Data flow for B-to-A is similar to that of A-to-B but uses OEBA
,
LEBA and CPBA.
QUICK REFERENCE DATA
CONDITIONS
TYPICAL
SYMBOL PARAMETER
CONDITIONS
T
amb
= 25 °C
3.3 V
UNIT
t
PLH
t
PHL
Propagation delay
An to Bn or Bn to An
C
L
= 50 pF 1.9 ns
C
IN
Input capacitance (Control pins) V
I
= 0 V or V
CC
4 pF
C
I/O
I/O pin capacitance Outputs disabled; V
I/O
= 0 V or V
CC
8 pF
I
CCZ
Total supply current Outputs disabled 12 mA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DWG NUMBER
56-Pin Plastic SSOP -40 to +85 °C GTL16612DL SOT371-1
56-Pin Plastic TSSOP -40 to +85 °C GTL16612DGG SOT364-1
Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
